1. \( \frac{e^2}{\epsilon_o h} \) has dimension of
Time Length Dimensionless Mass (c ) The expression \( \frac{e^2}{\epsilon_o h} \) is dimensionless (fine-structure constant). 2. Mercury is cooled to 4K, it behaves as
Semiconductor Insulator Superconductor Conductor (c ) Mercury becomes a superconductor below its critical temperature (~4.2K). 3. A person is traveling at 4 m/s towards east. The rain is apparently falling vertically downwards with 3 m/s, then the actual velocity of rain is
(b ) Using vector addition: \( v_{\text{rain}} = \sqrt{4^2 + 3^2} = 5 \, \text{m/s} \). 4. A cyclist turned over at 15 miles/hr. If doubled the speed of cycle then what is the chance of overturning?
Doubled Halved Quadrupled Constant (c ) Centripetal force \( F \propto v^2 \), so overturning chance quadruples when speed doubles. 5. The ratio of slope of P-V graph of adiabatic process and isothermal process is
(b ) Slopeadiabatic = γ × Slopeisothermal (where γ = Cp /Cv ). 6. A person is driving in a car with velocity 30 m/s towards the rock & the sound is reflected from rock. The person horned the car with frequency 600 Hz. The apparent frequency heard by the person is? [velocity of sound 330 m/s]
555.5 Hz 550 Hz 610 Hz 720 Hz (d ) Double Doppler effect: \( f' = f \left( \frac{v + v_o}{v - v_o} \right) = 600 \left( \frac{330 + 30}{330 - 30} \right) = 720 \, \text{Hz} \). 7. Soap bubbles shine due to
Refraction Diffraction Polarization Interference (d ) Colors in soap bubbles arise from thin-film interference. 8. A two pipe are joined which has length L & 2L and radius R & 2R. What is the pressure difference between those two pipes.
(a ) Using Poiseuille's law: \( \Delta P \propto \frac{L}{R^4} \). Ratio = \( \frac{L/R^4}{2L/(2R)^4} = \frac{1}{8} \). 9. With the increase in temperature the Young modulus
Increases Decreases Remains constant First increases then decreases (b ) Young's modulus decreases with temperature due to reduced stiffness. 10. The refractive index of diamond is 2.4. Then velocity of light in diamond is
1.25 × 108 m/s 2.5 × 108 m/s 3 × 108 m/s 8 × 108 m/s (a ) \( v = \frac{c}{\mu} = \frac{3 \times 10^8}{2.4} = 1.25 \times 10^8 \, \text{m/s} \). 11. A rest substance is broken into three pieces. First two pieces have equal mass with the velocity of 30 m/s move in perpendicular direction, 3rd piece has its mass 3 times the mass of each equal piece. Find the velocity of third piece.
9.8 m/s 20 m/s 14.4 m/s 30 m/s (c ) Conservation of momentum: \( m \times 30 \sqrt{2} = 3m \times v \Rightarrow v = 10 \sqrt{2} \approx 14.4 \, \text{m/s} \). 12. A water has temperature 22°C. A Geyser ejected 1L water per minute at 37°C. What is the power of geyser?
1050 watt 760 watt 2055 watt 1890 watt (a ) Power = \( \frac{mc\Delta T}{t} = \frac{1 \times 4200 \times 15}{60} = 1050 \, \text{W} \). 13. Reflecting telescope uses:
Convex Mirror Concave Mirror Plano-convex lens Prism (b ) Reflecting telescopes use concave mirrors to focus light. 14. Centrifugal force is
Centripetal force Gravitational force Viscous force Apparent force on rotating frame (d ) Centrifugal force is a pseudo-force in rotating frames. 15. A train travels for 40 km with velocity of 80 km/hr and again it travels next 40 km will velocity of 40 km/hr. Then average speed of train is
40 km/hr 48 km/hr 45 km/hr 53 km/hr (d ) Average speed = \( \frac{\text{Total distance}}{\text{Total time}} = \frac{80}{1.5} \approx 53.3 \, \text{km/hr} \). 16. Stationary observer heard twice the original source moving towards the observer. What is the frequency of the velocity of source? [Given the velocity of sound 332 m/s]
99 m/s 166 m/s 272 m/s 332 m/s (b ) Using Doppler effect: \( 2f = f \left( \frac{v}{v - v_s} \right) \Rightarrow v_s = \frac{v}{2} = 166 \, \text{m/s} \). 17. A circular object of radius 25 cm, is revolving with a speed of 2 rev/sec. Then what is the acceleration produced?
