GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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matter loses mass
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heat is added
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it doesn’t change
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by doing nothing
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Detailed explanation-1: -Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas). This change is called BOILING.
Detailed explanation-2: -Heating a substance makes its atoms and molecules move faster. This happens whether the substance is a solid, a liquid, or a gas.
Detailed explanation-3: -The heat required to change the state of a substance at constant temperature is called latent heat. Q. The amount of heat required to change from liquid state to gaseous state without rise in its temperature is called latent heat of vaporisation.
Detailed explanation-4: -Matter changes from one state to another by change in temperature and pressure. For e.g. solids on heating changes to liquid, liquid on further heating changes to gases.