Statement-1: ${NH}_{2} - {NH}_{2}$ gives prussian blue colour during Lassaigne test (element detection test).
Statement-2: NaCN gives prussian blue colour of ${Fe}_{4} {[Fe ({CN}_{6})]}_{3}$ with ${FeSO}_{4}, {FeCl}_{3}$ .

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Statement-1 is False, Statement-2 is True.

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is False.

Statement-1 is True, Statement-2 is True, Statement-2
is NOT a correct explanation for Statement-1.

answer is D.

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Detailed Solution

Since carbon is required for the Lassaigne test to generate NaCN, NH2NH2 does not produce the Prussian blue colour. With FeSO₄ and FeCl₃, NaCN does not produce the prussian blue colour of ${Fe}_{4} [Fe {(CN)}_{6}]_{3} .$

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