JEE Advanced 2020 Full Test 4 Paper 2

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Question : 26 of 54

Marks: +1, -0

Which of the following reaction(s) is/are exothermic in nature?

CH2=CH2(g)+H2(g)
Ni
⟶
C2H6(s)
NaOH+HCN⟶NaCN+H2O
HCl+H2O⟶H+(aq)+Cl−(aq)
H2(g)⟶H(g)+H(g)

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