Current Affairs JEE Main & Advanced

Category : JEE Main & Advanced

(1) Preparation                      

(i) From allyl halide

\[C{{H}_{2}}=CH-C{{H}_{2}}Br+{{H}_{2}}O\to \underset{\text{Allyl alcohol}}{\mathop{C{{H}_{2}}=CH-C{{H}_{2}}OH+HBr}}\,\]

(ii) By heating glycerol with oxalic acid :

\[\underset{C{{H}_{2}}OH}{\overset{C{{H}_{2}}OH}{\mathop{\underset{|\,\,\,\,\,}{\overset{|\,\,\,\,\,\,}{\mathop{CH}}}\,OH\,}}}\,\,\,+\begin{matrix}\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{HOOC}}\,  \\HOOC  \\\end{matrix}\xrightarrow{-2{{H}_{2}}O}\underset{C{{H}_{2}}OH\,\,\,}{\overset{C{{H}_{2}}OOC}{\mathop{\underset{|\,\,\,\,\,}{\overset{|\,\,\,\,\,\,}{\mathop{CH}}}\,OO\overset{|}{\mathop{C}}\,\,}}}\,\underset{-2C{{O}_{2}}}{\mathop{\xrightarrow{\text{Heat}}}}\,\underset{\text{Allyl alcohol}}{\mathop{\underset{C{{H}_{2}}OH}{\overset{C{{H}_{2}}\,\ \ \ \ }{\mathop{\underset{|\,\,\,\,\,}{\overset{|\,|\,\,\,\,\,}{\mathop{CH}}}\,\,\,\ \ \ \ \ }}}\,}}\,\]

(2) Physical properties

(a) It is colourless, pungent smelling liquid.

(b) It is soluble in water, alcohol and ether in all proportion.

(3) Chemical properties