Question

Assertion :Hydroxylamine $\left(N{H}_{2}OH\right)$ contains N, and hence gives Prussian blue colour in Lassaigne's test. Reason: Hydroxylamine does not contain C, so with Na metal, $C{N}^{⊝}$ ion is not formed

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is D Assertion is incorrect but Reason is correct

Lassaigne's test:
A compound containing diazo compounds can not be tested by this so
hydroxylamine ($N{H}_{2}OH$) doesn't give a positive test for N since it does not contain C. So $C{N}^{⊝}$ ion is not obtained which is an essential condition for the test for N. But (R) is correct.