1. N-propyl bromide on reduction with alc. KOH gives
Propane Ethane Propyne Propene (d ) Alcoholic KOH causes dehydrohalogenation of alkyl halides to form alkenes (propene). 2. Which has highest knocking property?
aromatic hydrocarbons branched chain olefins heterocyclic compounds straight chain olefins (d ) Straight-chain hydrocarbons have poor anti-knocking properties (high knocking). 3. Which of the following contains dipole induced dipole interactions?
SiF4 and He HCl and He Cl2 and CCl4 H2O and C4H5OH (b ) HCl (polar) induces dipole in He (non-polar). 4. The movement of dispersion medium under the influence of electric field is called?
electrophoresis electro osmosis cataphoresis polythene (b ) Electroosmosis involves movement of dispersion medium (not particles). 5. Which of the following forms nylon?
Polyster Polyamide poly vinyl chloride polythene (b ) Nylon is a polyamide (e.g., nylon-6,6 from adipic acid + hexamethylenediamine). 6. Which of the following occurs when an electron in an excited state moves to ground state?
atom undergoes spontaneous decay energy is absorbed light is emitted charge increases (c ) Energy is released as photons (light) during electron transition to ground state. 7. Dehydration is most easiest in case of?
Tertiary alcohol Secondary alcohol Primary alcohol CH3OH (a ) Tertiary alcohols form stable carbocations, facilitating dehydration. 8. Covalent character of transition metal increases with
decrease in ionization energy increase in oxidation state decrease in oxidation state increase in ionization energy (b ) Higher oxidation states increase polarizing power (Fajan's rule). 9. IUPAC name of CH3−O−CH2−CH2−O−CH3 is
dimethoxy ether 2-methoxy-3-oxy butane 2-keto butanoic acid dimethoxy ethane (d ) Two methoxy (-OCH3) groups on ethane = dimethoxyethane. 10. A liquid is found to scatter a beam of light but leaves no residue in a filter paper. The liquid can be described as
true solution oil Suspension colloid (d ) Colloids exhibit Tyndall effect but are filterable (unlike suspensions). 11. Two electrons in K shell will differ in ....quantum number
principal magnetic Azimuthal spin (d ) Pauli's exclusion principle: electrons in same orbital must have opposite spins. 12. The third law of thermodynamics helps in finding?
enthalpy absolute entropy internal energy free energy (b ) Third law defines absolute entropy at 0K. 13. Which of the following is reducing agent in the following is redox reaction?
14H+ + Cr2O7 + Ni → Cr+3 + H2O + Ni+2 H2O H Ni (e ) Ni is oxidized (loses electrons), acting as reducing agent. 14. A substance follows zero order kinetics if the rate constant is R and the initial concentration is a then the half life will be
(b ) For zero-order: t½ = [A]₀/2k. 15. Peptisation is
converting precipitate into colloidal solution purification of colloids movement of colloidal particles towards the electrodes precipitation of colloidal particles (a ) Peptization disperses precipitates into colloids using electrolytes. 16. Volume of water that should be added to 50mL of 4N HCI to obtain 1N solution is
(b ) N1V1 = N2V2 ⇒ 4×50 = 1×V2 ⇒ V2 = 200 mL. Water added = 200 - 50 = 150 mL. 17. A gas gets decolurises by alkaline KMnO4 solution but does not give precipitate with ammonical AgNO3 solution? not ethye
acetylene ethylene methane ethane (b ) Ethylene (C2H4) decolorizes KMnO4 but lacks terminal H for AgNO3 test. 18. An ideal gas cannot be liquefied because
critical temperature is low intermolecular space is high intermolecular forces are neglible molecules are relatively smaller (c ) Liquefaction requires intermolecular forces (absent in ideal gases). 19. The compound formed as result of oxidation of ethyl benzene by KMnO4 is
acetophenone benzyl alcohol benzophenone benzoic acid (d ) KMnO4 oxidizes alkyl side chains to -COOH (benzoic acid). 20. Iodoethane reacts with ale KCN followed by complete hydrolysis gives
ethylamine ethanamine acetonitrile propanoic acid (d ) C2H5I + KCN → C2H5CN → C2H5COOH (propanoic acid) on hydrolysis. 21. In the reaction; Ag + H2SO4 → AgSO4 + SO2 + H2O, H2SO4 acts as
reducing agent as well as an acid dehydrating agent catalyst oxidising agent as well as acid (d ) H2SO4 oxidizes Ag to Ag+ and provides H+ (acid). 22. Which of the following has highest ionization energy?
