Question 1. A glass bottle containing water tightly corked breaks when it is kept in freezer, because _____.
(A) Glass is the bad conductor of heat
(B) The volume of water increases on freezing
(C) The volume of water decreases on freezing
(D) Bottle shrinks on freezing
Question 2. When a piece of ice floating in a glass of water melts, the level of water will ________.
(A) Fall or rise depends on the temperature of water
(B) Remain same
(C) Rise
(D) Fall
Question 3. Cloudy nights are warmer compared to clear cloudless nights, because clouds______.
(A) Absorb heat from the atmosphere and send it toward Earth
(B) Produce heat and radiate it towards Earth
(C) Reflect back the heat given off by Earth
(D) Prevent cold waves from the sky from descending on Earth
Question 4. The cloudy nights are warmer than clear nights because_______.
(A) The clouds obstruct the movement of air which creates heat
(B) Clouds make the atmosphere damp and generate heat
(C) Clouds absorb Sunlight during the day and radiate the same in night
(D) The clouds prevent radiation of heat from the ground and the air
Question 5. Fruit stored in a cold chamber exhibit longer storage life because_______.
(A) There is increase in humidity
(B) Rate of respiration is decreased
(C) Concentration of carbon dioxide in environment is increases
(D) Exposure to Sunlight is prevented
Question 6. A hydrogen inflated polythene balloon is released from the surface of the Earth. As the balloon rises to an altitude up in the atmosphere, it will_________.
(A) Maintain the same size and shape
(B) Increase in size
(C) Flatten into disc like shape
(D) Decrease in size
Question 7. Which one of the following statements is not correct?
(A) The velocity of sound in air is not affected by the change in amplitude and frequency
(B) The velocity of sound in air decreases as the humidity increases
(C) The velocity of sound in air is independent of pressure
(D) The velocity of sound in air increases with the increase of temperature
Question 8. Opening the door of refrigerator kept in the room_____.
(A) You can neither cool nor warm the room
(B) You are warm the room a little
(C) You can cool the room to the temperature of refrigerator
(D) You can cool the room to some degree
Question 9. If a gas is compressed to half of its original volume at 27ºC, to what temperature should it be heated to make it occupy its original, volume?
(A) 300ºC
(B) 54ºC
(C) 600ºC
(D) 327ºC
Question 10. The variations in temperature from 0ºC to 100ºC with respect to time of two liquids P, Q are shown in the graph given below. Which of the following statement is correct?
(A) Q attained the temperature of 100ºC faster than P
(B) P attained the temperature of 100ºC faster than Q
(C) At no point of time during heating did the two liquids have the same temperature
(D) During heating, liquid P has always warmer than Q
Question 11.
- Assertion (A): Woollen clothes keeps us warm.
- Reason(R): Woollen fibres are made from a special type of protein, which is a bad conductor of heat.
Select the correct answer from the codes given below.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 12. Consider the following statements.
- Steam at 100ºC and boiling water at 100ºC contain same amount of heat.
- Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
- In an air conditioner, heat is extracted from the room air at the evaporator coils and is ejected out at the condensor coils.
Which of these statements is/are correct?
(A) Only 3
(B) Only 2
(C) 2 and 3
(D) 1 and 2
Question 13.
- Assertion (A): The handle of pressure cooker is made up of Abonite.
- Reason (R): Abonite is a hard material.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 14.
- Assertion (A): With the increase of temperature, the viscosity of glycerin increases.
- Reason (R): Rise of temperature increases kinetic energy of molecules.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 15.
- Assertion (A): The boiling point of water decreases as the altitude increases.
- Reason (R): The atmospheric pressure increases with altitude.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 16. Consider the following statements.
- Assertion (A): Light coloured clothes are preferred in summer.
- Reason (R): Light colours are poor absorbers of heat.
Select correct answer from the code given below.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 17. Assertion and Reason are given below.
- Assertion (A): We prefer the white dress in winters.
- Reason (R): White dresses are good reflectors of heat. Which one among these is the right answer.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 18. An assertion and its reason is given below.
- Assertion (A): Salt is used for cooking the food at places on higher from sea level.
- Reason (R): Temperature is low in higher places.
Which one among these is right answer?
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 19.
- Assertion (A): A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter the copper piece appears hotter than the glass piece.
- Reason (R): The density of copper is more than that of glass.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 20. Consider the following statements.
- Assertion (A): Space based solar power (SBSP), it is suggested be made a national goal.
- Reason (R): Supply of SBSP is 99% uninterrupted throughout the year, besides the enormity of energy availability.
Select the correct answer using the codes given below.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 21.
- Assertion (A): Black hole is such a celestial existence which cannot be seen by telescope.
- Reason (R): The gravitational field of black hole is much strong that even light does not escape from it.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 22. Consider the following statements.
- Assertion (A): If ice collects in the freezer, the cooling in the refrigerator is affected adversely.
- Reason (R): Ice is a poor conductor.
Select the correct answer using the codes given below.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 23.
- Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.
- Reason (R): Ammonia can be liquefied at ambient tempera tures at low pressures.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)
Question 24.
- Assertion(A): A piece of ice added to the drink, cools it.
- Reason(R): Ice takes latent heat from the drink for melting resulting in the cooling of the drink.
Select the correct answer using the codes given below.
(A) (A) is false, but (R) is true
(B) (A) is true, but (R) is false
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
(D) Both (A) and (R) are true and (R) is the correct explanation of (A)