(b ) Centripetal acceleration \( a = \omega^2 r = (4\pi)^2 \times 0.25 = 4\pi^2 \, \text{m/s}^2 \). 18. A radioactive particle at rest is disintegrated into two pieces. What is its ratio of de-Broglie wavelength λ₁/λ₂.
(c ) By momentum conservation: \( \lambda_1 = \lambda_2 \) (since \( p_1 = p_2 \)). 19. A circular coil with its horizontal axis is perpendicular to the magnetic field. What is the angle between magnetic field and the plane of coil when the induced emf is maximum?
(a ) Induced emf is maximum when \( \theta = 0° \) (flux change rate is highest). 20. An A.C. Circuit contains resistance 4Ω and capacitive reactance 3Ω. Then, the impedance of circuit is
(a ) Impedance \( Z = \sqrt{R^2 + X_C^2} = \sqrt{4^2 + 3^2} = 5 \, \Omega \). 21. Which does not obey octet rule?
(c ) H₂SO₄ expands sulfur's valence shell beyond octet. 22. The highest pH at equivalence point exists for the titration between
Hydrochloric acid & Sodium hydroxide Oxalic acid & Ammonium hydroxide Hydrochloric acid & Ammonium hydroxide Oxalic acid and Sodium hydroxide (d ) Strong base (NaOH) + weak acid (oxalic acid) gives basic pH (>7). 23. Which of the following salt is most acidic in its aqueous solution
(a ) Fe³⁺ has highest charge density, causing maximum hydrolysis (acidic). 24. Which of the following has highest pH for its 0.1 M solution
(c ) Ca(OH)₂ is a strong base with highest [OH⁻] (pH ~13). 25. When equal volumes of the 0.1 M AgNO₃ solution & 0.2 M NaCl solution is mixed. The resulting concentration of NO₃⁻ ion in the solution is
(d ) Dilution factor of 2 ⇒ [NO₃⁻] = 0.1/2 = 0.05 M. 26. The oxidation number of S in SO₄²⁻
(c ) S has +6 oxidation state in SO₄²⁻ (O is -2). 27. During electrolysis of CuSO₄, its density
Increase Decrease Remains constant Flucuates (b ) Cu²⁺ deposits at cathode while water oxidizes at anode, reducing density. 28. Atomic spectrum of Hydrogen falling in the visible region
Lyman series Balmer series P-fund series Paschen series (b ) Balmer series (n=2) emits visible light. 29. Vapour of the alcohol can be easily dehydrogenated by using
Proton Cu Anhydrous CaCl₂ Heated Al₂O₃ (b ) Cu catalyzes alcohol dehydrogenation to aldehydes/ketones. 30. Glucose or fructose is converted into ethyl alcohol in presence of
Acid Hormone Enzyme Catalyst (c ) Enzymes (zymase) in yeast ferment sugars to ethanol. 31. The electrolysis of sodium salt of the succinic acid gives
Alkanes Alkenes Alkyl halides Alkynes (d ) Kolbe electrolysis of succinate yields ethyne (alkyne). 32. Natural polymer is
Bakelite Starch Polystyrene Polyvinyl chloride (b ) Starch is a natural carbohydrate polymer. 33. Which of the following reduces carbonyl compounds to hydrocarbons?
Birch reduction Wolf-Kishner reduction Perkin's condensation Rosenmund's reduction (b ) Wolff-Kishner reduces C=O to CH₂. 34. Formaldehyde of reaction with Ca(OH)₂
m-formaldehyde Formose Sucrose Maltose (b ) Formose sugar is produced (formaldehyde polymerization). 35. Which of the following is unsaturated in nature?
