Question

Which of the following is an intermolecular radox reaction?

• A. $2 OCH - CHO \xrightarrow{\overline{ O}H } HOCH _{2}- CH _{2} OH$
• B. $2 C _{6} H _{5} CHO \xrightarrow{ Al \left( OC _{2} H _{5}\right)_{3}}C _{6} H _{5} COOH + C_6H_5CH_2OH$
• C. $4 CrO _{5}+6 H _{2} SO _{4} \longrightarrow 2 Cr _{2}\left( SO _{4}\right)_{3}+$ $6 H _{2} O +7 O _{2}$
• D. $As _{2} S _{3}+ HNO _{3} \longrightarrow H _{3} AsO _{4}+ H _{2} SO _{4}+ NO$

Answer 1

Answer: (D)

Intermolecular redox reaction involves oxidation of one molecule and reduction of the other molecule like in redox reactions.
$\overset{+3} {As} _{2} S _{3}+ H\overset{+5} {N}O _{3} \longrightarrow H _{3} \overset{+5} {As}O _{4}+ H _{2} SO _{4}+\overset{+2}{NO}$