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Q-901 Which of the following may lead to biological magnification? / निम्नलिखित में से कौन biological magnification का कारण बन सकता है?
A) Degrading vegetables
B) Straw
C) Peel of banana
D) Pesticides
Answer: D
Description: Pesticides, pesticides food chain में accumulate होकर biological magnification उत्पन्न करते हैं।
Q-902 The image formed by a concave lens for an object at infinity is? / concave lens द्वारा infinity पर रखे object की image कैसी बनती है?
A) virtual, inverted, and diminished
B) virtual, erect, and point-sized
C) real, inverted, and large
D) real, erect, and magnified
Answer: B
Description: virtual, erect, and point-sized, concave lens infinity के object की image focus पर point-sized बनाता है।
Q-903 Which statement best describes an olfactory indicator? / olfactory indicator को कौन-सा statement सबसे अच्छी तरह describe करता है?
A) A solid that dissolves in both acids and bases
B) A substance that changes smell in acids and bases
C) A liquid that changes colour in all solutions
D) A gas that reacts only with strong acids
Answer: B
Description: A substance that changes smell in acids and bases, olfactory indicators acidic और basic media में अलग smell देते हैं।
Q-904 What distinguishes rough ER (RER) from smooth ER (SER)? / rough ER और smooth ER में मुख्य अंतर क्या है?
A) Presence of ribosomes on RER, absence on SER
B) Absence of membranes in RER, presence in SER
C) Presence of chlorophyll on RER, absence on SER
D) Absence of proteins in RER, presence in SER
Answer: A
Description: Presence of ribosomes on RER, absence on SER, rough ER पर ribosomes होते हैं जबकि smooth ER पर नहीं होते।
Q-905 An object is placed 30 cm in front of a concave mirror of focal length 15 cm. What will be the image distance v? / concave mirror के सामने 30 cm पर object और focal length 15 cm होने पर image distance क्या होगा?
A) –15 cm
B) –30 cm
C) +30 cm
D) +15 cm
Answer: B
Description: –30 cm, mirror formula 1/f = 1/v + 1/u में f = –15 cm और u = –30 cm रखने पर v = –30 cm प्राप्त होता है।
Q-906 For a distinct echo to be heard, the minimum time interval between the original sound and the reflected sound should be approximately ________. / स्पष्ट echo सुनने के लिए original और reflected sound के बीच न्यूनतम समय कितना होना चाहिए?
A) 1 s
B) 0.5 s
C) 0.01 s
D) 0.1 s
Answer: D
Description: 0.1 s, मानव कान लगभग 0.1 second के बाद आने वाली reflected sound को अलग echo के रूप में सुन सकता है।
Q-907 Which of the following statements about average velocity is NOT correct? / average velocity के बारे में कौन-सा statement सही नहीं है?
A) It depends on the direction of motion
B) It is measured in m/s
C) It is always the same as average speed
D) It is the total displacement divided by total time
Answer: C
Description: It is always the same as average speed, average velocity और average speed हमेशा समान नहीं होते।
Q-908 Which metal lies between magnesium and iron in the activity series? / activity series में magnesium और iron के बीच कौन-सी metal आती है?
A) Silver
B) Zinc
C) Copper
D) Potassium
Answer: B
Description: Zinc, activity series में magnesium के बाद zinc और फिर iron आता है।
Q-909 Which of the following conditions will increase the rate of evaporation of a liquid? / निम्नलिखित में से कौन-सी condition evaporation की rate बढ़ाएगी?
A) Decrease in temperature
B) Increase in humidity
C) Decrease in surface area
D) Increase in wind speed
Answer: D
Description: Increase in wind speed, wind speed बढ़ने पर vapour particles तेजी से हटते हैं जिससे evaporation बढ़ती है।
Q-910 For the life processes, the transfer of a source of energy from outside the body of the organism is called ________. / life processes के लिए organism के बाहर से energy source प्राप्त करने की प्रक्रिया क्या कहलाती है?
A) digestion
B) excretion
C) nutrition
D) respiration
Answer: C
Description: nutrition, nutrition द्वारा organisms बाहर से food और energy प्राप्त करते हैं।
Q-911 Which of the following is considered a major factor contributing to poor living standards in society? / समाज में poor living standards का प्रमुख कारण क्या माना जाता है?
A) Overuse of technology in urban areas
B) Only the rapid growth of the population
C) Only the level of education in society
D) Inequality in the distribution of resources
Answer: D
Description: Inequality in the distribution of resources, resources का असमान वितरण poor living standards का प्रमुख कारण है।
Q-912 Waste generated by developing human embryo is removed with the help of which of the following organs? / developing human embryo द्वारा उत्पन्न waste किस organ की सहायता से हटाया जाता है?
A) Scrotum
B) Fallopian tube
C) Placenta
D) Ovaries
Answer: C
Description: Placenta, placenta embryo और mother के बीच पदार्थों के exchange का कार्य करता है।
Q-913 From the given alternatives, which method of asexual reproduction involves the formation of a new plant from the broken portion of the parent plant? / निम्नलिखित में से कौन-सी asexual reproduction method parent plant के टूटे हुए भाग से नया plant बनाती है?
