Question

Which of the following statement is correct?
(A) The decrease in size of an object on heating is called contraction.
(B) The change involving dissolving salt in water can be reversed by evaporation.
(C) No new substance is formed when sugar is dissolved in water.
(D) The change involving dissolving salt in water can be reversed by heating and melting of salt.

OPTIONS:
(A) A and B
(B) B and C
(C) C and D
(D) A and D

Answer 1

Answer:

(B) B and C

Explanation:

(a) Because decrease in size of an object (metals only) occurs during cooling not on heating.

(d) Because dissolving of salt in water can be reversed by evaporation not by melting.

Hope you understand

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