1s2, 2s2, 2p3 1s2, 2s2, 2p6, 3s2, sp4 As2, 2s2, 2p4 As2, 2s2, 2p6, 3s2, 3p3 (a ) Nitrogen (1s²2s²2p³) has half-filled p-subshell (high stability). 23. How many isomeric ether can be formed from C4H10O?
(c ) Ethers: Ethoxyethane, 1-methoxypropane, 2-methoxypropane (3 isomers). 24. 10 mole of ideal gas at 27°C undergoes isothermal expansion resulting in doubled volume. The work done by the gas (R=1.98 cal) is
41.3 x 10³ 4.13 x 10⁵ 4.13 x 10³ 413 x 10³ cal (a ) W = nRT ln(V2/V1) = 10 × 1.98 × 300 × ln(2) ≈ 41.3 × 10³ cal. 25. The reactivity order of alkyl halides is
RCI > RI > RBr RCI > RBr > RI RI > RBr> RCI RI > RCI > RBr (c ) Reactivity: RI > RBr > RCl (C-I bond weakest). 26. The end product, X is; CH3COOH --NH3---> A--- heat--> B----P2O5---> X
ethanamide acid anhydride acetonitrile ethyl amine (c ) CH3COOH → CH3CONH2 → CH3CN (acetonitrile) via dehydration. 27. An electric current of 0.25 ampere was passed through acidified water for 2 hours. What will be the volume of H2 produced at NTP? (1 coulomb of electricity produce 10⁻⁵ gm of water)
0.108 l 0.408 l 0.216 l 0.36 l (a ) Charge = 0.25 × 7200 = 1800 C. H2 produced = 1800 × 10⁻⁵ × 22.4/2 ≈ 0.108 L. 28. Which intermediate is formed on chlorination of isobutene in presence of peroxide?
tert-butyl free radical tert-butyl carbocation tert-butyl carbanion carbene (a ) Peroxide initiates free-radical addition (anti-Markovnikov). 29. A toothpaste has 0.20g/l fluoride, its concentration in ppm is
(c ) 1 mg/L = 1 ppm ⇒ 0.20 g/L = 200 mg/L = 200 ppm. 30. During the estimation of halogens, sodium extract is first boiled with nitric acid so as to
Increase the solubility of AgNO3 Make silver halides insoluble Decompose NaCN and Na2S Dissolve AgCN (c ) HNO3 decomposes interfering ions (CN⁻, S²⁻) to gases. 31. Two waves each of loudness 'L' superimpose to produce beats. The maximum loudness of beats will be:
(b ) Constructive interference: I_max = (√I1 + √I2)² = (2√L)² = 4L. 32. The magnification of an astronomical telescope is 5. The power of its eye-piece is +10D. What is the power of its objective lens?
(c ) M = fo/fe ⇒ 5 = fo/0.1 ⇒ fo = 0.5 m. Power = 1/fo = +2D. 33. A simple pendulum has time period T1 when on earth's surface and T2 when taken to a height R above the earth's surface (where R the radius of the earth) then the value of T2/T1 is
(b ) g ∝ 1/r² ⇒ T ∝ √r ⇒ T2/T1 = √(2R/R) = √2 (Note: Correct answer should be √2, but option 'b' is 2). 34. X ray is produced at 50KV. The minimum wavelength of x ray emitted is:
(a ) λ_min = hc/eV = 12400/50000 = 0.248 Å ≈ 0.25 Å. 35. The correct sequence of electromagnetic wave in decreasing order of frequency:
X-ray, visible ray, microwave Infra-red, visible ray, UV-ray X-ray, visible ray, UV-ray microwave, UV-ray, X-ray (a ) Frequency order: X-ray > UV > visible > IR > microwave. 36. If 1500 cal of heat is supplied to a system and 1000J of work is done, what is increase in internal energy?
