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1.
Which one of the following is the mode of heat transfer in which warm material is transported so as to displace a cooler material?
2.
Low temperatures (cryogenics) find application in:
3.
Which zone of a candle flame is the hottest?
4.
Which one among the following denotes the smallest temperature?
5.
Assertion [A]: Steam is more harmful for human body than the boiling water in case of bum.
Reason [R]: Boiling water contains more heat than steam.
Reason [R]: Boiling water contains more heat than steam.
6.
Assertion [A]: In a pressure cooker food is cooked above boiling point.
Reason [R]: Boiling point of water increases as the pressure increases
Reason [R]: Boiling point of water increases as the pressure increases
7.
Which one among the following statements about thermal conductivity is correct?
8.
Cloudy nights are warmer compared to clear cloudless nights, because clouds:
9.
A solid is melted (above the melting point) and allowed to cool down at normal condition. Its variation of temperature as a function of times is as shown in the figure given below. What is the reason for the plateau (flat position) in the central region of the cooling curve as shown in the figure?
10.
If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?