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Q601. Which of the following is a common characteristic of both acids and bases when dissolved in water?
· A) Both turn blue litmus red
· B) Both produce carbon dioxide when reacted with metal carbonates
· C) Both release hydrogen gas on reacting with metals like zinc
· D) Both produce ions that conduct electricity in aqueous solutions
Answer: D
Description: Answer: Both produce ions that conduct electricity in aqueous solutions। Acids और bases water में ions बनाते हैं, इसलिए उनके aqueous solutions electricity conduct करते हैं। इसलिए सही उत्तर option D है
Q602. The atomic number is defined as the total number of __________ present in the nucleus of an atom.
· A) only protons
· B) neutrons and half of the protons
· C) only neutrons
· D) protons and neutrons
Answer: A
Description: Answer: only protons। Atomic number nucleus में उपस्थित protons की संख्या को दर्शाता है। इसलिए सही उत्तर option A है
Q603. Which among the following organic compounds is saturated?
· A) Propene
· B) Propyne
· C) 2-Bromopropene
· D) Bromopropane
Answer: D
Description: Answer: Bromopropane। Saturated compounds में केवल single bonds होते हैं। Bromopropane में सभी carbon-carbon bonds single हैं। इसलिए सही उत्तर option D है
Q604. ___ generally has long, unstable carbon chains.
· A) Table salt
· B) Glucose
· C) Water
· D) Vegetable oil
Answer: D
Description: Answer: Vegetable oil। Vegetable oils में लंबे carbon chains वाले unsaturated compounds होते हैं। इसलिए सही उत्तर option D है
Q605. Megaphones, loudhailers, and shehnais are designed to:
· A) reduce the intensity of sound waves
· B) convert sound waves into electrical signals
· C) spread sound waves equally in all directions
· D) focus sound waves in a particular direction
Answer: D
Description: Answer: focus sound waves in a particular direction। ये उपकरण sound waves को एक विशेष दिशा में केंद्रित करते हैं ताकि sound दूर तक स्पष्ट सुनाई दे। इसलिए सही उत्तर option D है
Q606. The working principle of a stethoscope is based on the _______.
· A) reflection of sound
· B) conversion of sound into light for observation
· C) absorption of high-frequency sound
· D) conversion of sound into electric signals only
Answer: A
Description: Answer: reflection of sound। Stethoscope में sound multiple reflections के माध्यम से doctor के कान तक पहुँचती है। इसलिए सही उत्तर option A है
Q607. Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R). Assertion (A): Vegetative propagation helps grow plants that do not produce seeds. Reason (R): It uses flowers to grow new plants.
· A) Both A and R are true, and R is the correct explanation of A
· B) A is true, but R is false
· C) Both A and R are true, but R is not the correct explanation of A
· D) A is false, but R is true
Answer: B
Description: Answer: A is true, but R is false। Vegetative propagation stem, root या leaf जैसे vegetative parts से होती है, flowers से नहीं। इसलिए सही उत्तर option B है
Q608. An electric bulb draws a current of 0.15 A for 8 minutes. How much electric charge flows through the circuit during this time?
· A) 1.2 C
· B) 72 C
· C) 72 A
· D) 720 C
Answer: B
Description: Answer: 72 C। Formula: Q = I × t। यहाँ I = 0.15 A और t = 8 min = 480 s। इसलिए Q = 0.15 × 480 = 72 C। सही उत्तर option B है
Q609. Which of the following types of reactions is a neutralisation reaction?
· A) Decomposition
· B) Double displacement
· C) Combustion
· D) Single displacement
Answer: B
Description: Answer: Double displacement। Neutralisation reaction में acid और base अपने ions exchange करते हैं, इसलिए यह double displacement reaction होती है। सही उत्तर option B है
Q610. The work required by an external force to bring a moving body to rest is equal to:
· A) its momentum
· B) its potential energy
· C) its weight
· D) its kinetic energy
Answer: D
Description: Answer: its kinetic energy। Work-energy theorem के अनुसार body को रोकने के लिए किया गया work उसकी initial kinetic energy के बराबर होता है। इसलिए सही उत्तर option D है
Q611. Which of the following statements is INCORRECT for mass number?
· A) Isobars have same mass number
· B) Protium and deuterium have same the mass number
· C) Mass number is equal to the sum of number of neutrons and number of protons
· D) The number of nucleons is same as mass number
Answer: B
Description: Answer: Protium and deuterium have same the mass number। Protium का mass number 1 और deuterium का mass number 2 होता है। इसलिए यह कथन गलत है। सही उत्तर option B है
Q612. Select the statement regarding the cytoplasm of a cell that is INCORRECT.
· A) In a plant cell, cytoplasm is found between cell wall and plasma membrane
· B) Cytoplasm is present in both eukaryotic and prokaryotic cells
· C) Cytoplasm is the fluid-filled region inside plasma membrane
· D) Cytoplasm contains many cell organelles
Answer: A
Description: Answer: In a plant cell, cytoplasm is found between cell wall and plasma membrane। Cytoplasm plasma membrane के अंदर पाया जाता है, cell wall और plasma membrane के बीच नहीं। इसलिए सही उत्तर option A है
Q613. When an object is placed anywhere along the principal axis of a concave lens, the image is always formed ________.