A) Fertilisation
B) Fragmentation
C) Binary fission
D) Spore formation
Answer: B
Description: Fragmentation, fragmentation में parent body के टूटे हुए भाग से नया organism बनता है।
Q-914 From a distance-time graph, an object moves from point A to point B, covering a distance s₂ – s₁ in time t₂ – t₁. Which of the following correctly represents the speed v of the object? / distance-time graph में object की speed का सही formula कौन-सा है?
A) v = (t₂ − t₁)/(s₂ − s₁)
B) v = (s₂ − s₁)/(t₂ − t₁)
C) v = (s₂ − s₁)(t₂ − t₁)
D) v = (s₁ − s₂)(t₁ − t₂)
Answer: B
Description: v = (s₂ − s₁)/(t₂ − t₁), speed = distance travelled ÷ time taken।
Q-915 ___________ is or are NOT selectively re-absorbed from the filtrate in the nephron. / nephron में filtrate से कौन-सा पदार्थ selectively reabsorb नहीं होता?
A) Salts
B) Urea
C) Glucose
D) Amino acids
Answer: B
Description: Urea, urea मुख्य waste product है जो urine के साथ बाहर निकलता है।
Q-916 In a concave mirror, a ray of light directed towards the principal focus after reflection ________. / concave mirror में principal focus की ओर जाने वाली light ray reflection के बाद ________.
A) Diverges away from the axis
B) Becomes parallel to the principal axis
C) Passes through the center of curvature
D) Retraces its path
Answer: B
Description: Becomes parallel to the principal axis, focus से गुजरने वाली ray reflection के बाद principal axis के समानांतर हो जाती है।
Q-917 If an object is at infinity in front of a convex lens, the image is formed ________. / convex lens के सामने object infinity पर होने पर image कहाँ बनती है?
A) at F
B) between F and 2F
C) at infinity
D) at 2F
Answer: A
Description: at F, infinity पर स्थित object की image convex lens के focus पर बनती है।
Q-918 What is the correct sequence of steps followed in extracting metals like zinc from their sulphide or carbonate ores? / zinc जैसे metals को sulphide या carbonate ores से निकालने की सही प्रक्रिया क्या है?
A) Electrolysis → Roasting → Purification
B) Dissolution in acid → Filtration → Heating
C) Roasting or calcination → Reduction to metal → Purification
D) Direct heating → Purification
Answer: C
Description: Roasting or calcination → Reduction to metal → Purification, metallurgy में यही सामान्य sequence अपनाया जाता है।
Q-919 Which of the following conditions will NOT increase the rate of evaporation? / निम्नलिखित में से कौन-सी condition evaporation की rate नहीं बढ़ाएगी?
A) Increased Temperature
B) Decreased Wind Speed
C) Increased Surface Area
D) Decreased Humidity
Answer: B
Description: Decreased Wind Speed, wind speed कम होने पर evaporation की rate कम होती है।
Q-920 The stethoscope works on which principle? / stethoscope किस principle पर कार्य करता है?
A) Diffraction of sound
B) Dispersion of sound
C) Multiple reflection of sound
D) Refraction of sound
Answer: C
Description: Multiple reflection of sound, stethoscope में sound waves multiple reflections द्वारा amplify होती हैं।
Q-921 If the speed of sound in air is 344 m/s, what is the minimum distance required for an observer to hear a distinct echo? / यदि हवा में sound की speed 344 m/s हो तो distinct echo सुनने के लिए न्यूनतम दूरी कितनी होनी चाहिए?
A) 344 m
B) 17.2 m
C) 0.1 m
D) 34.4 m
Answer: B
Description: Echo सुनने के लिए minimum time gap 0.1 s चाहिए, इसलिए distance = 344 × 0.1 ÷ 2 = 17.2 m।
Q-922 Which of the following statements correctly describes the relationship between mass and inertia? / mass और inertia के बीच संबंध को कौन-सा statement सही बताता है?
A) Mass is directly proportional to the square of inertia
B) Mass is independent of inertia
C) Mass is directly proportional to inertia
D) Mass is inversely proportional to inertia
Answer: C
Description: Mass is directly proportional to inertia, किसी object का mass जितना अधिक होगा उसकी inertia उतनी अधिक होगी।
Q-923 Which of the following cells change shape by changing the amount of water in them? / निम्नलिखित में से कौन-सी cells पानी की मात्रा बदलकर अपना shape बदलती हैं?
A) Striated muscle cell
B) Smooth muscle cell
C) Plant cell
D) Cardiac muscle cell
Answer: C
Description: Plant cell, plant cells में turgor pressure के कारण shape में परिवर्तन हो सकता है।
Q-924 If a cell lacks a functional Golgi complex, it would mainly fail in __________. / यदि किसी cell में functional Golgi complex न हो तो वह मुख्यतः किस कार्य में असफल होगी?
A) protein synthesis only
B) controlling cell division
C) formation of ATP
D) packaging and secretion
Answer: D
Description: packaging and secretion, Golgi apparatus पदार्थों की packaging और secretion का कार्य करता है।
Q-925 The resistance of a metallic conductor increases with ________. / metallic conductor का resistance किसके बढ़ने पर बढ़ता है?
A) Increase in temperature
B) Increase in cross-sectional area
C) Decrease in temperature
D) Decrease in length
Answer: A
Description: Increase in temperature, metallic conductors में temperature बढ़ने पर resistance बढ़ता है।
Q-926 For a body moving with uniform velocity, the acceleration is ________. / uniform velocity से moving body का acceleration क्या होता है?
