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Prashant Singh from ABR Foundation School , Sasaram
Subject :NSO    Class : Class 6

Which one of the following is true for all chemical reactions?

AThere is a change in volume
BHeat is evolved
CChemical bonds are broken or formed
DThere is a change in mass


Wrong

Ans 1:

hardik from M.P.V.M, Prayagraj
Class : Class 7
nothing to tell about which experiment

Ans 2:

Ishika patel from reliance foundation school, mumbai
Class : Class 7
How is heat not evolved, as heat is evolved in every chemical change?

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