· A) At 2F
· B) Beyond 2F
· C) At F
· D) Between F and optical centre (O)
Answer: D
Description: Answer: Between F and optical centre (O)। Concave lens हमेशा virtual, erect और diminished image बनाता है, जो focus (F) और optical centre (O) के बीच बनती है। इसलिए सही उत्तर option D है
Q614. Two objects of mass 100 kg each are separated by a distance of 1 m. What will be the magnitude of the gravitational force between the two objects? (G = 6.67 × 10⁻¹¹ Nm²
· A) 6.67 × 10⁷ N
· B) 6.67 × 10⁻⁹ N
· C) 6.67 × 10⁻⁷ N
· D) 6.67 × 10⁹ N
Answer: C
Description: Answer: 6.67 × 10⁻⁷ N। Formula: F = Gm₁m₂/r² = (6.67 × 10⁻¹¹ × 100 × 100)/1² = 6.67 × 10⁻⁷ N। इसलिए सही उत्तर option C है
Q615. Why clove oil is used as an olfactory indicator?
· A) Vigorous fuming of different colours is observed in acidic and basic medium
· B) Different colour effervescences are observed in acidic and basic medium
· C) It gives a different colour in acidic and basic medium
· D) It gives a different smell in acidic and basic medium
Answer: D
Description: Answer: It gives a different smell in acidic and basic medium। Olfactory indicators acidic और basic media में अलग-अलग smell देते हैं। इसलिए सही उत्तर option D है
Q616. Which of the following is an allotrope of carbon with a cage-like structure?
· A) Graphite
· B) Charcoal
· C) Fullerene
· D) Diamond
Answer: C
Description: Answer: Fullerene। Fullerene का structure cage-like या football-shaped होता है। इसलिए सही उत्तर option C है
Q617. Which of the following plants is unisexual?
· A) China rose
· B) Papaya
· C) Mustard
· D) Pea
Answer: B
Description: Answer: Papaya। Papaya में male और female flowers अलग-अलग plants पर पाए जाते हैं, इसलिए यह unisexual plant है। सही उत्तर option B है
Q618. What type of bond is formed when a metal reacts with a non-metal?
· A) Covalent bond
· B) Hydrogen bond
· C) Ionic bond
· D) Metallic bond
Answer: C
Description: Answer: Ionic bond। Metal electrons donate करता है और non-metal electrons accept करता है, जिससे ionic bond बनता है। इसलिए सही उत्तर option C है
Q619. In plants, after fertilisation, the ovule develops into which of the following?
· A) Fruit
· B) Embryo
· C) Endosperm
· D) Seed
Answer: D
Description: Answer: Seed। Fertilisation के बाद ovule seed में और ovary fruit में विकसित होती है। इसलिए सही उत्तर option D है
Q620. Which of the following statements about evaporation is true?
· A) It requires no heat
· B) It occurs only at boiling point
· C) It occurs throughout the liquid
· D) It occurs only at the surface of the liquid
Answer: D
Description: Answer: It occurs only at the surface of the liquid। Evaporation केवल liquid की surface पर होता है और किसी भी temperature पर हो सकता है। इसलिए सही उत्तर option D है
Q621. If several rays of light parallel to the principal axis are falling on a convex lens, which of the following statements is correct for the refracted ray?
· A) They pass without any deviation
· B) They converge at a point on the opposite side of the lens
· C) They meet at the infinity
· D) They diverge as if coming from the principal focus
Answer: B
Description: Answer: They converge at a point on the opposite side of the lens। Convex lens parallel rays को principal focus पर converge करता है। इसलिए सही उत्तर option B है
Q622. An object is placed at 80 cm on the left of a convex lens of focal length 40 cm. Where should a screen be placed to the right of the lens so that the image formed is real, inverted and same sized?
· A) The screen should be placed at 40 cm from the lens
· B) The screen should be placed anywhere between 20 cm and 40 cm from the lens
· C) The screen should be placed 80 cm from the lens
· D) The screen should be placed anywhere between 40 cm and 80 cm from the lens
Answer: C
Description: Answer: The screen should be placed 80 cm from the lens। Convex lens में object को 2F पर रखने पर image भी 2F पर real, inverted और same size की बनती है। यहाँ f = 40 cm, इसलिए 2F = 80 cm। सही उत्तर option C है
Q623. What does the area under a velocity-time graph represent for motion along a straight line?
· A) The final velocity of the object
· B) The change in acceleration
· C) The total distance between two points
· D) The total displacement of the object
Answer: D
Description: Answer: The total displacement of the object। Velocity-time graph के नीचे का area displacement को दर्शाता है। इसलिए सही उत्तर option D है
Q624. Which of the following is true about the magnetic field around a current carrying solenoid?
· A) The direction of magnetic field associated with the solenoid can be reversed by reversing the direction of current flowing through it
· B) The field associated with the solenoid can be increased by decreasing the number of turns in the solenoid
· C) The field line pattern of the solenoid resembles the magnetic field line pattern of a straight current carrying wire
· D) The field in the core of the solenoid decreases from one end to the other end
Answer: A
Description: Answer: The direction of magnetic field associated with the solenoid can be reversed by reversing the direction of current flowing through it। Solenoid में current की दिशा बदलने पर magnetic field की दिशा भी बदल जाती है। इसलिए सही उत्तर option A है
Q625. Observe the following chemical reaction: H₂S + I₂ → 2HI + S. Which of the following statements correctly describes this redox reaction?
· A) Both Statement I and II are incorrect
· B) Only Statement I is correct
· C) Both Statement I and II are correct
· D) Only Statement II is correct
Answer: C
Description: Answer: Both Statement I and II are correct। H₂S में sulphur का oxidation state -2 से 0 होता है, इसलिए oxidation होती है। I₂ का oxidation state 0 से -1 होकर HI बनता है, इसलिए reduction होती है। इसलिए सही उत्तर option C है
Q626. Which of the following is true regarding loudness of sound?