A) zero
B) constant
C) increasing
D) decreasing
Answer: A
Description: zero, uniform velocity में velocity change नहीं होती इसलिए acceleration zero होता है।
Q-927 Which cells in xylem are primarily responsible for the vertical transport of water and minerals in plants? / xylem में कौन-सी cells water और minerals के vertical transport के लिए मुख्य रूप से जिम्मेदार हैं?
A) Sieve tubes
B) Xylem fibres
C) Companion cells
D) Tracheids and vessels
Answer: D
Description: Tracheids and vessels, ये xylem के conducting elements होते हैं।
Q-928 A sound wave has a frequency of 1600 Hz. If the wavelength of the wave is 0.2 m, what will be the speed of the wave? / किसी sound wave की frequency 1600 Hz और wavelength 0.2 m है, तो उसकी speed क्या होगी?
A) 32 m/s
B) 8000 m/s
C) 800 m/s
D) 320 m/s
Answer: D
Description: wave speed v = f × λ = 1600 × 0.2 = 320 m/s।
Q-929 Which of the following statements regarding the need for macronutrients in plants is correct? / plants में macronutrients की आवश्यकता के बारे में कौन-सा statement सही है?
A) Macronutrients are not required by plants at all
B) Macronutrients are required by plants in large quantities
C) Macronutrients are needed only during flowering
D) Macronutrients are harmful to plants if absorbed
Answer: B
Description: Macronutrients are required by plants in large quantities, plants को growth के लिए macronutrients अधिक मात्रा में चाहिए होते हैं।
Q-930 Which of the following statements is or are correct regarding indicator? / indicators के बारे में कौन-से statements सही हैं?
a) Turmeric is a natural indicator used for acid base titration
b) Phenolphthalein is colourless in basic medium and gives pink colour in acidic medium
c) Clove oil is categorised as olfactory indicator
A) Only a
B) a and c
C) b and c
D) Only b
Answer: B
Description: a and c, turmeric natural indicator है और clove oil एक olfactory indicator है, जबकि phenolphthalein acidic medium में colourless और basic medium में pink होता है।
Q-931 The symbol of a battery is ________. / battery का symbol क्या होता है?
A) several cells joined together
B) one long and one short line
C) a rectangle with arrows
D) a circle with a dot
Answer: A
Description: several cells joined together, battery कई cells के combination से बनती है।
Q-932 A sound wave has a frequency of 250 Hz. The time taken for one complete vibration is ________. / किसी sound wave की frequency 250 Hz है, एक complete vibration में कितना समय लगेगा?
A) 0.25 s
B) 0.40 s
C) 0.004 s
D) 4.0 s
Answer: C
Description: time period T = 1 ÷ f = 1 ÷ 250 = 0.004 s।
Q-933 Which of the following is an advantage of vegetative propagation? / vegetative propagation का कौन-सा लाभ है?
A) All new plants are genetically different from the parent
B) It requires cross-pollination to occur
C) It allows propagation of seedless plants such as banana
D) Plants grown this way take longer to bear fruits
Answer: C
Description: It allows propagation of seedless plants such as banana, vegetative propagation द्वारा seedless plants को उगाया जा सकता है।
Q-934 When an object falls freely near the Earth, the direction of its motion ________. / जब कोई object पृथ्वी के पास freely fall करता है तो उसकी motion की direction ________।
A) remains the same
B) becomes opposite to gravity
C) becomes horizontal
D) changes continuously
Answer: A
Description: remains the same, free fall में object gravity की दिशा में नीचे की ओर चलता है।
Q-935 Which substances are selectively reabsorbed in the nephron? / nephron में कौन-से substances selectively reabsorbed होते हैं?
A) Platelets and enzymes
B) Urea and carbon dioxide
C) Bile and hydrochloric acid
D) Glucose amino acids and water
Answer: D
Description: Glucose amino acids and water, nephron उपयोगी substances को पुनः absorb करता है।
Q-936 Which of the following statements about epithelial tissue is correct? / epithelial tissue के बारे में कौन-सा statement सही है?
A) Epithelial tissue cells have large intercellular spaces and form a loose sheet
B) Epithelial tissue does not play any role in material exchange in the body
C) Epithelial tissue mainly connects bones and muscles
D) Epithelial tissue forms a protective covering and regulates material exchange
Answer: D
Description: Epithelial tissue forms a protective covering and regulates material exchange, epithelial tissue protection और exchange का कार्य करती है।
Q-937 The __________ is a dark spherical structure in the cell surrounded by a __________ membrane with pores for material exchange. / cell में dark spherical structure कौन-सा है जो pores वाली membrane से घिरा होता है?
A) vacuole single
B) nucleoid double
C) nucleoid single
D) nucleus double
Answer: D
Description: nucleus double, nucleus double membrane से घिरा होता है जिसमें pores पाए जाते हैं।
Q-938 Which of the following is true about infrasonic sound? / infrasonic sound के बारे में कौन-सा statement सही है?
