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1. A
   South-west Monsoon
2. B
   Western Disturbances
3. C
   Retreating Monsoon
4. D
   Temperate Cyclone

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1. A
   Brahmaputra river basin of Assam
2. B
   Damodar river basin of Jharkhand and West Bengal
3. C
   Himalayan mountain region
4. D
   Cardamom hills in Kerala

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1. A
   Fibrin
2. B
   Collagen
3. C
   Elastin
4. D
   Cellulose

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1. A
   $\textit{Ascaris lumbricoides}$
2. B
   $\textit{Culex pipiens}$
3. C
   $\textit{Wuchereria bancrofti}$
4. D
   $\textit{Fasciola hepatica}$

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1. A
   Ultraviolet radiation
2. B
   Infrared radiation
3. C
   X-ray radiation
4. D
   Short wave radio radiation

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1. A
   Food fibres
2. B
   Nucleic acids
3. C
   Lipids
4. D
   Carbohydrates

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1. A
   They are used in sewage treatment plants.
2. B
   They are used in industrial fermenters for the production of beverages.
3. C
   No antibiotic has been obtained from any microbe.
4. D
   They are used to get many bioactive molecules for the treatment of diseases.

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1. A
   Omega-3 fatty acids
2. B
   Vitamin A
3. C
   Vitamin B
4. D
   Vitamin C

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1. A
   The centripetal acceleration of the object is smaller for a gentle curve (i.e., curve of larger radius) than that for a sharp curve (i.e., curve of smaller radius).
2. B
   The centripetal acceleration is greater for a gentle curve than that for a sharp curve.
3. C
   The centripetal acceleration is the same for both, the gentle and sharp curves.
4. D
   The centripetal acceleration causes the object to slow down.

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1. A
   $2Ax - B$
2. B
   $-\frac{x^2}{6}(2Ax - 3B)$
3. C
   $Ax^3 - Bx^2$
4. D
   Zero

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1. A
   Holm
2. B
   Halogen
3. C
   Henry
4. D
   Hertz

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1. A
   $t_1 > t_2 > t_3$
2. B
   $t_1 > t_3 > t_2$
3. C
   $t_3 > t_1 > t_2$
4. D
   $t_1 = t_2 = t_3$

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1. A
   Thermionic emission
2. B
   Photoelectric emission
3. C
   High field emission
4. D
   Autoelectronic emission

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1. A
   About 4 minutes
2. B
   About 8 minutes
3. C
   About 24 minutes
4. D
   About 24 hours

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1. A
   GM Counter
2. B
   Polarimeter
3. C
   Calorimeter
4. D
   Colorimeter

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1. A
   concave
2. B
   convex
3. C
   cylindrical
4. D
   plane

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1. A
   Ultraviolet waves
2. B
   Infrared waves
3. C
   Radio waves
4. D
   Microwaves

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1. A
   free electrons
2. B
   conduction electrons
3. C
   ions
4. D
   holes

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1. A
   13·6 MeV
2. B
   13·6 eV
3. C
   13·6 Joule
4. D
   Zero

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1. A
   air
2. B
   hydrogen
3. C
   hydrogen and oxygen
4. D
   water vapour

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1. A
   HCl
2. B
   $\text{CH}_3\text{COOH}$
3. C
   $\text{CH}_3\text{OH}$
4. D
   NaOH

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1. A
   in etching glass
2. B
   as a bleaching agent
3. C
   as an extremely strong oxidizing agent
4. D
   in the preparation of strong organic fluorine compounds

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1. A
   ${}^{32}_{16}\text{S}$
2. B
   ${}^{34}_{16}\text{S}^+$
3. C
   ${}^{40}_{18}\text{Ar}^+$
4. D
   ${}^{35}_{16}\text{S}^{2-}$

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1. A
   22 atoms per mole
2. B
   twice the mass percent of H as compared to the mass percent of C
3. C
   six times the mass percent of C as compared to the mass percent of H
4. D
   thrice the mass percent of H as compared to the mass percent of O

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1. A
   Avogadro's hypothesis
2. B
   Gay-Lussac's hypothesis
3. C
   Planck's hypothesis
4. D
   Kirchhoff's theory

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