Q. In the following reactions, reactants $A,\ B\$and $C$ are: ${Cl}_{2}H_{5}NH_{2} + A \longrightarrow C_{2}H_{5}N = CH - C_{6}H_{5} + H_{2}O$ Urea +$B \longrightarrow H_{2}N - NHCONH_{2} + NH_{3}$ $CH_{2}H_{5}NH_{2} + C \longrightarrow C_{2}H_{5}Cl + H_{2}O + N_{2}$
A) $CH_{3}CHO,NH_{2} - NH_{2}and\ PCl_{5}$
B) $C_{6}H_{5}CHO,\ NH_{2} - NH_{2}and\ SOCl_{2}$
C) $C_{6}H_{5}CHO,\ NH_{2} - NH_{2}and\ NOCl_{\ }$
D) $CH_{3}CHO,\ NH_{2} - NH_{2}and\ PCl_{3}$
Explanation
(c)
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ H$
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$C_{2}H_{5}NH_{2} + O = C - C_{6}H_{5} \rightarrow C_{2}H_{5}N = HCC_{6}H_{5} + H_{2}O$
Benzaldehyde
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (A)$
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$C_{2}H_{5}NH_{2} + NOCl \rightarrow C_{2}H_{5}Cl + H_{2}O + N_{2}$
(C)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.