Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Diethyl ether is obtained by the reaction of (1) sodium ethoxide with methyl iodide (2) sodium ethoxide with ethyl chloride (3) ethanol with red phosphorus (4) ethanol with cone.\[{{H}_{2}}S{{O}_{4}}\]A) 1, 2 and 3 are correct.
B) 1 and 2 are correct.
C) 2 and 4 are correct.
D) 1 and 3 are correct.
Correct Answer: C
Solution :
(1) \[\underset{sodiumethoxide}{\mathop{{{C}_{2}}{{H}_{5}}ONa}}\,+\underset{methyl\,iodide}{\mathop{C{{H}_{3}}I}}\,\xrightarrow{{}}\underset{\begin{smallmatrix} Methyl\text{ }ethyl \\ \,\,\,\,\,\,\,ether \end{smallmatrix}}{\mathop{{{C}_{2}}{{H}_{5}}OC{{H}_{3}}}}\,+NaI\] (2) \[\underset{\begin{smallmatrix} Sodium \\ ethoxide \end{smallmatrix}}{\mathop{{{C}_{2}}{{H}_{5}}ONa}}\,+\underset{ethyl\text{ }chloride}{\mathop{{{C}_{2}}{{H}_{5}}Cl}}\,\xrightarrow[{}]{{}}\] \[\underset{diethyl\,ether}{\mathop{{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}}}\,+NaCl\] (3) \[\underset{ethanol}{\mathop{{{C}_{2}}{{H}_{5}}OH}}\,\xrightarrow{\operatorname{Re}d\,P/HI}\underset{ethane}{\mathop{{{C}_{2}}{{H}_{6}}}}\,\] (4) \[\underset{ethanol}{\mathop{{{C}_{2}}{{H}_{5}}OH}}\,+\underset{conc}{\mathop{{{H}_{2}}S{{O}_{4}}}}\,\xrightarrow{{{140}^{o}}C}\] \[\underset{diethyl\text{ }ether}{\mathop{{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}}}\,+{{H}_{2}}O\]
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