· A) Loudness depends on the amplitude
· B) Loudness depends on the speed of wave
· C) Loudness depends on the frequency
· D) Loudness depends on the wavelength
Answer: A
Description: Answer: Loudness depends on the amplitude। Sound wave की amplitude जितनी अधिक होगी, sound उतनी अधिक loud होगी। इसलिए सही उत्तर option A है
Q627. Which of the following species is reduced in the given reaction? CuO + H₂ → Cu + H₂O
· A) H₂O
· B) H₂
· C) O
· D) CuO
Answer: D
Description: Answer: CuO। CuO में copper का oxidation state +2 से 0 होकर Cu बनता है, इसलिए reduction CuO की होती है। इसलिए सही उत्तर option D है
Q628. The twinkling of stars is more pronounced when ________.
· A) the moon is bright
· B) the star is near the horizon
· C) the star is at the zenith
· D) the sky is cloudy
Answer: B
Description: Answer: the star is near the horizon। Horizon के पास star की light atmosphere की अधिक layers से गुजरती है, जिससे atmospheric refraction अधिक होता है और twinkling ज्यादा दिखाई देती है। इसलिए सही उत्तर option B है
Q629. Which of the following plants reproduces by means of spores?
· A) Rose
· B) Gram
· C) Moss
· D) Egg plant
Answer: C
Description: Answer: Moss। Moss जैसे non-flowering plants spores द्वारा reproduction करते हैं। इसलिए सही उत्तर option C है
Q630. Bleaching powder is prepared by the reaction of:
· A) calcium carbonate with chlorine gas
· B) sodium hydroxide with chlorine gas
· C) calcium hydroxide with chlorine gas
· D) calcium hydroxide with hydrochloric acid
Answer: C
Description: Answer: calcium hydroxide with chlorine gas। Bleaching powder Ca(OH)₂ पर chlorine gas प्रवाहित करके तैयार किया जाता है। इसलिए सही उत्तर option C है
Q631. Which of the following carbon compounds burns with a blue, non-sooty flame under normal conditions?
· A) Ethanol
· B) Charcoal
· C) Diesel
· D) Kerosene
Answer: A
Description: Answer: Ethanol। Ethanol clean fuel है और यह blue, non-sooty flame के साथ जलता है। इसलिए सही उत्तर option A है
Q632. If Girl A takes 20 s and Girl B takes 50 s to climb a rope, both performing 3200 J of work, their difference in performance is characterised by which physical concept?
· A) Gravitational force
· B) Power
· C) Total displacement
· D) Total energy consumed
Answer: B
Description: Answer: Power। समान work को अलग-अलग समय में करने पर performance का अंतर power से व्यक्त किया जाता है। इसलिए सही उत्तर option B है
Q633. Which of the following statements about ethanol is correct?
· A) Ethanol reacts with sodium to form carbon dioxide
· B) Ethanol is a liquid with a pleasant smell and is miscible with water
· C) Ethanol does not dissolve in water
· D) Ethanol is a non-volatile solid
Answer: B
Description: Answer: Ethanol is a liquid with a pleasant smell and is miscible with water। Ethanol एक volatile liquid है जो पानी में पूरी तरह घुल जाता है। इसलिए सही उत्तर option B है
Q634. Which of the following activities CANNOT be taken as a defining characteristic of life?
· A) Growth-related movement of plants
· B) Breathing and internal maintenance of cells
· C) Visible movement like walking or running
· D) Molecular movement within the cells
Answer: C
Description: Answer: Visible movement like walking or running। सभी living organisms visible movement नहीं दिखाते, इसलिए यह life की defining characteristic नहीं है। इसलिए सही उत्तर option C है
Q635. Which crop variety improvement method involves selecting parents with desirable traits and crossing them?
· A) Genetic Engineering
· B) Hybridisation
· C) Tissue Culture
· D) Mutation
Answer: B
Description: Answer: Hybridisation। Hybridisation में desirable traits वाले parents को cross किया जाता है ताकि improved variety प्राप्त हो सके। इसलिए सही उत्तर option B है
Q636. One volt (1 V), the SI unit of potential difference, is defined when ___________.
· A) 1 coulomb of charge flows in 1 second
· B) 1 joule of energy is dissipated in 1 second
· C) 1 joule of work is done to move a charge of 1 coulomb
· D) 1 milliampere of current flows through 1 Ohm of resistance
Answer: C
Description: Answer: 1 joule of work is done to move a charge of 1 coulomb। Formula: V = W/Q। जब 1 coulomb charge को move करने में 1 joule work हो, तब potential difference 1 volt होता है। इसलिए सही उत्तर option C है
Q637. A ball is dropped from a height of 10 m from the surface of the earth. What will be the speed with which the ball will strike the ground? (Take g = 10 m
· A) 200 m/s
· B) 20 m/s
· C) 10√2 m/s
· D) 10 m/s
Answer: C
Description: Answer: 10√2 m/s। Formula: v² = u² + 2gh। यहाँ u = 0, g = 10 m/s², h = 10 m। इसलिए v² = 2 × 10 × 10 = 200 ⇒ v = 10√2 m/s। सही उत्तर option C है
Q638. Which phenomenon, successfully explained by the universal law of gravitation, relies on the combined and differential gravitational attraction exerted by both the moon and the sun on the earth?
