Question 11 MarkEruption of a volcano is a reversible change. True/ FalseAnswerFalse.View full question & answer→
Question 21 MarkFormation of clouds is an irreversible change. True/ FalseAnswerFalse.View full question & answer→
Question 31 MarkCooking of rice is a physical change. True/ FalseAnswerFalse.View full question & answer→
Question 41 MarkPressure is equal to the force per unit second. True/ FalseAnswerFalse.View full question & answer→
Question 51 MarkCooling the hot milk is a reversible change. True/ False.AnswerTrue.View full question & answer→
Question 61 MarkMilk to paneer is a reversible change. True/ False.AnswerFalse.View full question & answer→
Question 81 MarkAll changes around us can be reversed. True/ False.AnswerFalse.View full question & answer→
Question 91 MarkShortening the length of dress by folding it is not a reversible change. True/ False.AnswerFalse.View full question & answer→
Question 101 MarkRaw egg is boiled. We can reverse this change. True/ False.AnswerFalse.View full question & answer→
Question 111 MarkA sheet of paper is changed into a toy aeroplane by folding it. This is a reversible change. True/ False.AnswerTrue.View full question & answer→
Question 121 MarkEvaporation of water is reverse of condensation of water. True/ False.AnswerTrue.View full question & answer→
Question 131 MarkChange of seasons is a natural change. True/ FalseAnswerTrue.View full question & answer→
Question 141 MarkBy heating a substance or mixing it with some other substance, changes may occur in it. True/ False.AnswerTrue.View full question & answer→
Question 151 MarkConversion of a solid to liquid by heating is called fusion. True/ FalseAnswerTrue.View full question & answer→
Question 161 MarkSome changes can be reversed, some cannot be reversed. True/ False.AnswerTrue.View full question & answer→
Question 171 MarkRipening of apple is a reversible change. True/ False.AnswerFalse.View full question & answer→
Question 181 MarkBreaking of a China (porcelain) dish is a chemical change. True/ FalseAnswerFalse.View full question & answer→
Question 191 MarkRusting of iron is an irreversible change. True/ FalseAnswerTrue.View full question & answer→