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Question
Fill in the blanks :
(a) The process of a liquid changing into a solid is called___ ___ ___ ___ ___
(b) A change which alters the composition of a substance is known as a ___ ___ ___ ___ ___ change
(c) There is no change in the ___ ___ ___ ___ of the substance during a physical change.
(d) The reaction in which energy is evolved is called___ ___ ___ ___ ___
Fill in the blanks :
(a) The process of a liquid changing into a solid is called
(b) A change which alters the composition of a substance is known as a
(c) There is no change in the
(d) The reaction in which energy is evolved is called
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Solution
(a) The process of a liquid changing into a solid is called freezing.
(b) A change, which alters the composition of a substances, is known as a chemical change.
(c) There is no change in the composition of the substance during a physical change.
(d) The reaction in which energy is evolved is called exothermic reaction.
(b) A change, which alters the composition of a substances, is known as a chemical change.
(c) There is no change in the composition of the substance during a physical change.
(d) The reaction in which energy is evolved is called exothermic reaction.
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