Heat Test - 5...

The amount of ice (at 0^oC) that can be melted by 4000 calories of heat (latent heat of fusion of ice is 80 cal/g) is

How many joules of energy are equal to 2.5 calories?

If the amount of heat required for heating certain amount of water is 6750 cal, what amount of heat is required in kJ?

For which of the following modes of transfer of heat is a medium required?

Which of the following are bad conductors of heat?
(i) Mercury
(ii) Trapped air
(iii) Wood
(iv) Iron
(v) Asbestos

Which of the following statements is NOT true?

In summer, if a wooden chair and an iron chair are both kept in sun and then touched, the iron chair appears to be warmer than the wooden chair. This is because

Which of the following is not a consequence of convection?

Which of the following is not a consequence of convection?

Why are two thin blankets put together warmer than one blanket of double the thickness?

Why is it preferred to wear light coloured clothes in summers?

How does a hot utensil kept away from the flame cools down?

If half of a slab of ice is covered with a white cloth and the other half is covered with a black cloth, which of the following statements is correct?

A drop of water is sprinkled on a red hot iron plate. The drop forms a small sphere but does not vaporise immediately. Why?

Which of the following statements is TRUE?

Which of the following represents the smallest temperature change?