· A) The decrease in the value of g from poles to equator
· B) The motion of planets around the Sun
· C) The occurrence of ocean tides
· D) The centripetal force keeping the stone in a circular path
Answer: C
Description: Answer: The occurrence of ocean tides। Ocean tides चंद्रमा और सूर्य के gravitational pull के कारण उत्पन्न होती हैं। इसलिए सही उत्तर option C है
Q639. The generation of heat in a conductor due to electric current is known as:
· A) electrolysis
· B) Ohm’s Law
· C) electromagnetic induction
· D) Joule’s heating
Answer: D
Description: Answer: Joule’s heating। Electric current के flow से conductor में heat उत्पन्न होना Joule’s heating कहलाता है। इसलिए सही उत्तर option D है
Q640. The kinetic energy of a body of mass m moving with a velocity v m
· A) 16X J
· B) 8X J
· C) 4X J
· D) 2X J
Answer: A
Description: Answer: 16X J। Kinetic energy KE = 1/2 mv²। Velocity को 4 गुना करने पर KE = (4v)² = 16v² हो जाएगी। इसलिए kinetic energy 16 गुना हो जाएगी। सही उत्तर option A है
Q641. What is the relationship between the incident ray and the emergent ray after light passes through the two parallel opposite faces of a rectangular glass slab?
· A) The emergent ray converges to a point on the principal axis
· B) The emergent ray is parallel to the direction of the incident ray, but shifted sideward slightly
· C) The emergent ray is perpendicular to the incident ray
· D) The emergent ray is reflected back along the path of the incident ray
Answer: B
Description: Answer: The emergent ray is parallel to the direction of the incident ray, but shifted sideward slightly। Rectangular glass slab में emergent ray incident ray के parallel रहती है, लेकिन lateral displacement हो जाता है। इसलिए सही उत्तर option B है
Q642. Which of the following characteristics correctly describes skeletal (striated) muscles?
· A) Branched, uninucleate cells, involuntary control
· B) Long, cylindrical, unbranched, multinucleate cells, voluntary control
· C) Short, cylindrical, branched cells with intercalated discs
· D) Spindle-shaped, uninucleate cells, involuntary control
Answer: B
Description: Answer: Long, cylindrical, unbranched, multinucleate cells, voluntary control। Skeletal muscles voluntary muscles होती हैं और उनकी cells लंबी, cylindrical तथा multinucleate होती हैं। इसलिए सही उत्तर option B है
Q643. Which of the following is true about action and reaction forces according to Newton’s third law?
· A) They cancel each other out because they act on one object
· B) They act on the same object at different times
· C) They act on two different objects at the same time
· D) They act in the same direction on the same object
Answer: C
Description: Answer: They act on two different objects at the same time। Newton’s third law के अनुसार action और reaction equal एवं opposite forces होते हैं जो अलग-अलग objects पर एक साथ लगते हैं। इसलिए सही उत्तर option C है
Q644. Through which method of cell division are the diploid chromosomes divided into haploid gametes?
· A) Meiosis
· B) Binary Fission
· C) Amitosis
· D) Mitosis
Answer: A
Description: Answer: Meiosis। Meiosis reduction division है जिसमें diploid cells से haploid gametes बनते हैं। इसलिए सही उत्तर option A है
Q645. The magnetic field due to a solenoid carrying 'I' current is 'B'. What will be the magnetic field due to this solenoid, when the current flowing through the solenoid is halved? (Keeping all the other parameters the same)
· A) B/2
· B) B
· C) 2B
· D) B/4
Answer: A
Description: Answer: B/2। Solenoid का magnetic field current के directly proportional होता है। Current आधा करने पर magnetic field भी आधी हो जाएगी। इसलिए सही उत्तर option A है
Q646. A man contracts HIV even though his partner is healthy. Which of the following behaviours from his personality could explain this?
· A) Using sterilised needles
· B) Having multiple unprotected sexual partners
· C) Having protected sex
· D) Maintaining a healthy diet
Answer: B
Description: Answer: Having multiple unprotected sexual partners। HIV unprotected sexual contact से फैल सकता है, विशेषकर multiple partners होने पर risk बढ़ जाता है। इसलिए सही उत्तर option B है
Q647. Which of the following statements about work is FALSE?
· A) Work is a path-independent quantity for all forces
· B) Work is energy in transit
· C) Work has the same units as energy
· D) Work can be positive, negative, or zero
Answer: A
Description: Answer: Work is a path-independent quantity for all forces। Work सभी forces के लिए path-independent नहीं होता; non-conservative forces में यह path पर निर्भर करता है। इसलिए सही उत्तर option A है
Q648. Which of the following is a process in which absorbed substances from alimentary canal is transported to different organs where they are used to build complex substances?
· A) Photosynthesis
· B) Transpiration
· C) Digestion
· D) Assimilation
Answer: D
Description: Answer: Assimilation। Assimilation में absorbed nutrients body organs तक पहुँचकर उपयोग किए जाते हैं और complex substances बनते हैं। इसलिए सही उत्तर option D है
Q649. When substituting numerical values for the distances (u, v, f) into the Mirror Formula to solve problems, which prerequisite must be strictly followed?
· A) All measurements must be taken from the centre of curvature
· B) All values must be converted to metres
· C) The focal length (f) must always be taken as positive
· D) The New Cartesian Sign Convention must be used
Answer: D
Description: Answer: The New Cartesian Sign Convention must be used। Mirror formula में distances और focal length के signs सही लेने के लिए New Cartesian Sign Convention का उपयोग आवश्यक है। इसलिए सही उत्तर option D है
Q650. Which characteristic distinguishes suspensions from solutions?
· A) Their solute dissolves completely
· B) Their particles do not settle down when left undisturbed
· C) Their particles can be seen with naked eyes
· D) They are transparent
Answer: C
Description: Answer: Their particles can be seen with naked eyes। Suspension में particles बड़े होते हैं और naked eye से दिखाई देते हैं, जबकि solution में particles दिखाई नहीं देते। इसलिए सही उत्तर option C है
Q651. The refractive indices of water, glass and diamond are 1.33, 1.5, and 2.42, respectively. Light travels:
· A) the fastest in water medium
· B) at the same speed irrespective of the medium
· C) the fastest in glass medium
· D) the fastest in diamond medium
Answer: A
Description: Answer: the fastest in water medium। Refractive index जितना कम होता है, light की speed उतनी अधिक होती है। Water का refractive index सबसे कम है। इसलिए सही उत्तर option A है
Q652. Select the statement regarding cell organelles that is INCORRECT.