A) Frequency > 20 kHz
B) Frequency < 20 Hz
C) Cannot travel in air
D) Frequency between 20 Hz and 20 kHz
Answer: B
Description: Frequency < 20 Hz, infrasonic sound की frequency 20 Hz से कम होती है।
Q-939 Which of the following statements is NOT correct? / निम्नलिखित में से कौन-सा statement सही नहीं है?
A) In a prism dispersion can occur if white light is used
B) The angle of deviation is the angle between the incident ray and emergent ray
C) In a prism the incident ray and emergent ray are always parallel
D) In a prism the emergent ray bends towards the base of the prism when the incident ray is coming from the base side
Answer: C
Description: In a prism the incident ray and emergent ray are always parallel, prism में incident और emergent rays सामान्यतः parallel नहीं होतीं।
Q-940 Why are micro-nutrients important for plants? / plants के लिए micronutrients क्यों महत्वपूर्ण हैं?
A) They help in the absorption of sunlight
B) They increase the size of the plant roots
C) They are only needed for decorative plants
D) They support essential functions even in small amounts
Answer: D
Description: They support essential functions even in small amounts, micronutrients कम मात्रा में आवश्यक biological functions को support करते हैं।
Q-941 Which statement correctly defines the process of evaporation? / evaporation process को कौन-सा statement सही प्रकार से define करता है?
A) It requires the liquid to freeze before changing to the gas form
B) It changes solids directly into vapors upon heating strongly
C) It changes a liquid to gas from the surface below boiling point
D) It takes place only at the boiling temperature of a liquid
Answer: C
Description: It changes a liquid to gas from the surface below boiling point, evaporation surface phenomenon है जो boiling point से कम temperature पर भी होती है।
Q-942 Why does the uterine lining become thick and spongy every month? / uterus की lining हर महीने thick और spongy क्यों हो जाती है?
A) To absorb nutrients
B) To support egg development
C) To nourish the embryo if fertilisation occurs
D) To prevent menstruation
Answer: C
Description: To nourish the embryo if fertilisation occurs, fertilisation होने पर embryo को nourishment देने के लिए uterine lining मोटी हो जाती है।
Q-943 A man's pitch is _____ than child's pitch. / पुरुष की pitch बच्चे की तुलना में _____ होती है।
A) sometimes higher and sometimes lower
B) lower
C) higher
D) same
Answer: B
Description: lower, पुरुष की vocal cords लंबी होने के कारण उसकी pitch कम होती है।
Q-944 Lenses are used in spectacles to correct vision because they work on the principle of __________. / spectacles में lenses vision correction के लिए किस principle पर कार्य करते हैं?
A) Reflection
B) Polarization
C) Refraction
D) Diffraction
Answer: C
Description: Refraction, lenses light को refract करके vision correct करते हैं।
Q-945 Which of the following symbols represents a rheostat? / निम्नलिखित में से कौन-सा symbol rheostat को दर्शाता है?
A) An A inside a circle
B) A zigzag line with an arrow which is drawn across it
C) A zigzag line
D) A circle with a V inside it
Answer: B
Description: A zigzag line with an arrow which is drawn across it, यही rheostat का circuit symbol है।
Q-946 Which of the following statements about cell size is correct? / cell size के बारे में कौन-सा statement सही है?
A) Cell size is related to its function not the size of the organism
B) All cells are of the same size in all organisms
C) Cell size is always large in multicellular organisms
D) Cell size depends on the number of nuclei
Answer: A
Description: Cell size is related to its function not the size of the organism, cell का आकार उसके कार्य पर निर्भर करता है।
Q-947 Formula unit mass is ________. / formula unit mass क्या होता है?
A) the sum of the number of electrons of all atoms in a formula unit of a compound
B) the sum of the number of protons of all atoms in a formula unit of a compound
C) the sum of the atomic number of all atoms in a formula unit of a compound
D) the sum of the atomic masses of all atoms in a formula unit of a compound
Answer: D
Description: the sum of the atomic masses of all atoms in a formula unit of a compound, formula unit mass compound के सभी atoms के atomic masses का योग होता है।
Q-948 Which of the following correctly describes the relation between frequency ν and time period T? / frequency और time period के बीच सही relation कौन-सा है?
A) ν + T = 1
B) νT = 0
C) ν/T = 1
D) νᵀ = 1
Answer: C
Description: frequency और time period एक-दूसरे के reciprocal होते हैं।
ν=T1
Q-949 Which functional group present in aldehyde? / aldehyde में कौन-सा functional group पाया जाता है?
A) -COOH
B) -CHO
C) -OH
D) -CO
Answer: B
Description: -CHO, aldehydes का characteristic functional group -CHO होता है।
Q-950 When an object is placed beyond the centre of curvature C of a concave mirror, the image formed is ________. / concave mirror में object को centre of curvature से आगे रखने पर image कैसी बनती है?
