A) \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}\]
B) \[LiAl{{H}_{4}}\]
C) \[Cr{{O}_{3}}\]-pyridine
D) \[KMn{{O}_{4}}\]
Correct Answer: C
Solution :
Alcohols can be oxidised into aldehydes by reagents such as \[CrO_{3}^{-}\]- pyridine, acidified \[KMn{{O}_{4}},\,PCC\] etc. \[C{{H}_{3}}-C{{H}_{2}}-\underset{2-methyl-pentanol}{\mathop{C{{H}_{2}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}OH}}\,\] \[\xrightarrow[Cr{{O}_{3}}-pyridine]{[O]}C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}-CHO\]
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