(b ) C₂H₂ (acetylene) has a triple bond (unsaturated). 36. Most volatile alkane among the following is
n-Hexane Isopentane Neopentane n-Butane (d ) n-Butane (lowest MW) has highest volatility. 37. Acetyl salicylic acid is used as
Antibiotic Antiseptic Antipyretic Antacid (c ) Aspirin (acetyl salicylate) is antipyretic (fever-reducing). 38. When phenol with chloroform in presence of aq. NaOH is reacted to form sodium salt of salicylaldehyde. This reaction is called as
Reimer-Tiemann reaction Gattermann - Koch reaction Rosenmund reduction Hoffrnann's reaction (a ) Reimer-Tiemann reaction introduces -CHO group to phenol. 39. Which of the following reducing agent reduces carboxylic acid directly to alkane?
LiAlH₄ NaBH₄ Na + C₂H₅OH HI + red phosphorus (d ) HI/P reduces -COOH to -CH₃. 40. Methyl magnesium iodide, after treatment with CO₂, on further hydrolysis forms
Methanoic acid Ethanoic acid Methyl iodide Acetaldehyde (b ) Grignard + CO₂ → carboxylic acid (here, acetic acid). 41. The chemical compound, which gives white precipitate
Hg(NH₂)Cl HgI₂ H₂NHgOHgl Hg(NH₃)Cl (a ) Hg(NH₂)Cl (mercuric amidochloride) is a white precipitate. 42. Raney Ni is alloy of
Al + Ni Cu + Ni Zn + Ni Rb + Ni (a ) Raney nickel is Ni-Al alloy (activated catalyst). 43. Railway wagon axles are made by heating rods of iron embedded in charcoal powder.
Annealing Sheradizing Case hardening Tempering (c ) Case hardening increases surface hardness via carbon diffusion. 44. The second ionization potential is highest in case of
Sulphur Argon Sodium Magnesium (c ) Na⁺ has stable noble gas configuration (highest 2nd IP to remove e⁻). 45. In the extraction of Cu, the reaction takes in Bessemer converter
2CuFeS₂ + O₂ → Cu₂S + FeS + SO₂ 2CuS + 3O₂ → 2Cu₂O + SO₂ 2Cu₂O + Cu₂S → 6Cu + SO₂ 2FeS + 3O₂ → 2FeO + 2SO₂ (c ) Bessemer converter: \( 2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2 \). 46. The VII A group of the periodic table is know as halogen family due to its property of forming
Acid ores Amphoteric nature Salts (d ) Halogens (Greek: 'salt formers') readily form salts with metals. 47. Very dilute solution of the zinc sulphate is used as
Fertilizers Eye drops Germicide Fungicide (b ) ZnSO₄ is used in eye drops (astringent/antiseptic). 48. Chemical composition of the fuming sulphuric acid,
H₂SO₄ H₂SO₄ + SO₂ H₂SO₄ + H₂O H₂SO₄ + SO₃ (d ) Fuming H₂SO₄ = Oleum (H₂SO₄ + dissolved SO₃). 49. Excess of NaOH when created with ZnSO₄ forms
White precipitate Insoluble complex sodium Bluish precipitate Soluble complex (d ) Zn²⁺ + excess NaOH → soluble [Zn(OH)₄]²⁻ complex. 50. In Solvay ammonia process, bicarbonate is precipitated by
Conc. NH₃ Action of CO₂ Brine solution CuSO₄ solution (b ) CO₂ bubbled into NH₃ + NaCl solution precipitates NaHCO₃. 51. Epiphyllous buds are characteristics of
Nutrition Reproduction Respiration Absorption (b ) Epiphyllous buds (on leaves) aid vegetative reproduction. 52. Which of the following involves photosynthesis & respiration?