A) real inverted and smaller than the object
B) virtual erect and larger than the object
C) virtual inverted and larger than the object
D) real erect and same size as object
Answer: A
Description: real inverted and smaller than the object, object को C से आगे रखने पर image C और F के बीच diminished बनती है।
Q-951 Oxidation is defined as, oxidation को कैसे define किया जाता है
A) loss of electrons
B) loss of protons
C) gain of electrons
D) gain of neutrons
Answer: A
Description: oxidation में electrons का loss होता है।
Q-952 What are the two main properties of carbon that contribute to its versatile nature and its ability to form a large number of compounds, carbon की versatile nature और अधिक compounds बनाने की क्षमता के लिए कौन-सी दो मुख्य properties जिम्मेदार हैं
A) Catenation and tetravalency
B) Isomerism and allotropy
C) Good conductivity and sonorous nature
D) High melting point and ductility
Answer: A
Description: carbon की catenation और tetravalency उसे अनेक compounds बनाने में सक्षम बनाती हैं।
Q-953 For a resistor with constant resistance the magnitude of heat produced is directly proportional to which of the following, constant resistance वाले resistor में उत्पन्न heat किसके directly proportional होती है
A) Current flowing through the resistor
B) Density of the material
C) Length of the resistor
D) Square of the current flowing through the resistor
Answer: D
Description: Joule’s law के अनुसार H ∝ I²Rt।
Q-954 In the reaction CuO + H₂ → Cu + H₂O which substance is oxidised, reaction CuO + H₂ → Cu + H₂O में कौन-सा substance oxidised होता है
A) Copper oxide
B) Copper
C) Water
D) Hydrogen
Answer: D
Description: hydrogen oxygen प्राप्त करके water बनाता है इसलिए यह oxidised होता है।
Q-955 A retarding force of 10 N acts on a body, The work done due to this force is −200 J, What will be the magnitude and direction of the displacement of the body under the action of this force, 10 N का retarding force किसी body पर कार्य करता है और work done −200 J है, displacement का magnitude और direction क्या होगा
A) 20 m in the same direction as the force
B) 20 m opposite to the direction of the force
C) 2000 m opposite to the direction of the force
D) 2000 m in the same direction as the force
Answer: B
Description: W = Fs cosθ में negative work होने का अर्थ displacement force की opposite direction में है और s = 200 ÷ 10 = 20 m।
Q-956 Which type of muscle is found in the walls of internal organs like the stomach and intestines, stomach और intestines जैसे internal organs की walls में कौन-सी muscle पाई जाती है
A) Striated muscle
B) Smooth muscle
C) Skeletal muscle
D) Voluntary muscle
Answer: B
Description: internal organs की walls में involuntary smooth muscles पाई जाती हैं।
Q-957 A ray of light strikes a plane mirror at an angle of 30° with the normal, The angle between the incident ray and the reflected ray is, एक light ray plane mirror पर normal के साथ 30° का angle बनाती है, incident ray और reflected ray के बीच angle कितना होगा
A) 90°
B) 60°
C) 120°
D) 30°
Answer: B
Description: angle between incident ray and reflected ray = 2 × angle of incidence = 2 × 30° = 60°।
Q-958 Why is the female body specifically prepared every month for pregnancy, female body हर महीने pregnancy के लिए क्यों तैयार होती है
A) To improve blood circulation
B) To remove waste products
C) To nourish the potential embryo
D) To release more sperm
Answer: C
Description: fertilisation होने पर embryo को nourishment देने के लिए body तैयार होती है।
Q-959 A wire made of a certain material has a resistance of 12 Ω with length l and cross-sectional area A, What will be the resistance of another wire made of the same material but with length l/3 and cross-sectional area 2A, एक wire का resistance 12 Ω है जिसकी length l और area A है, उसी material की दूसरी wire जिसकी length l/3 और area 2A है उसका resistance क्या होगा
A) 4 Ω
B) 1 Ω
C) 0.5 Ω
D) 2 Ω
Answer: D
Description: resistance R ∝ l/A इसलिए नया resistance = 12 × 1/3 × 1/2 = 2 Ω।
Q-960 Which of the following statements is NOT correct about an electric circuit, electric circuit के बारे में कौन-सा statement सही नहीं है
A) Current flows in an open circuit
B) Current is a result of flow of electrons
C) A switch helps to open or close the circuit
D) The direction of conventional current is opposite to the flow of electrons
Answer: A
Description: open circuit में current flow नहीं करता।
Q-961 Herbicides protect crops by ________, herbicides crops की रक्षा कैसे करते हैं
A) Killing weeds
B) Killing fungi
C) Killing insects
D) Killing bacteria
Answer: A
Description: herbicides unwanted weeds को नष्ट करते हैं।
Q-962 Why do aquatic organisms breathe faster than terrestrial organisms, aquatic organisms terrestrial organisms की तुलना में तेज़ी से क्यों सांस लेते हैं
A) Because the amount of dissolved oxygen in water is very low
B) Because water exerts less resistance on breathing organs
C) Because they absorb oxygen directly from sunlight through gills
D) Because diffusion of oxygen in water is faster than in air
Answer: A
Description: पानी में dissolved oxygen कम होने के कारण aquatic organisms तेज़ी से सांस लेते हैं।
Q-963 A particle starts from rest and moves with uniform acceleration, Which of the following represents the correct velocity-time graph for the particle, कोई particle rest से start होकर uniform acceleration से move करता है, उसका velocity-time graph कैसा होगा
