Stoichiometry
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will

Decrease three fold
Increase nine fold
Increase three fold
Remain unaltered

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

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