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Rishabh from tsms, noida
Subject :NSO    Class : Class 6

Expansion on heating, contraction on cooling and change of state is

(A) Chemical change

(B) Permanent change

(C) Reversible change

(D) Irreversible change.

Ans 1:

Siddhant from dav public school velacherry, CHENNAI
Class : Class 6
c

Ans 2:

Tanishkchamp from Saint Francis English medium school, Bandikui
Class : Class 8
Reversible change

Ans 3:

Sobia khan from Sardar Patel Vidyalaya, New Delhi
Class : Class 7
C) reversible change

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