A) A straight line passing through the origin with negative slope
B) A parabola
C) A straight line passing through the origin with positive slope
D) A horizontal line
Answer: C
Description: uniform acceleration में velocity समान दर से बढ़ती है।
Q-964 If the power of a lens is –4 D, which of the following is true about the lens, यदि किसी lens की power –4 D है तो कौन-सा statement सही है
A) It is a concave lens of focal length 0.4 m
B) It is a convex lens of focal length 2.5 m
C) It is a concave lens of focal length 25 cm
D) It is a convex lens of focal length 25 cm
Answer: C
Description: focal length f = 1/P = 1/–4 = –0.25 m = –25 cm इसलिए यह concave lens है।
Q-965 Select the option that is true regarding the following two statements labelled Assertion A and Reason R, Assertion A Vasectomy leads to loss of sexual drive in males, Reason R It involves removal of the testes
A) Both A and R are false
B) Both A and R are true but R is not the correct explanation of A
C) Both A and R are true and R is the correct explanation of A
D) A is false but R is true
Answer: A
Description: vasectomy में testes remove नहीं किए जाते और इससे sexual drive पर प्रभाव नहीं पड़ता।
Q-966 Which of the following conditions will NOT favour evaporation, निम्नलिखित में से कौन-सी condition evaporation को favour नहीं करेगी
A) High Wind Speed
B) High Humidity
C) Low Humidity
D) High Temperature
Answer: B
Description: humidity अधिक होने पर evaporation की rate कम हो जाती है।
Q-967 Which of the chemical formulae represents bleaching powder, निम्नलिखित में से कौन-सा chemical formula bleaching powder को दर्शाता है
A) Ca₂(ClO)₂
B) Ca(ClO₂)
C) Ca(ClO)₂
D) Ca(ClO₂)₂
Answer: C
Description: bleaching powder का chemical formula Ca(ClO)₂ होता है।
Q-968 A body of mass 2 kg is moving with a velocity of 10 m/s, A force of 4 N is applied for 5 s, The final velocity is, 2 kg mass की body 10 m/s की velocity से चल रही है, उस पर 4 N force 5 s तक लगाया जाता है, अंतिम velocity क्या होगी
A) 35 m/s
B) 20 m/s
C) 15 m/s
D) 25 m/s
Answer: B
Description: acceleration a = F/m = 4/2 = 2 m/s² और v = u + at = 10 + 2 × 5 = 20 m/s।
Q-969 Each succeeding member of the homologous series of alkane differs from the previous one by a unit that consists of, alkane homologous series का प्रत्येक अगला member पिछले member से किस unit द्वारा differ करता है
A) one carbon and three hydrogens
B) two carbon and two hydrogens
C) one carbon and two hydrogens
D) two carbon and three hydrogens
Answer: C
Description: homologous series के successive members में CH₂ unit का अंतर होता है।
Q-970 In a laboratory a student mixes starch in water and observes that the mixture is neither a true solution nor a suspension, What property of this mixture confirms it is a colloidal solution, starch और water के mixture के colloidal solution होने की पहचान क्या है
A) The particles settle down after some time
B) The particles are visible to the naked eye
C) The particles scatter a beam of light but do not settle on standing
D) The mixture is completely transparent and does not scatter light
Answer: C
Description: colloidal particles Tyndall effect दिखाते हैं और settle नहीं होते।
Q-971 What does a blue non-luminous flame indicate when a hydrocarbon is burnt, hydrocarbon के जलने पर blue non-luminous flame क्या दर्शाती है
A) Lack of oxygen
B) Presence of unburnt carbon
C) Complete combustion with high temperature
D) Incomplete combustion and soot formation
Answer: C
Description: Complete combustion with high temperature, blue flame sufficient oxygen और complete combustion को दर्शाती है।
Q-972 What is the atomic mass of magnesium oxide, magnesium oxide का atomic mass कितना है
A) 32
B) 45
C) 40
D) 35
Answer: C
Description: 40, magnesium का atomic mass 24 और oxygen का 16 होता है इसलिए MgO = 24 + 16 = 40।
Q-973 In a starch test using a variegated leaf what is the purpose of adding iodine solution at the end, variegated leaf के starch test में अंत में iodine solution क्यों डाला जाता है
A) To identify the areas without chloroplasts
B) To stain the starch present in the leaf
C) To remove chlorophyll from green areas
D) To dissolve starch
Answer: B
Description: To stain the starch present in the leaf, iodine starch के साथ blue-black colour देता है।
Q-974 Which of the following is parenchyma type and present in aquatic plants with large air cavities to help them float, aquatic plants में large air cavities वाला कौन-सा parenchyma tissue पाया जाता है
A) Companion cell
B) Tracheid
C) Chlorenchyma
D) Aerenchyma
Answer: D
Description: Aerenchyma, aerenchyma में large air cavities होती हैं जो aquatic plants को float करने में मदद करती हैं।
Q-975 Which of the following statements is NOT correct, निम्नलिखित में से कौन-सा statement सही नहीं है
A) Loudness depends on frequency
B) Soft sound has small amplitude
C) Loudness depends on amplitude
D) Loud sound has large amplitude
Answer: A
Description: Loudness depends on frequency, loudness amplitude पर निर्भर करती है frequency पर नहीं।
Q-976 Spring balance A is attached at one end to spring balance B whose other end is fixed to a rigid support, A force is applied to the free end of spring balance A, Both balances show the same reading, What does this observation indicate, दो spring balances समान reading दिखाते हैं, यह क्या दर्शाता है
A) Both balances exert forces in the same direction
B) The force exerted by A on B is greater than that by B on A
