What is $\mathrm{X}$ in the following conversion?

What is $\mathrm{X}$ in the following conversion?

$\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}, \mathrm{H}_{2} \mathrm{SO}_{4} / \mathrm{H}_{2} \mathrm{O}$
$\mathrm{HIO}_{4}$
$\mathrm{PCC} / \mathrm{CH}_{2} \mathrm{Cl}_{2}$
$\mathrm{OsO}_{4},\left(\mathrm{CH}_{3}ight)_{3} \mathrm{C} . \mathrm{COOH},\left(\mathrm{CH}_{3}ight)_{3} \mathrm{COH}, \mathrm{OH}$

Solution

Pyridinium chloro chromate selectively oxidises a primary alcohol to an aldehyde e.g.

.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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