1. A
   Reaction of nail polish with acetone
2. B
   Boiling of acetone
3. C
   Evaporation of acetone from the nail
4. D
   Reaction of acetone with skin

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1. A
   Mixing of milk into curd
2. B
   Freezing of water
3. C
   Burning of paper
4. D
   Mixing of iron filling \& sand

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1. A
   The Vapour pressure of ether is greater than that of alcohol.
2. B
   Molar mass of ether is greater than that of alcohol.
3. C
   Vapour pressure of alcohol is greater than that of ether.
4. D
   Boiling point of ether is higher than that of alcohol.

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

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1. A
   First exothermic then endothermic
2. B
   Athermic
3. C
   Exothermic
4. D
   Endothermic

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1. A
   Nitrogen and Carbon dioxide.
2. B
   Nitrogen and Oxygen
3. C
   Hydrogen and Oxygen
4. D
   Nitrogen and Hydrogen

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1. A
   308 K, 329 K, 391 K
2. B
   306 K, 329 K, 391 K
3. C
   329 K, 392 K, 308 K
4. D
   308 K, 329 K, 392 K

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1. A
   Sodium Bromide
2. B
   Ammonia
3. C
   Carbon dioxide
4. D
   Ethyl alcohol

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1. A
   I only
2. B
   II, III and IV only
3. C
   I and IV only
4. D
   III and IV only

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1. A
   water starts boiling
2. B
   temperature starts rising
3. C
   temperature becomes constant
4. D
   whole of the water evaporates

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1. A
   Sponge
2. B
   Wood
3. C
   Marble
4. D
   Stone

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1. A
   By increasing the temperature.
2. B
   By increasing the temperature and reducing the pressure.
3. C
   By increasing the pressure and reducing the temperature.
4. D
   By lowering the pressure.

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1. A
   Both have the same inter-particle forces.
2. B
   Both have greater inter-particle forces.
3. C
   Solid [B]
4. D
   Solid [A]

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1. A
   Steam distillation
2. B
   Fractional distillation
3. C
   Sublimation
4. D
   Chromatography

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1. A
   By touching the surface of china dish
2. B
   By taking the help of the teacher.
3. C
   By using a thermometer
4. D
   By smell of alcohol vapour

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1. A
   both the solid \& liquid exist together.
2. B
   the solid start melting.
3. C
   the solid is completely changed into a liquid.
4. D
   only liquid is present.

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1. A
   (ii) and (iii)
2. B
   (i) and (iii)
3. C
   (i) and (iv)
4. D
   (ii) and (iv)

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1. A
   Both statements 1 and 2 are false.
2. B
   Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
3. C
   Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
4. D
   Statement 1 is true and statement 2 is false.

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1. A
   $\text{NH}_3$ and $\text{N}_2$
2. B
   $\text{NH}_3$ and $\text{H}_2$
3. C
   $\text{CO}$ and $\text{SO}_2$
4. D
   $\text{CO}$ and $\text{N}_2$

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1. A
   By keeping the dish under a running fan
2. B
   All of these
3. C
   By keeping the dish in the open
4. D
   By blowing air into the liquid

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1. A
   all temperatures
2. B
   temperature less than $100^\circ\text{C}$
3. C
   fixed temperature
4. D
   temperature more than $100^\circ\text{C}$

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1. A
   I, II and III only
2. B
   I and II only
3. C
   II and III only
4. D
   I, II, III and IV only

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1. A
   II and III only
2. B
   I and IV only
3. C
   II and IV only
4. D
   III and IV only

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1. A
   reduce the error due to expansions of glass because of heat.
2. B
   obtain the boiling point accurately even in much a shorter time.
3. C
   make sure that boiling point obtained is accurate even when water sample contains non-volatile impurities dissolved.
4. D
   reduce the error due to atmospheric pressure.

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1. A
   Melting temperature
2. B
   Boiling temperature
3. C
   Critical pressure
4. D
   Critical temperature

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