Q.

Statement I: Heat of combustion of a reaction is always negative.
Statement II: Oxidation  of  N2 To give  NO  Is exothermic. 
 

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a

Both S I and S II are correct but S II is not correct explanation of S I

b

Both S I and S II  are correct and S II is correct explanation of S I

c

Statement I is correct but Statement II is wrong

d

Statement I is wrong but Statement II is correct

answer is A.

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Detailed Solution

No formation is exothermic due to high bond energy of N2 .

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