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Q.

The formation of water from H2(g) and O2(g) is an exothermic reaction because

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a

H2(g) and O2 (g) have a higher chemical energy than water

b

Energy considerations does not arise

c

H2(g) and O2(g) have a lower chemical energy than water

d

H2(g) and O2(g) have a higher temperature than water

answer is A.

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Detailed Solution

energy of reactants is greater than energy of products reaction is exothermic

energy of H2 and O2 is higher than energy of H2O

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