· A) Each cell organelle performs a special function
· B) They are found in Eukaryotic cells
· C) They are membrane-bound structures
· D) They are found in Prokaryotic cells
Answer: D
Description: Answer: They are found in Prokaryotic cells। Membrane-bound cell organelles केवल eukaryotic cells में पाए जाते हैं, prokaryotic cells में नहीं। इसलिए सही उत्तर option D है
Q653. A real and inverted image is formed at a distance of 30 cm from a concave mirror when the object is placed 40 cm from the mirror. What will be the magnification produced by the mirror?
· A) -4/3
· B) -3/4
· C) +4/3
· D) +3/4
Answer: B
Description: Answer: -3/4। Magnification m = -v/u = -30/40 = -3/4। Negative sign inverted image को दर्शाता है। इसलिए सही उत्तर option B है
Q654. A light ray passes through the centre of curvature of a convex mirror. What happens to it after reflection?
· A) It retraces its own path
· B) It becomes parallel to the principal axis
· C) It gets absorbed
· D) It converges at the focus
Answer: A
Description: Answer: It retraces its own path। Centre of curvature की दिशा में जाने वाली ray mirror पर normal incidence बनाती है, इसलिए reflection के बाद उसी path पर वापस लौटती है। इसलिए सही उत्तर option A है
Q655. Consider the following statements and select the correct option. Statement A: Alcohols react with sodium to evolve hydrogen. Statement B: No gas is evolved when sodium reacts with ethanol.
· A) Statement A is incorrect but B is correct
· B) Both statements A and B are incorrect
· C) Both statements A and B are correct
· D) Statement A is correct but B is incorrect
Answer: D
Description: Answer: Statement A is correct but B is incorrect। Alcohols sodium के साथ react करके hydrogen gas उत्पन्न करते हैं। Ethanol भी sodium के साथ react करके hydrogen gas देता है। इसलिए सही उत्तर option D है
Q656. Consider the following statements and select the correct option. Statement A: Sugarcane juice can be fermented to give alcohol (ethanol). Statement B: Alcohol is added to petrol because it is a cleaner fuel.
· A) Statement A is correct, but B is incorrect
· B) Statement A is incorrect, but B is correct
· C) Both statements A and B are correct
· D) Both statements A and B are incorrect
Answer: C
Description: Answer: Both statements A and B are correct। Sugarcane juice fermentation से ethanol बनता है और ethanol cleaner fuel होने के कारण petrol में मिलाया जाता है। इसलिए सही उत्तर option C है
Q657. A bullet of small mass and high velocity can penetrate a target deeper than a heavy stone thrown at the same speed because:
· A) it has less inertia
· B) it is sharper
· C) it has greater mass
· D) it is smaller in size
Answer: B
Description: Answer: it is sharper। Bullet का sharp shape pressure को छोटे area पर concentrate करता है, जिससे वह target में अधिक गहराई तक प्रवेश कर जाती है। इसलिए सही उत्तर option B है
Q658. Why does carbon form covalent bonds instead of ionic bonds?
· A) Carbon can easily gain or lose 4 electrons
· B) Carbon has 8 valence electrons
· C) It is energetically unfavourable to lose or gain 4 electrons
· D) It has a very large atomic radius
Answer: C
Description: Answer: It is energetically unfavourable to lose or gain 4 electrons। Carbon के लिए 4 electrons खोना या प्राप्त करना बहुत अधिक energy मांगता है, इसलिए वह electron sharing द्वारा covalent bonds बनाता है। इसलिए सही उत्तर option C है
Q659. What does the area under a velocity-time graph give?
· A) Force
· B) Acceleration
· C) Displacement
· D) Work done
Answer: C
Description: Answer: Displacement। Velocity-time graph के नीचे का area object के displacement को दर्शाता है। इसलिए सही उत्तर option C है
Q660. Match the following correctly.
· A) 1-a, 2-c, 3-b, 4-d
· B) 1-c, 2-d, 3-b, 4-a
· C) 1-d, 2-c, 3-b, 4-a
· D) 1-d, 2-b, 3-c, 4-a
Answer: C
Description: Answer: 1-d, 2-c, 3-b, 4-a। Correct matching: Pollination → Sepals, Fertilisation → Petals, Seed formation → Ovules, Fruit formation → Ovary। इसलिए सही उत्तर option C है
Q661. The formula unit mass of a substance is the sum of the atomic masses of all atoms in a formula unit of a
· A) element
· B) mixture
· C) compound
· D) atom
Answer: C
Description: Answer: compound। Formula unit mass मुख्यतः ionic compounds के लिए उपयोग किया जाता है। इसलिए सही उत्तर option C है
Q662. From the given alternatives, which part of the flower finally changes into a fruit in the flowering plant?
· A) Ovule
· B) Flower
· C) Seed
· D) Ovary
Answer: D
Description: Answer: Ovary। Fertilisation के बाद ovary fruit में तथा ovule seed में बदलता है। इसलिए सही उत्तर option D है
Q663. Which of the following is NOT applicable to the Law of Constant Proportion?
· A) Compounds
· B) Elements
· C) Mixtures
· D) Ionic Compounds
Answer: C
Description: Answer: Mixtures। Law of Constant Proportion केवल compounds पर लागू होता है क्योंकि उनमें elements निश्चित अनुपात में होते हैं, जबकि mixtures में composition बदल सकती है। इसलिए सही उत्तर option C है
Q664. Which of the following is NOT an olfactory indicator?
