1. A
   (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
2. B
   (a) - (ii), (b) - (i), (c) - (iii), (d) - (iv)
3. C
   (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
4. D
   (a) - (iv), (b) - (ii), (c) - (iii), (d) - (i)

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1. A
   Low temperature, high pressure
2. B
   Low temperature, low pressure
3. C
   High temperature, high pressure
4. D
   High temperature, low pressure

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1. A
   Round bottom flask, burner, thermometer, wire gauze, stand with clamp, cork with two holes, glass tube
2. B
   Boiling tube, beaker, burner, burner, cork with one hole, stand with clamp, wire gauze
3. C
   Tripod stand, conical flask, thermometer, wire gauze, stand with clamp, pair of tongs
4. D
   Funnel, burner, clamp and stand, test tube, thermometer, wire gauze

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1. A
   Latent heat
2. B
   Combustion heat
3. C
   Heat of solution
4. D
   Specific heat

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1. A
   Air, sugar, oil
2. B
   Salt, juice, air
3. C
   Oxygen, water, sugar
4. D
   Water, air, wind

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1. A
   Brick, honey, water, air
2. B
   Air, water, honey, brick
3. C
   Brick, water, air, honey
4. D
   Brick, water, honey, air

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1. A
   Decrease in pressure
2. B
   Increase in temperature
3. C
   Increase in pressure
4. D
   Both decrease in pressure and an increase in temperature

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1. A
   solid
2. B
   vapour
3. C
   liquid
4. D
   both solid and liquid

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1. A
   Ethane
2. B
   Ether
3. C
   Acid
4. D
   Propranol

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1. A
   Metal, non metal and metalloid
2. B
   Solution, suspension and colloid
3. C
   Element, metal and compound
4. D
   Element, compound and mixture

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1. A
   298 K, 311 K and 339 K
2. B
   298 K, 310 K and 338 K
3. C
   298 K, 300 K and 338 K
4. D
   273 K, 278 K and 543 K

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1. A
   same
2. B
   first increases and then decreases
3. C
   decreases
4. D
   increases

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1. A
   china dish
2. B
   conical flask
3. C
   Water glass
4. D
   Test tube

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1. A
   centrifugation
2. B
   filtration
3. C
   diffusion
4. D
   sedimentation

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1. A
   Decrease in temperature of water
2. B
   Adding common salt to water
3. C
   Less exposed surface area of water
4. D
   Increase in temperature of water

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1. A
   keeps on increasing as long as heating is continued.
2. B
   may decreases or increases depending on the place where the experiment is being carried out.
3. C
   remains constant
4. D
   keeps decreases then increases.

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1. A
   Large surface area
2. B
   High temperature
3. C
   High wind speed
4. D
   Large humidity

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1. A
   $0^\circ\text{C}$
2. B
   $100^\circ\text{C}$
3. C
   $40^\circ\text{F}$
4. D
   $212^\circ\text{F}$

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1. A
   By increases the quantity of liquid.
2. B
   Boiling point is raised by increasing the pressure on the surface of the liquid.
3. C
   By decreasing the quantity of liquid.
4. D
   Boiling point is lowered by increasing the pressure on the surface of the liquid.

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1. A
   The inter-particle forces of attraction will first increases then decrease.
2. B
   The inter-particle forces of attraction will remain constant.
3. C
   The inter-particle forces of attraction will decrease.
4. D
   The inter-particle forces of attraction will increase.

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1. A
   All of these
2. B
   (A), (B) and (C) is correct.
3. C
   (B) and (C) is correct.
4. D
   (A) and (C) is correct.

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1. A
   Urea
2. B
   Iodine
3. C
   Ice
4. D
   Sugar

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1. A
   It is heavier than air.
2. B
   Its density is equal to that of air.
3. C
   It is lighter than air.
4. D
   No correct statement can be made about the density of the gas.

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1. A
   only ice is present
2. B
   both ice and water are present
3. C
   first water and then only ice
4. D
   only water is present

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1. A
   A hot and sunny day
2. B
   Hot and rainy weather
3. C
   On a rainy day
4. D
   Hot and dry weather

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