C) The force exerted by A on B is equal and opposite to the force exerted by B on A
D) Only spring balance A exerts force on B
Answer: C
Description: The force exerted by A on B is equal and opposite to the force exerted by B on A, यह Newton’s third law को दर्शाता है।
Q-977 Which of the following best defines the concentration of a solution, solution की concentration को कौन-सा statement सही define करता है
A) The amount of solution present in a given amount of solute
B) The amount of solvent present in a given amount of solution
C) The amount of solute present in a given amount of solution
D) The amount of solvent present in a given amount of solute
Answer: C
Description: The amount of solute present in a given amount of solution, concentration solute की मात्रा को दर्शाती है।
Q-978 Which of the following statements about lysosomes is correct, lysosomes के बारे में कौन-सा statement सही है
A) Lysosomes synthesise fats
B) Lysosomes contain growth hormones
C) Lysosomes contain digestive enzymes
D) Lysosomes synthesise proteins
Answer: C
Description: Lysosomes contain digestive enzymes, lysosomes में digestive enzymes होते हैं जो intracellular digestion करते हैं।
Q-979 Two planets have the same radius, Planet A has twice the mass of Planet B, What is the ratio of acceleration due to gravity on Planet A to that on Planet B, दो planets का radius समान है और Planet A का mass Planet B से दोगुना है, तो acceleration due to gravity का ratio क्या होगा
A) 1 : 1
B) 2 : 1
C) 1 : 2
D) 4 : 1
Answer: B
Description: 2 : 1, g ∝ M/R² और दोनों planets का radius समान है इसलिए g mass के proportional होगा।
Q-980 Which of the following statements correctly describes image formation by a convex mirror, convex mirror द्वारा image formation को कौन-सा statement सही बताता है
A) When the object is at a finite distance the image is formed beyond the centre of curvature real and enlarged
B) When the object is at infinity the image is formed at the focus real and inverted
C) When the object is at infinity the image is formed at the pole and is real and inverted
D) When the object is at a finite distance the image is formed between the pole and focus virtual and diminished
Answer: D
Description: When the object is at a finite distance the image is formed between the pole and focus virtual and diminished, convex mirror हमेशा virtual diminished image बनाता है।
Q-981 Which of the following acid-base indicators is colourless in acidic medium and pink in basic medium, निम्नलिखित में से कौन-सा indicator acidic medium में colourless और basic medium में pink होता है
A) Methyl orange
B) Litmus
C) Phenolphthalein
D) Bromothymol blue
Answer: C
Description: Phenolphthalein, phenolphthalein acidic medium में colourless और basic medium में pink होता है।
Q-982 The hydrophilic end of a soap molecule is, soap molecule का hydrophilic end कैसा होता है
A) ionic and interacts with water
B) non-ionic and soluble in oil
C) neutral and non-polar
D) non-ionic and soluble in water
Answer: A
Description: ionic and interacts with water, hydrophilic end water के साथ interact करता है।
Q-983 Which of the following statements defines Formula Unit, निम्नलिखित में से कौन-सा statement Formula Unit को define करता है
A) Mass of an atom
B) Mass of one mole of a compound
C) Mass of one molecule
D) Sum of atomic masses of all atoms in the formula unit of an ionic compound
Answer: D
Description: Sum of atomic masses of all atoms in the formula unit of an ionic compound, formula unit ionic compound के सभी atoms के atomic masses का योग है।
Q-984 The gravitational force between the Earth and a body of mass m kg is F N, What will be the gravitational force between the body and the Earth if the mass of the body is increased to 4m kg, पृथ्वी और m kg mass की body के बीच gravitational force F है, यदि body का mass 4m हो जाए तो force कितना होगा
A) 4F N
B) F/2 N
C) F/4 N
D) F N
Answer: A
Description: 4F N, gravitational force mass के directly proportional होता है।
Q-985 Which property of carbon allows it to form a large number of compounds by bonding with itself and other elements, carbon की कौन-सी property उसे स्वयं और अन्य elements के साथ bond बनाकर अनेक compounds बनाने में सक्षम बनाती है
A) Tetravalency
B) Catenation
C) Isomerism
D) Combustion
Answer: B
Description: Catenation, carbon की catenation property उसे स्वयं के atoms के साथ long chains और rings बनाने में सक्षम बनाती है।
Q-986 Select the correct option regarding the following two statements labelled Assertion A and Reason R, Assertion A Zinc can displace copper from copper sulphate solution, Reason R Zinc is less reactive than copper
A) Both A and R are true and R is not the correct explanation of A
B) A is true but R is false
C) Both A and R are true and R is the correct explanation of A
D) A is false but R is true
Answer: B
Description: A is true but R is false, zinc copper से अधिक reactive होता है इसलिए वह copper sulphate solution से copper को displace कर सकता है।
Q-987 The gas released on the reaction of metal carbonate with hydrochloric acid turns lime water milky, The released gas is, metal carbonate और hydrochloric acid के reaction में निकलने वाली कौन-सी gas lime water को milky बनाती है
A) Hydrogen
B) Carbon monoxide
C) Carbon dioxide
D) Chlorine
Answer: C
Description: Carbon dioxide, carbon dioxide lime water के साथ reaction करके calcium carbonate बनाती है जिससे milky colour दिखाई देता है।