· A) Vanilla extract
· B) Onion
· C) Clove oil
· D) Turmeric
Answer: D
Description: Answer: Turmeric। Turmeric एक natural indicator है जो colour change दिखाता है, जबकि vanilla, onion और clove oil olfactory indicators हैं। इसलिए सही उत्तर option D है
Q665. Which of the following rays is NOT used to locate the image formed by a spherical mirror?
· A) A ray passing through the focus that reflects parallel to the principal axis
· B) A ray perpendicular to the principal axis that reflects through the focus
· C) A ray parallel to the principal axis that reflects through the focus
· D) A ray passing through the center of curvature that reflects back along the same path
Answer: B
Description: Answer: A ray perpendicular to the principal axis that reflects through the focus। यह standard ray rule नहीं है। बाकी सभी rays image formation में उपयोग की जाती हैं। इसलिए सही उत्तर option B है
Q666. What will happen to a Hydra if it is cut into multiple pieces?
· A) Each piece will reproduce by budding
· B) Only the head part will grow into a complete individual
· C) Each piece will regenerate to form new individuals
· D) All pieces will die immediately
Answer: C
Description: Answer: Each piece will regenerate to form new individuals। Hydra में regeneration की क्षमता होती है, इसलिए प्रत्येक टुकड़ा नया Hydra बना सकता है। इसलिए सही उत्तर option C है
Q667. Which of the following is the SI unit of weight?
· A) Pascal
· B) Kilogram
· C) Newton
· D) Joule
Answer: C
Description: Answer: Newton। Weight एक force है और force की SI unit Newton होती है। इसलिए सही उत्तर option C है
Q668. Which of the following statements is true for a velocity-time graph of uniform velocity?
· A) Slope = Acceleration ≠ 0
· B) The graph is a curve
· C) Area under curve = speed, not displacement
· D) Slope = Acceleration = 0
Answer: D
Description: Answer: Slope = Acceleration = 0। Uniform velocity में velocity constant रहती है, इसलिए acceleration zero होती है और v-t graph की slope भी zero होती है। इसलिए सही उत्तर option D है
Q669. Which of the following correctly describes an ion?
· A) A molecule that has gained or lost neutrons
· B) A neutral molecule formed by ionic bonding
· C) An atom or group of atoms with a net electric charge
· D) An atom with more protons than neutrons
Answer: C
Description: Answer: An atom or group of atoms with a net electric charge। Ion वह atom या atoms का समूह है जिसमें net positive या negative charge होता है। इसलिए सही उत्तर option C है
Q670. Ethanol is miscible with water due to presence of which functional group?
· A) Carboxyl group
· B) Carbon chain
· C) Double bond
· D) Hydroxyl group
Answer: D
Description: Answer: Hydroxyl group। Ethanol में उपस्थित hydroxyl (-OH) group hydrogen bonding करता है, जिससे यह पानी में घुल जाता है। इसलिए सही उत्तर option D है
Q671. What is formed when ethanol is oxidised using an oxidising agent like alkaline KMnO₄?
· A) Acetone
· B) Ethanoic acid
· C) Methane
· D) Methanoic acid
Answer: B
Description: Answer: Ethanoic acid। Ethanol के oxidation से ethanoic acid (acetic acid) बनता है। इसलिए सही उत्तर option B है
Q672. In mitosis, how do the chromosomes in daughter cells compare with those in the parent cell?
· A) Daughter cells have the same number of chromosomes as the parent cell
· B) Daughter cells lose all chromosomes during division
· C) Daughter cells contain twice the number of chromosomes as the parent cell
· D) Daughter cells have half the number of chromosomes as the parent cell
Answer: A
Description: Answer: Daughter cells have the same number of chromosomes as the parent cell। Mitosis equational division है जिसमें chromosome number समान रहता है। इसलिए सही उत्तर option A है
Q673. If the direction of current in a conductor is reversed, the direction of force on it will:
· A) become zero
· B) reverse
· C) remain the same
· D) double
Answer: B
Description: Answer: reverse। Magnetic field में current carrying conductor पर लगने वाला force current की दिशा पर निर्भर करता है। Current उलटने पर force की दिशा भी उलट जाती है। इसलिए सही उत्तर option B है
Q674. In the chlor-alkali process, what is given off at the anode?
· A) Sodium Hydroxide
· B) Chlorine gas
· C) Hydrogen gas
· D) Nitrogen gas
Answer: B
Description: Answer: Chlorine gas। Chlor-alkali process में brine के electrolysis के दौरान anode पर chlorine gas निकलती है। इसलिए सही उत्तर option B है
Q675. Which of the following methods is used to separate particles from a suspension?
· A) Evaporation
· B) Filtration
· C) Crystallization
· D) Distillation
Answer: B
Description: Answer: Filtration। Suspension के बड़े particles को filter paper द्वारा अलग किया जा सकता है। इसलिए सही उत्तर option B है
Q676. What is the geometric relationship between the principal axis and the reflecting surface of a spherical mirror at the point of the pole P?
· A) The principal axis is tangent to the mirror surface
· B) The principal axis is parallel to the mirror surface
· C) The principal axis is normal (perpendicular) to the mirror at its pole
· D) The principal axis intersects the mirror at an oblique angle
Answer: C
Description: Answer: The principal axis is normal (perpendicular) to the mirror at its pole। Principal axis pole पर mirror surface के perpendicular होती है। इसलिए सही उत्तर option C है
Q677. Which of the following is the correct function of the Golgi body in a plant cell?
