Calculations(Neutralisation)

Which of the following reactions is a neutralisation reaction?

Use Of Double Indicators In Neutralisation

A sample of sodium carbonate contains sodium also. 1.5 g of the sample is dissolved in water and volume raised to 250 mL. 25 mL of this solution requires 20 mL of (N)/(10)H_(2)SO_(4) solution for neutralisation. Calculate the percentage of sodium carbonate in the sample.

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

Assertion:The enthalpies of neutralised of strong acids and strong bases are always same. Reason:Neutralisation is heat of formation of water.