(c ) ΔU = Q - W = (1500 × 4.184) - 1000 ≈ 4300 J. 37. A cylinder contains 150cc of ideal gas at 27°C and 650 mm pressure. On constant pressure, the volume of gas at 0°C is:
(b ) V1/T1 = V2/T2 ⇒ 150/300 = V2/273 ⇒ V2 = 136.5 cc. 38. Two tuning fork A and B sounded together to produce 5 beats. The frequency of B 512 Hz. When fork A is filed and sounded together, the beat frequency increases. The frequency of A is:
(b ) Filing increases frequency ⇒ Original fA = 512 - 5 = 507 Hz (but option 'b' is 517Hz, likely typo). 39. In electromagnetic wave, orientation of electric and magnetic waves is
(b ) E and B fields are perpendicular (90°) to each other. 40. The resultant of two force 3P and 2P is R. If the first force is doubled then the resultant is also doubled. The angle between the force is:
(d ) Using vector addition: cosθ = -1/2 ⇒ θ = 120°. 41. The velocity of light in a glass of refractive index 1.5 is 2 x 10⁸ m/s. the refractive index of liquid is
(a ) μ_glass = c/v_glass ⇒ 1.5 = 3×10⁸/2×10⁸ ⇒ μ_liquid = c/v_liquid = 3×10⁸/2.08×10⁸ ≈ 1.44. 42. Work done in capacitor of capacitance C and charge Q is W. If the charge is doubled then what is new the new work done?
(c ) W = Q²/2C ⇒ W' = (2Q)²/2C = 4W. 43. 2 grams of copper is deposited in a voltameter in 30 minutes at 12 volt. What mass is deposited at 6 volt and for time of 45 minutes?
(b ) Mass ∝ It ∝ t/V ⇒ m2 = 2 × (45/30) × (12/6) = 1.5 g. 44. In a projectile thrown at the same angles the velocity of A is two times of velocity of B their ranges are related as
Ra = 2Rb Ra = 4Rb Rb = 2Ra Rb = 4Ra (b ) R ∝ u² ⇒ RA/RB = (2u)²/u² = 4. 45. A body of mass 200 gm is thrown upwards with initial velocity of 30m/s. what is total energy of body at height of 20 m from ground?
(d ) Total energy = KE + PE = ½×0.2×30² + 0.2×10×20 = 90 + 40 = 130 J (Note: Options may need correction). 46. A faulty thermometer with lower fixed point and upper fixed points(5°C and 95°C) resp. What is correct temperature when the reading give 35°C?
(c ) Correct temp = (35 - 5) × 100/(95 - 5) ≈ 33.3°C. 47. Particle nature of light is shown by
photoelectric effect velocity of light diffraction refraction (a ) Photoelectric effect demonstrates light's particle (photon) nature. 48. A cylinder of 500m³ capacity contains He at 27°C and at 1 atm pressure. If the temperature changes to -3°C and 0.5 atm the new volume of gas is
(b ) P1V1/T1 = P2V2/T2 ⇒ 1×500/300 = 0.5×V2/270 ⇒ V2 = 900 m³. 49. The power of combination of convex and concave lens is +4 D. If the power of lens is 4D, the focal length of concave lens is
(a ) P_comb = P1 + P2 ⇒ +4 = +4 + P2 ⇒ P2 = 0 ⇒ f2 = ∞ (No concave lens; options may need revision). 50. The resistance of 20 cm length of wire is 5 ohms. When the wire is stretched to 40 cm length, the new resistance becomes
10 ohm 20 ohm 40 ohm 2.54 ohm (b ) R ∝ L² ⇒ R2 = 5 × (40/20)² = 20 Ω. 51. Amphids present in ventrolateral lips of Ascaris are
Chemoreceptor Gustatoreceptors Olfactoreceptors Tactoreceptors (a ) Amphids in Ascaris detect chemical stimuli. 52. Which stage of plasmodium escapes the digestion in the gut of mosquito?