· A) Maintaining the shape of the cell
· B) Supporting the formation of lysosomes
· C) Providing protection to the cell
· D) Helping in the synthesis of proteins
Answer: B
Description: Answer: Supporting the formation of lysosomes। Golgi body packaging और secretion के साथ lysosomes के निर्माण में सहायता करती है। इसलिए सही उत्तर option B है
Q678. Which one of the following is an advantage of vegetative propagation in flowering plants?
· A) They can show completely new characters than those produced by seeds
· B) They are completely different from their parent plants
· C) They can flower and fruit later than those produced by seeds
· D) They can flower and fruit earlier than those produced by seeds
Answer: D
Description: Answer: They can flower and fruit earlier than those produced by seeds। Vegetative propagation से बने plants जल्दी mature होते हैं और जल्दी flower तथा fruit देते हैं। इसलिए सही उत्तर option D है
Q679. Match the following correctly.
· A) A-2; B-3; C-4; D-1
· B) A-3; B-4; C-1; D-2
· C) A-1; B-2; C-3; D-4
· D) A-4; B-1; C-2; D-3
Answer: C
Description: Answer: A-1; B-2; C-3; D-4। Correct matching: Litmus paper → detect acids and bases, Washing soda → soften hard water, Bleaching powder → bleaching agent, Soap solution → cleansing agent। इसलिए सही उत्तर option C है
Q680. The metal which will NOT displace lead from its salt solution is:
· A) Copper
· B) Aluminium
· C) Calcium
· D) Magnesium
Answer: A
Description: Answer: Copper। Activity series में copper, lead से नीचे होता है इसलिए वह lead को उसके salt solution से displace नहीं कर सकता। इसलिए सही उत्तर option A है
Q681. Which of the following is a result of increasing the pressure on a gas?
· A) Increase in inter-particle space
· B) Increase in kinetic energy
· C) Decrease in inter-particle space
· D) Evaporation of the gas
Answer: C
Description: Answer: Decrease in inter-particle space। Gas पर pressure बढ़ाने से particles एक-दूसरे के करीब आ जाते हैं, जिससे inter-particle space कम हो जाती है। इसलिए सही उत्तर option C है
Q682. The nature of the bond formed in aliphatic carbon compounds is:
· A) hydrogen
· B) covalent
· C) ionic
· D) coordinate
Answer: B
Description: Answer: covalent। Carbon compounds सामान्यतः electron sharing द्वारा covalent bond बनाते हैं। इसलिए सही उत्तर option B है
Q683. The filament of a light bulb is made up of tungsten, because of its ______.
· A) Low resistance and high melting point
· B) Low resistance and low melting point
· C) High resistance and high melting point
· D) High resistance and low melting point
Answer: C
Description: Answer: High resistance and high melting point। Tungsten का melting point बहुत अधिक होता है और इसका resistance भी अधिक होता है, इसलिए यह bulb filament के लिए उपयुक्त है। इसलिए सही उत्तर option C है
Q684. What is the name of the long, fibre-like part of a neuron that carries signals away from the cell body?
· A) Axon
· B) Synapse
· C) Nucleus
· D) Dendrite
Answer: A
Description: Answer: Axon। Axon nerve impulses को cell body से दूर अन्य neurons या muscles तक पहुँचाता है। इसलिए सही उत्तर option A है
Q685. Which type of muscle is voluntary and shows light and dark bands?
· A) Smooth muscle
· B) Cardiac muscle
· C) Unstriated muscle
· D) Striated muscle
Answer: D
Description: Answer: Striated muscle। Striated muscles voluntary muscles होती हैं और इनमें light तथा dark bands दिखाई देते हैं। इसलिए सही उत्तर option D है
Q686. 2-methylpropane has the same molecular formula as that of which of the following?
· A) Pentane
· B) Butane
· C) Butene
· D) Pentene
Answer: B
Description: Answer: Butane। 2-methylpropane और butane दोनों का molecular formula C₄H₁₀ है, इसलिए ये isomers हैं। इसलिए सही उत्तर option B है
Q687. In a parallel combination of resistors, which of the following quantities remains the same across all the resistors?
· A) The potential difference (V)
· B) The power consumed (P)
· C) The electric current (I)
· D) The equivalent resistance (Req)
Answer: A
Description: Answer: The potential difference (V)। Parallel circuit में प्रत्येक resistor के across voltage समान रहता है, जबकि current अलग-अलग हो सकता है। इसलिए सही उत्तर option A है
Q688. When an iron nail is placed in copper sulphate solution, what is observed?
· A) No reaction occurs
· B) Copper dissolves and iron deposits on the nail
· C) Iron dissolves and copper deposits on the nail
· D) Hydrogen gas is evolved
Answer: C
Description: Answer: Iron dissolves and copper deposits on the nail। Iron, copper से अधिक reactive है इसलिए वह copper sulphate solution से copper को displace कर देता है। इसलिए सही उत्तर option C है
Q689. A 7 V battery is connected in series with five resistors: 0.1 Ω, 0.4 Ω, 0.5 Ω, 0.6 Ω and 12.4 Ω. What is the current flowing through the 12.4 Ω resistor?
· A) 0.75 A
· B) 2 A
· C) 0.5 A
· D) 1 A
Answer: C
Description: Answer: 0.5 A। Total resistance = 0.1 + 0.4 + 0.5 + 0.6 + 12.4 = 14 Ω। Current I = V/R = 7/14 = 0.5 A। Series circuit में सभी resistors में current समान होता है। इसलिए सही उत्तर option C है
Q690. What is the function of salivary amylase present in human saliva?
· A) It converts proteins into amino acids
· B) It converts starch into simple sugars
· C) It converts amino acids into protein
· D) It converts simple sugars into starch
Answer: B
Description: Answer: It converts starch into simple sugars। Salivary amylase starch के digestion की शुरुआत करके उसे simple sugars में बदलता है। इसलिए सही उत्तर option B है
Q691. Which of the following is true for mitosis but not for meiosis?