Bacteria Fungi Virus Green plants (d ) Green plants perform both photosynthesis and respiration. 53. The first step involved in the photosynthesis
Photolysis of water Excitation of electron from chlorophyll from PS I/ PS II Fixation of CO₂ Production of NADPH₂ & ATP (b ) Light absorption excites chlorophyll electrons first. 54. Cytochrome helps in
Electron transport Glucose converting into CO₂ Glycolysis Kreb's cycle (a ) Cytochromes are electron carriers in ETC. 55. Nutrition to the developing microspores is provided by
Endothecium Tapetum Middle layers Epidermis (b ) Tapetum nourishes pollen grains. 56. Flowers which remains closed upto seed set is
Cleistogamous Chasmogamous Homogamous Heterogamous (a ) Cleistogamous flowers never open (self-pollination). 57. Atmospheric Nitrogen is converted to nitrogenous compound by
Nitrifying Bacteria Denitrifying bacteria N₂ fixing bacteria Ammonifying bacteria (c ) N₂-fixers (e.g., Rhizobium) convert N₂ → NH₃. 58. Bacteria without flagella is
Peritrichous Atrichous Amphitrichous Lophotrichus (b ) Atrichous = no flagella. 59. Ornithophily is pollination by
(a ) Ornithophily = bird pollination (e.g., hummingbirds). 60. Jute fibre is obtained from
Secondary xylem Secondary phloem Primary xylem Schrenchymatous tissue (b ) Jute fibers are phloem fibers (bast fibers). 61. Angiosperms are distinguished from Gymnosperms
Secondary growth Primary growth Presence of enclosed ovule Geographical distribution (c ) Angiosperms have enclosed ovules (in ovaries). 62. The first evidence of DNA as a genetic material is,
DNA is enclosed within nucleus DNA is formed by chromosome Transformation of Bacterial DNA DNA is not found in cytoplasm (c ) Avery-MacLeod-McCarty experiment (1944) proved DNA as genetic material. 63. Plasmolysis is caused when cell is placed in
Hyperthermic Hypertonic Hypotonic None (b ) Hypertonic solution causes water loss & plasmolysis. 64. The plants which can only tolerate narrow range of temperate is
Mesothermic Stenothermic Eurythermic Helikothermic (b ) Stenothermic = narrow temperature tolerance. 65. Annual rings helps in determining
Secondary growth Diameter of tree/plants Lateral growth Age of plant (d ) Annual rings = 1 year of growth (count for age). 66. Ginger is propagated by
(b ) Ginger propagates via rhizomes (underground stems). 67. Mycorrhiza is
Association between algae & fungi Association between higher plants with fungi Ectoparasite All (b ) Mycorrhiza = plant root + fungal symbiosis. 68. Terminalization occurs in
Diakinesis Diplotene Zygotene Pachytene (a ) Terminalization (chiasmata shift to ends) in diakinesis. 69. Down's syndrome is
Monosomy Trisomy Triploidy Polyploidy (b ) Down syndrome = trisomy 21. 70. Oxysomes in present
In inner membrane of mitochondria Outer membrane of mitochondria Cytoplasm Thylakoid (a ) Oxysomes (ATP synthase) on mitochondrial inner membrane. 71. Ectoparasite of fish falls under
Monogenea Turbellaria Trematoda Cestoda (a ) Monogeneans are fish gill ectoparasites. 72. Which of the following is dimorphic protozoa
Plasmodium Paramecium Polystomella Amoeba (a ) Plasmodium has dimorphic life stages (sporozoite & merozoite). 73. Zika virus is caused by
Sandfly Aedes mosquitoes Culex mosquitoes Rat (b ) Zika virus is transmitted by Aedes mosquitoes. 74. Blood fluke parasite is
Schistosoma Diphyllobothrium Trypanosoma Paramecium (a ) Schistosoma causes schistosomiasis (blood fluke). 75. Time taken by spermatogonia to mature into spermatozoa is
24 days 30 days 40 days 64 days (d ) Spermatogenesis takes ~64 days in humans. 76. Endothelium is
Fully permeable Non - permeable Selectively permeable Elastic in nature (c ) Endothelium selectively permits diffusion (e.g., capillaries). 77. Blood in urine is termed as
Anuria Hematuria Ketonuria Alkanuria (b ) Hematuria = blood in urine. 78. Hookworm infection causes the deficiency of
Vitamin B₁₂ Vitamin A Iron Folic acid (c ) Hookworms cause iron-deficiency anemia (blood loss). 79. Which is not a blood parasite?
