1.

In which of the reactions, the enthalpy is the least

Answer»

`CH_(3)COOH + NaOHrArr CH_(3)COONa + H_(2)O`
`HCl + NH_(4)OH rArr NH_(4)CL + H_(2)O`
`HCl + NaOHrArr NACL + H_(2)O`
`HCN + NH_(4)OH rarr NH_(4)CN + H_(2)O`

Answer :C


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