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1. A
   Reflection of light
2. B
   Refraction of light
3. C
   Dispersion of light
4. D
   Total internal reflection of light

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1. A
   0 – 200 Hz
2. B
   20 – 20,000 Hz
3. C
   200 – 20,000 Hz only
4. D
   2,000 – 20,000 Hz only

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1. A
   Hydrochloric acid
2. B
   Methanoic acid
3. C
   Citric acid
4. D
   Sulphuric acid

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1. A
   It is acidic
2. B
   It is neutral
3. C
   It is basic
4. D
   It is made up of Calcium phosphate, the material of tooth enamel

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1. A
   Sodium hydroxide solution
2. B
   Milk of magnesia
3. C
   Lemon juice
4. D
   Gastric juice

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1. A
   NaCl
2. B
   NaOH
3. C
   $\text{NaHCO}_{3}$
4. D
   $\text{Na}_{2}\text{CO}_{3}$

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1. A
   $\text{NaHCO}_{3}$
2. B
   $\text{Na}_{2}\text{CO}_{3} \cdot 10\text{H}_{2}\text{O}$
3. C
   $\text{Na}_{2}\text{CO}_{3} \cdot 5\text{H}_{2}\text{O}$
4. D
   NaOH

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1. A
   It is used as a reducing agent in chemical industries
2. B
   It is used for bleaching wood pulp in paper factories
3. C
   It is used for disinfecting drinking water
4. D
   It is used for bleaching linen in textile industry

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1. A
   single stranded circular DNA
2. B
   double stranded DNA
3. C
   single stranded RNA
4. D
   double stranded RNA

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1. A
   Cell wall
2. B
   Mitochondria
3. C
   Plasma membrane
4. D
   Ribosome

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1. A
   Bronchi
2. B
   Bowman's capsule
3. C
   Diaphragm
4. D
   Trachea

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1. A
   Thallophytes have well differentiated body design
2. B
   Funaria is a fungus
3. C
   All Pteridophytes are Phanerogams
4. D
   Vascular system is not found among Bryophytes

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1. A
   Phylum – Class – Order – Family – Genus
2. B
   Phylum – Class – Family – Order – Genus
3. C
   Family – Order – Class – Species – Genus
4. D
   Class – Family – Order – Species – Genus

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1. A
   These are dead tissues and form wood
2. B
   They provide flexibility to plant due to their thickened walls
3. C
   These are present in the bark of a tree only
4. D
   Growth occurs in plants due to division of cells of these tissues

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1. A
   Chandigarh
2. B
   Lakshadweep
3. C
   Andaman and Nicobar Islands
4. D
   Puducherry

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   Atacama
2. B
   Gobi
3. C
   Sahara
4. D
   Kalahari

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1. A
   2
2. B
   1 and 3
3. C
   4 only
4. D
   1 and 4

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1. A
   It changes from one place to another
2. B
   It is same everywhere
3. C
   It depends on its shape
4. D
   It does not depend on its temperature

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1. A
   stable equilibrium
2. B
   unstable equilibrium
3. C
   neutral equilibrium
4. D
   perfect equilibrium

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1. A
   1 and 2 only
2. B
   2 and 3 only
3. C
   1 only
4. D
   1, 2 and 3

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1. A
   Ammeter
2. B
   Barometer
3. C
   Potentiometer
4. D
   Lactometer

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1. A
   One
2. B
   Two
3. C
   Five
4. D
   Ten

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1. A
   By heating wood at high temperature in absence of air
2. B
   By heating coal at high temperature in absence of air
3. C
   By burning hydrocarbons in a limited supply of air
4. D
   By heating coal at high temperature in presence of air

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