Trichinella Trypanosoma Plasmodium Leishamania (a ) Trichinella infects muscles (not blood). 80. Filariform is the infective stage of ?
Hook worm Ascaris Tapeworm Threadworm (a ) Hookworm filariform larvae penetrate skin. 81. Ischium and Ilium forms
Obturator foramen Acetabulum Acromian process Metacromian process (b ) Acetabulum (hip socket) is formed by ilium + ischium + pubis. 82. Pancreatic secretion is stimulated by
Secretin Oxytocin Enterokinase Succus entericus (a ) Secretin (from duodenum) stimulates pancreatic juice secretion. 83. Cardiac muscle is,
Striated and voluntary Non striated and voluntary Striated and involuntary Non striated and involuntary (c ) Cardiac muscle: striated (like skeletal) but involuntary. 84. Addison's disease is caused due to deficiency of
Adrenaline Progesterone Glucocorticoids Oestrogen (c ) Addison's = adrenal insufficiency (low cortisol/aldosterone). 85. Which of the following organism has red blood but does not have red blood cells?
Cockroach Earthworm Pigeon Frog (b ) Earthworm blood contains hemoglobin (dissolved in plasma). 86. Ciliated epithelium is found in
Small intestine Trachea Bile duct Gonads (b ) Trachea has ciliated epithelium to move mucus. 87. Which of the following is intestinal parasites
Entamoeba Plasmodium Trypanasoma L. donovani (a ) Entamoeba histolytica causes amoebic dysentery. 88. If iron is removed from haemoglobin remaining part is
Bilirubin Haem Globin Haematin (c ) Globin = protein part (without heme/iron). 89. The principal tissues in human body are
Nervous, fibrous, connective, muscular Epithelial, connective, skeletal, nervous Nervous, epithelial, connective, muscular Ciliated, connective, muscular, reticular (c ) 4 primary tissues: nervous, epithelial, connective, muscular. 90. Damage of occipital lobe affects.
Memory Vision Speech Hearing (b ) Occipital lobe processes visual information. 91. Semi digested food entering into the duodenum is called
(c ) Chyme = stomach-digested food entering duodenum. 92. Sting gland of honey bee & sting gland of scorpion are
Analogous organ Homologous organ Rudimentary organ Vestigeal organ (a ) Analogous (similar function, different origin). 93. Which of the following parasite is transmits through kissing
Entamoeba gingivalis Entamoeba histylotica Ancylostoma Ascaris (a ) E. gingivalis infects gums (transmitted via saliva). 94. Podocytes cells are found in
Wall of Capillaries Glomerulea of Kidney Arterioles Hypothalamus of brain (b ) Podocytes wrap around glomerular capillaries (kidney). 95. Connecting link between Reptiles & Birds is?
Neoplina Dodo Archaeopteryx Chimaera (c ) Archaeopteryx has reptilian (teeth, tail) and avian (feathers) traits. 96. In Hydra, Cross-fertilization occurs because they are
Monoecious Hermaphrodite Protandrous Protogynous (b ) Hydra is hermaphroditic (both sexes in one individual). 97. Which of the following salivary gland is absent in human beings?
Sublingual Submandibular Infraorbital Parotid (c ) Humans lack infraorbital salivary glands. 98. Which is heterocrine gland?
Liver Pineal gland Thymus gland Pancrease (d ) Pancreas is heterocrine (endocrine + exocrine functions). 99. Posterior pituitary releases
Vasopressin & Oxytocin Estradiol & Aldosterone Adrenaline & Nor-adrenaline Cortisol & corticosterone (a ) Posterior pituitary stores/releases ADH and oxytocin. 100. The centre for the regulation of body temperature & urge of eating?
Medulla oblongata Cerebellum Cerebrum Hypothalamus (d ) Hypothalamus regulates homeostasis (temp, hunger). 