The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are, in order,

Correct answer: (D) (D) C2H5OH, C2H5ONa, C2H5Cl. Answer: (D) C2H5OH, C2H5ONa, C2H5Cl Solution: A is ethanol. With sodium it gives sodium ethoxide (B): 2C2H5OH + 2Na -> 2C2H5ONa + H2 With PCl5 ethanol gives ethyl chloride (C): C2H5OH + PCl5 -> C2H5Cl + POCl3 + HCl B and C then undergo Williamson synthesis (S_N2) to give diethyl ether: C2H5ONa + C2H5Cl -> C2H5-O-C2H5 + NaCl

NEET 2018 · ChemistryPrevious Year Question

The compound A on treatment with $Na$ gives B, and with $PCl X_{5}$ gives C. B and C react together to give diethyl ether. A, B and C are, in order,

Answer: (D) (D) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{5} ONa$ , $C X_{2} H X_{5} Cl$ . \textbf{Answer:} (D) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{5} ONa$ , $C X_{2} H X_{5} Cl$ \textbf{Solution:} A is ethanol.

A.(A) $C X_{2} H X_{5} Cl$ , $C X_{2} H X_{6}$ , $C X_{2} H X_{5} OH$
B.(B) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{5} Cl$ , $C X_{2} H X_{5} ONa$
C.(C) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{6}$ , $C X_{2} H X_{5} Cl$
D.(D) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{5} ONa$ , $C X_{2} H X_{5} Cl$ ✓

Correct Answer

(D) (D) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{5} ONa$ , $C X_{2} H X_{5} Cl$

Solution & Explanation

\textbf{Answer:} (D) $C X_{2} H X_{5} OH$ , $C X_{2} H X_{5} ONa$ , $C X_{2} H X_{5} Cl$ \textbf{Solution:} A is ethanol. With sodium it gives sodium ethoxide (B): $2 C X_{2} H X_{5} OH + 2 Na 2 C X_{2} H X_{5} ONa + H X_{2}$ With $PCl X_{5}$ ethanol gives ethyl chloride (C): $C X_{2} H X_{5} OH + PCl X_{5} C X_{2} H X_{5} Cl + POCl X_{3} + HCl$ B and C then undergo Williamson synthesis ( $S_{N} 2$ ) to give diethyl ether: $C X_{2} H X_{5} ONa + C X_{2} H X_{5} Cl C X_{2} H X_{5} - O - C X_{2} H X_{5} + NaCl$

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The compound A on treatment with Na gives B, and with PClX5​ gives C. B and C react together to give diethyl ether. A, B and C are, in order,

Solution & Explanation

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The compound A on treatment with $Na$ gives B, and with $PCl X_{5}$ gives C. B and C react together to give diethyl ether. A, B and C are, in order,