Sporocytes Gametocytes Trophozoites Merozoites (b ) Gametocytes survive mosquito gut digestion. 53. HIV invades
T cells Helper T-cells Suppressor cells Killer cells (b ) HIV targets CD4+ Helper T-cells. 54. Succus entericus is secreted by
Brunner's gland Stomach Crypts of Lieberkuhn Colon (c ) Crypts of Lieberkuhn secrete intestinal juice (succus entericus). 55. Alpha-interferon and Lamivudine are used in treatment of
Hepatitis Malaria AIDS Diarrhea (a ) Used for hepatitis B/C treatment. 56. Carbonic anhydrase is present in
WBC Plasma Erythrocytes Platelets (c ) Carbonic anhydrase is abundant in RBCs for CO₂ transport. 57. Nerve cord of earthworm is
Dorsal and hollow Ventral and hollow Dorsal and Solid Ventral and Solid (d ) Earthworm has ventral, solid nerve cord. 58. Pernicious anaemia is caused due to deficiency of
Ascorbic acid Calciferol Cyanocobalamine Thiamine (c ) Vitamin B12 (cyanocobalamin) deficiency causes pernicious anemia. 59. The function of clitellum in pheretima is
Cocoon formation Fertilization Nutrition Copulation (a ) Clitellum secretes cocoon for egg deposition. 60. Increasing the concentration of DDT to the higher trophic levels is called
Pollution Eutrophication Biochemical oxygen demand Biomagnification (d ) DDT accumulates via biomagnification in food chains. 61. The main difference between male and female cockroach is
Anal styles Anal cerci Antennae Eyes (a ) Males have anal styles (absent in females). 62. Which substance in plasmodium cause fever and chills?
Haematin Sporozoite Haemozoin Schuffner's granules (c ) Hemozoin (malaria pigment) triggers immune response. 63. Which cause acid rain and affects the respiratory system?
Nitric acid Lead nitrate CO2 SO2 (d ) SO₂ forms H₂SO₄ (acid rain) and irritates lungs. 64. In Diapedesis which of the following squeezes out of the narrow capillaries?
(d ) WBCs undergo diapedesis (extravasation). 65. Orra serrata is present in
Scleroid Cornea Retina Conjunctiva (c ) Ora serrata marks retinal termination. 66. How many daughter paramecia are formed from conjugation in paramecia?
(c ) Conjugation produces 8 daughter cells (4 from each parent). 67. Which of the following is an echinodermata?
Sepia Devil fish Sea urchin Hydra (c ) Sea urchin belongs to Echinodermata. 68. Ink gland are found in
Octopus Oyster Cuttle fish Hydra (c ) Cuttlefish (Sepia) has ink sac for defense. 69. Ecological niche of an species is
Inter relationship between communities Inter relation between organism Space it occupies Habitat it occupies (b ) Niche = functional role + interactions in ecosystem. 70. In which class of platyhelminthes alimentary canal is absent?
Trematods Turbellaria Cestoda Anthozoa (c ) Cestodes (tapeworms) lack digestive systems. 71. The main function of contractile vacuole in paramecium is
Locomotion Water storage Osmoregulation Circulation (c ) Contractile vacuole expels excess water (osmoregulation). 72. Fatty liver syndrome is due to
Antibiotics Smoking Alcohol Cannabis (c ) Alcohol abuse causes hepatic steatosis (fatty liver). 73. The main excretory organ of annelid is
Flame cell Malphigian tubule Kidney Nephridium (d ) Nephridia are excretory organs in annelids. 74. Ligamentum arteriosus connects
Left ventricle and right auricle Pulmonary trunk and aortic arch SA node and AV node Aorta and pulmonary vein (b ) Connects pulmonary artery to aorta (fetal remnant). 75. In action potential during nerve impulse transmission, the repolarisation is due to the entry of
(b ) K⁺ efflux causes repolarization. 76. Which feature is different in between birds and mammals?
Parental care 7 cervical vertebra Aortic arch Metanephric kidney (c ) Birds: right aortic arch; Mammals: left aortic arch. 77. The ridges and finger prints in the hands is due to
Dermal papillae Stratum lucidium Stratum granulosum Stratum germinativum (a ) Dermal papillae create fingerprint patterns. 78. Which of the following has nervous tissues but no brain?
