Which of the following methods give a carboxylic acid without homologation?

Options

A. `RCH_(2)OH overset(Cr_(2)O_(7)^(2-)//H_(3)O^(+))to`
B. `RCH_(2)Br overset(CN^(-),H_(3)O^(+))to`
C. `CH_(3)OH underset("Rhcatalyst",I^(-))overset(CO,"pressure")to`
D. `CH_(3)CH_(2)ONa underset("pressure")overset(CO,Delta)toX overset(H_(2)O^(+))to`

Answer

A

Explanation

`RCH_(2)OH overset(Cr_(2)O_(7)^(2-)//H_(2)O^(+))to RCOOH` same number of carbon atom.
`CH_(3)OH+CO underset(450K,30-40"bar") overset(Rh" catalyst",I^(-))to CH_(3)COOH` (monsanto.s acetic acid process)
`RONa +CO underset("temp.")overset("Pressure")to RCOONa overset(H_(3)O^(+))to RCOOH`