· A) Promotes genetic variation
· B) Produces identical daughter cells
· C) Results in haploid cells
· D) Occurs in reproductive cells
Answer: B
Description: Answer: Produces identical daughter cells। Mitosis में genetically identical daughter cells बनती हैं, जबकि meiosis variation उत्पन्न करता है। इसलिए सही उत्तर option B है
Q692. Read the given assertion (A) and reason (R) and select the most appropriate option. (A): Oral contraceptive pills are a permanent method of contraception. (R): They change hormone levels and prevent ovulation.
· A) Both A and R are false
· B) Both A and R are true, but R is not the correct explanation of A
· C) A is false, but R is true
· D) Both A and R are true, and R is the correct explanation of A
Answer: C
Description: Answer: A is false, but R is true। Oral contraceptive pills temporary method of contraception हैं, permanent नहीं। लेकिन वे hormone levels बदलकर ovulation को रोकती हैं। इसलिए सही उत्तर option C है
Q693. In graphite, each carbon atom is bonded to three other carbon atoms in the same plane giving a _______ array.
· A) tetragonal
· B) pentagonal
· C) square pyramidal
· D) hexagonal
Answer: D
Description: Answer: hexagonal। Graphite में carbon atoms hexagonal layered structure बनाते हैं। इसलिए सही उत्तर option D है
Q694. If a device is rated 90 W at 120 V, the current drawn is ________.
· A) 0.75 A
· B) 1.50 A
· C) 1.33 A
· D) 0.25 A
Answer: A
Description: Answer: 0.75 A। Power formula P = VI। इसलिए I = P/V = 90/120 = 0.75 A। इसलिए सही उत्तर option A है
Q695. Which among the following is NOT a physical characteristic of ionic compounds?
· A) Insoluble in water
· B) Conducts electricity in molten state
· C) High boiling point
· D) High melting point
Answer: A
Description: Answer: Insoluble in water। अधिकांश ionic compounds पानी में soluble होते हैं। इसलिए 'insoluble in water' सही characteristic नहीं है। इसलिए सही उत्तर option A है
Q696. What is the correct definition of atomic mass?
· A) It is the mass of one atom in kilograms
· B) It is the mass of one hydrogen molecule
· C) It is the mass of an atom in grams
· D) It is the mass relative to carbon-12 atom
Answer: D
Description: Answer: It is the mass relative to carbon-12 atom। Atomic mass को carbon-12 atom के mass के 1/12 भाग के सापेक्ष व्यक्त किया जाता है। इसलिए सही उत्तर option D है
Q697. Which of the following statements is
· A) Only A and B
· B) Only C
· C) Only A
· D) Only B and C
Answer: A
Description: Answer: Only A and B। CaCl₂ का formula unit mass = 40 + (35.5 × 2) = 111 u। Formula unit mass की गणना molecular mass की तरह ही की जाती है। इसलिए सही उत्तर option A है
Q698. A car's velocity-time graph is a straight line parallel to the x-axis at 40 km
· A) Average speed of the car
· B) Acceleration of the car
· C) Final velocity of the car
· D) Displacement of the car in 3 hours
Answer: D
Description: Answer: Displacement of the car in 3 hours। Velocity-time graph के नीचे का area displacement को दर्शाता है। इसलिए सही उत्तर option D है
Q699. Which of the following statements about a proton is correct?
· A) A proton is neutral in charge and has mass equal to an electron
· B) A proton is positively charged and its mass is taken as one unit
· C) A proton is positively charged and mass is 1/2000 of a hydrogen atom
· D) A proton is negatively charged and has very small mass
Answer: B
Description: Answer: A proton is positively charged and its mass is taken as one unit। Proton पर positive charge होता है और इसकी relative mass लगभग 1 u मानी जाती है। इसलिए सही उत्तर option B है
Q700. A gardener wants to grow stronger plants with better fruit. Which pollination method should they encourage?
· A) Test Pollination
· B) Cross-pollination
· C) Self-pollination
· D) Geitonogamy
Answer: B
Description: Answer: Cross-pollination। Cross-pollination genetic variation बढ़ाती है, जिससे plants अधिक मजबूत और बेहतर quality के fruits उत्पन्न करते हैं। इसलिए सही उत्तर option B है
Quiz 01: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 001 to 100Q
Quiz 02: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 101 to 200Q
Quiz 03: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 201 to 300Q
Quiz 04: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 301 to 400Q
Quiz 05: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 401 to 500Q
Quiz 06: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 501 to 600Q
Quiz 07: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 601 to 700Q
Quiz 08: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 701 to 800Q
Quiz 09: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 801 to 900Q
Quiz 10: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 901 to 1000Q
Quiz 11: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1001 - 1100Q
Quiz 12: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1101 - 1200Q
Quiz 13: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1201 - 1300Q
Quiz 14: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1301 - 1400Q
Quiz 15: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1401 - 1500Q
Quiz 16: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1501 - 1600Q
Quiz 17: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1601 - 1700Q
Quiz 18: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1701 - 1800Q
Quiz 19: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1801 - 1900Q
Quiz 20: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 1901 - 2000Q
Quiz 21: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2001 - 2100Q
Quiz 22: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2101 - 2200Q
Quiz 23: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2201 - 2300Q
Quiz 24: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2301 - 2400Q
Quiz 25: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2401 - 2500Q
Quiz 26: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2501 - 2600Q
Quiz 27: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2601 - 2700Q
Quiz 28: RRB GROUP-D LEVEL-1 2025-26 CBT GENERAL SCIENCE (LINK) 2701 - 2800Q
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