For which one of the following enthalpy changes, $Δ H$ can be positive or negative
(A) Enthalpy of formation
(B) Enthalpy of solution
(C) enthalpy of combustion

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A, B & C

A only

B only

A & B only

answer is D.

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Detailed Solution

Enthalpy of solution and enthalpy of formation can be positive or negative but enthalpy of combustion is always negative because combustion reaction is exothermic in nature.

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