The Lassaigne's extract is boiled with dil. \( \mathrm{HNO}_{3} \) before testing for halogens b....

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The Lassaigne's extract is boiled with dil. \( \mathrm{HNO}_{3} \) before testing for halogens because
\( \mathrm{P} \)
(1) \( \mathrm{AgCN} \) is soluble in \( \mathrm{HNO}_{3} \)
(2) Silver halides are soluble in \( \mathrm{HNO}_{3} \)
(3) \( \mathrm{NaCN} \) and \( \mathrm{Na}_{2} \mathrm{~S} \) are decomposed by \( \mathrm{HNO}_{3} \)
(4) \( \mathrm{Ag}_{2} \mathrm{~S} \) is soluble in \( \mathrm{HNO}_{3} \)


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