Q-988 Which method is used to extract metals that are high in the reactivity series, high reactivity series वाले metals को extract करने के लिए कौन-सी method प्रयोग की जाती है
A) Heating with carbon
B) Roasting
C) Calcination
D) Electrolytic reduction
Answer: D
Description: Electrolytic reduction, highly reactive metals को electrolysis द्वारा प्राप्त किया जाता है।
Q-989 A lens with a shorter focal length f has _______, कम focal length वाले lens की _______ होती है
A) More power
B) Zero power
C) Less power
D) Equal power as a lens with a longer focal length f
Answer: A
Description: More power, lens power P = 1/f इसलिए focal length कम होने पर power अधिक होती है।
Q-990 Which of the following structures is present at the surface of the rough endoplasmic reticulum membrane, rough endoplasmic reticulum की surface पर कौन-सी structure पाई जाती है
A) Chromosome
B) Plasma membrane
C) Cell wall
D) Ribosome
Answer: D
Description: Ribosome, rough endoplasmic reticulum की surface पर ribosomes जुड़े होते हैं।
Q-991 As the chest cavity becomes larger air is __________ into the lungs and fills the expanded __________, chest cavity बड़ी होने पर air lungs में __________ जाती है और expanded __________ को भर देती है
A) absorbed diaphragm
B) pushed bronchi
C) pulled alveoli
D) forced ribs
Answer: C
Description: pulled alveoli, chest cavity expand होने पर air lungs में खिंचती है और alveoli को भर देती है।
Q-992 What is the approximate pH of a salt solution formed from a strong acid and a strong base, strong acid और strong base से बने salt solution का approximate pH कितना होता है
A) Can be less than or greater than 7 depending on temperature
B) Less than 7
C) Equal to 7
D) Greater than 7
Answer: C
Description: Equal to 7, strong acid और strong base से बना salt सामान्यतः neutral होता है।
Q-993 Which statement best describes a homologous series of organic compounds, organic compounds की homologous series को कौन-सा statement सही describe करता है
A) A series of compounds with different functional groups but the same molecular formula
B) A series of compounds having the same general formula similar chemical properties and consecutive members differing by a −CH₂− group
C) A series of compounds that all have branched chains
D) A series of elements with similar physical properties
Answer: B
Description: A series of compounds having the same general formula similar chemical properties and consecutive members differing by a −CH₂− group, homologous series के consecutive members में CH₂ unit का अंतर होता है।
Q-994 What happens after fertilisation in a flowering plant, flowering plant में fertilisation के बाद क्या होता है
A) The ovule becomes a fruit and the ovary forms the seed
B) The entire flower dries up and falls off without forming any new structures
C) The petals and stamens become the seed and the ovary forms the embryo
D) The ovule becomes the seed and the ovary becomes the fruit
Answer: D
Description: The ovule becomes the seed and the ovary becomes the fruit, fertilisation के बाद ovule seed और ovary fruit में परिवर्तित हो जाती है।
Q-995 When an acid reacts with a metal carbonate which gas is typically produced, acid और metal carbonate के reaction में सामान्यतः कौन-सी gas बनती है
A) Hydrogen gas
B) Carbon dioxide gas
C) Oxygen gas
D) Nitrogen gas
Answer: B
Description: Carbon dioxide gas, acid और metal carbonate के reaction से carbon dioxide निकलती है।
Q-996 Which of the following is INCORRECT, निम्नलिखित में से कौन-सा statement गलत है
A) Buoyant force is maximum for fully submerged body
B) Buoyant force acts upwards
C) Buoyant force is independent of fluid density
D) Buoyant force = weight of fluid displaced
Answer: C
Description: Buoyant force is independent of fluid density, buoyant force fluid की density पर निर्भर करता है।
Q-997 Which process is used for the extraction of aluminium from bauxite, bauxite से aluminium निकालने के लिए कौन-सी process प्रयोग की जाती है
A) Displacement by zinc
B) Roasting followed by reduction
C) Electrolysis of molten aluminium oxide
D) Calcination followed by carbon reduction
Answer: C
Description: Electrolysis of molten aluminium oxide, aluminium को bauxite से electrolysis द्वारा प्राप्त किया जाता है।
Q-998 Which of the following characteristics is correct about magnetic field lines, magnetic field lines के बारे में कौन-सा statement सही है
A) They intersect each other
B) They always start and end at the same pole
C) They always form closed loops
D) They are open curves
Answer: C
Description: They always form closed loops, magnetic field lines closed loops बनाती हैं।
Q-999 The reaction NaOH + HCl → NaCl + H₂O is an example of, reaction NaOH + HCl → NaCl + H₂O किस प्रकार का reaction है
A) Displacement reaction
B) Double displacement reaction
C) Precipitation reaction
D) Decomposition reaction
Answer: B
Description: Double displacement reaction, acid और base के बीच ions के exchange से salt और water बनते हैं।
Q-1000 Approximately what percentage of energy is transferred from one trophic level to the next in an ecosystem, ecosystem में एक trophic level से अगले trophic level तक लगभग कितनी energy transfer होती है
A) 50%
B) 90%
C) 10%
D) 1%
Answer: C
Description: 10%, ecosystem में लगभग 10 percent energy अगले trophic level तक transfer होती 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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