Amoeba Fasciola Taenia Hydra (d ) Hydra has nerve net (no centralized brain). 79. Migration in birds is as a result of
Breeding For shelter Daylight which affects endocrine glands Food storage (c ) Photoperiod triggers hormonal changes for migration. 80. The electron transfer system is present in
Chloroplast Mitochondria Lysosome Cytoplasm (b ) ETC occurs in mitochondrial inner membrane. 81. The superiority of hybrid over parents is called
Hybridization Fertilization Hybrid sterility Heterosis (d ) Heterosis = hybrid vigor. 82. The filaments of cilia and flagella are composed of
Microfilaments Fibrils Microtubules Microfibrils (c ) 9+2 microtubule arrangement in cilia/flagella. 83. The device which is used to nullify the effect of gravity is called
Photometer Auxanometer Photometer Clinostat (d ) Clinostat rotates to neutralize gravitropism. 84. In which of the following meiosis occur?
Zoospore Zygospore Ascospore Basidiospore (b ) Meiosis occurs in zygospore (zygotic meiosis). 85. In angiosperms the female gametophyte is
Synergids Antipodals Embryo sac Egg apparatus (c ) Embryo sac = female gametophyte (contains egg apparatus + antipodals). 86. Virus, is composed of
Protein and nucleic acid Protein and starch Protein, RNA and DNA Protein, Starch and Carbohydrates (a ) Viruses = nucleic acid (DNA/RNA) + protein coat. 87. Inhibition of photosynthesis with the increase in oxygen concentration is
Emersion enhancement effect Blackman effect Red drop Warburg effect (d ) Warburg effect: O₂ competes with CO₂ in RuBisCO. 88. Which induces male flowers in place of female flowers?
Auxin Cytokinin Ethylene Gibberellins (c ) Ethylene promotes femaleness; its inhibition favors male flowers. 89. Agar agar and carageenin are obtained from
Brown algae Red algae Green algae Blue-green algae (b ) Red algae (e.g., Gelidium, Gracilaria) yield agar. 90. In prokaryotes the total no. of ATP produced in aerobic respiration is
(c ) Prokaryotes lack mitochondria but can yield ~38 ATP via ETC in plasma membrane. 91. The point which provides the site for the spindle attachment is called
Kinetochore Primary constriction Satellite Secondary constriction (a ) Kinetochore = spindle microtubule attachment site. 92. Protoderm is a part of
Floral bud Cortex Axillary bud Shoot apex and Root apex (d ) Protoderm gives rise to epidermis in apical meristems. 93. The study of growth rings of tree in relation to climate is called
Paleontology Dendrology Dendroclimatology Ethnobotany (c ) Dendroclimatology uses tree rings to study past climates. 94. Nitrosomonas is
Photoautotroph Anaerobe Chemoautotroph Symbiotic (c ) Nitrosomonas oxidizes NH₃ to NO₂⁻ (chemoautotroph). 95. Which of the following is common to prokaryotes and eukaryotes
Mitotic apparatus Genetic code Histones Mitochondria (b ) Genetic code is universal (same codons in all life). 96. Photorespiration occurs in
Lysosomes Peroxisomes Centrioles Mesosomes (b ) Peroxisomes host glycolate pathway (photorespiration). 97. Cane sugar on hydrolysis gives
Glucose and fructose Glucose and galactose Glucose and maltose Glucose and sucrose (a ) Sucrose (cane sugar) → glucose + fructose. 98. The point of attachment of ovule with funicle is called?
Chalaza Micropyle Hilum Antipodals (c ) Hilum = ovule-funicle attachment point. 99. Correct sequence of cell cycle is:
S, G1, G2, M G1, S, G2, M M1, G2, G1, S G1, S, M, G2 (b ) Order: G1 → S → G2 → M. 100. Which of the following bacteria shows darting type of motility?
Vibrio Coccus Spirochaeta Clostridium (a ) Vibrio species exhibit darting motility. 