Question

$HCl$ cannot be used in place of $H_{2}S{O}_4$ in $KMn{O}_4$ titration, because

• A. $HCl$ will reduce Mohr's salt or oxalic acid
• B. $HCl$ will oxidise Mohr's salt or oxalic acid
• C. $HCl$ will reduce $KMn{O}_4$
• D. None of these

Answer 1

The correct option is C $HCl$ will reduce $KMn{O}_4$

If $HCl$ is used, it gets oxidised to $C{l}_2$
$\stackrel{+7}{2KMn{O}_4}+16HCl\to 2KCl+\stackrel{+2}{2MnC{l}_2}+8H_{2}O+5C{l}_2$