1.

In which of the following reactions, the heat liberated is known as ''heat of combustion''.

Answer»

`H_((AQ))^(+)+OH_((aq))^(-)rarrH_(2)O_((l))+"heat"`
`C("graphite")+(1)/(2)O_(2(G))rarrCO_((g))+"heat"`
`CH_(4(g))+2O_(2(g))rarrCO_(2(g))+2H_(2)O_((l))+"heat"`
`H_(2)SO_(4(aq))+H_(2)O_((l))rarrH_(2)SO_(4(aq))+"heat"`

Answer :C


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