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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_______________


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.

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