Heat of neutralisation is least when

The heat of neutralisation is maximum when

The heat of neutralisation is maximum when

The heat of neutralisation is constant when dilute solution of

Assertion(A) : Heat of neutralisation is always less than zero. Reason(R ) : Neutralisation involves reactions between an acid and a base.

The heat of neutralisation is highest in

Assertion : Enthalpy of neutralisation of 1 equivalent each of HCl and H_(2)SO_(4) with NaOH is same Reason : Enthalpy of neutralisation is always the heat evolved when 1 mole acid is neutralised by a base.