Stoichiometry
The evaporation of aqueous solution of sugar causes its molarity to

Remain unchanged.
increase.
Decrease.
Either A or B; depends on the concentration of the solution.

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Stoichiometry
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because

The strong base and strong acid reacts in aqueous solution
Only OH⁻ and H⁺ ions react in every case
The strong base and strong acid reacts completely
The salt formed does not hydrolyse

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