The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products ? (a) (b) (c) (d) (A) (a) and (d) (B) (a), (c) and (d) (C) (b) and (c) (D) (c) and (d)

Question

The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products ? (a) (b) (c) (d)

(A) (a) and (d)
(B) (a), (c) and (d)
(C) (b) and (c)
(D) (c) and (d)

Prashant Kotian · Accepted Answer

Correct answer: D. (a) CN CH2 – NH2 LiAlH4 (N – present in product so will show Kjeldhal Test) (b) NH2 N2Cl– + NaNO2 HCl ( –N Never show Kjeldhal Test) (c) CH2 – CN SnCl2 HCl CH2 – CHO (N–abscent, wo will not show Kjeldhal Test) | JEE MAIN-2020 | DATE : 03-09-2020 (SHIFT-1) | PAPER-1 | OFFICIAL PAPER | CHEMISTRY PAGE # 5 (d) CN H2/Ni CH2 – NH2 (will give positive Kjeldhal test due to presence of –NH2 group)

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