Question 11 MarkBlack surfaces are the poor absorbers of heat radiations.AnswerFalse.View full question & answer→
Question 21 MarkLiquids are heated by conduction and radiation.AnswerFalse.View full question & answer→
Question 31 MarkLand and sea breezes are convection currents of cold and warm air.AnswerTrue.View full question & answer→
Question 41 MarkMedium is necessary for the transfer of heat by radiation.AnswerFalse.View full question & answer→
Question 71 MarkA mercury thermometer makes use of the property of the expansion of liquids on heating.AnswerTrue.View full question & answer→
Question 81 MarkSolids expand the least and gases expand the most on being heated.AnswerTrue.View full question & answer→
Question 91 MarkEqual volumes of different liquids expand by different amounts when they are heated to the same rise in temperature.AnswerTrue.View full question & answer→
Question 101 MarkTelephone wires are kept tight between the two poles in summer.AnswerFalse.View full question & answer→
Question 111 MarkAll solids expand by the same amount when heated to the same rise in temperature.AnswerFalse.View full question & answer→
Question 121 MarkHeat flows from a body at a high temperature to a body at a low temperature when they are kept in contact. AnswerTrue. View full question & answer→
Question 131 MarkOn touching a lump of ice, we feel cold because some heat passes from our body to the ice.AnswerTrue.View full question & answer→