Question

Choose the disproportionation reaction among the following redox reactions

• A. $3 Mg ( s )+ N _2( g ) \longrightarrow Mg _3 N _2( s )$
• B. $P _4( S )+3 NaOH _{( ag )}+3 H _2 O ( l ) \longrightarrow PH _{3( g )}+3 NaH _2 PO _2( aq )$
• C. $Cl _{2( g )}+2 KI ( aq ) \longrightarrow 2 KCl _{( aq )}+ I _2( s )$
• D. $Cr _2 O _{3( s )}+2 Al _{( s )} \longrightarrow Al _2 O _{3 ( s )}+2 Cr _{( s )}$
• E. $2 NaH _{( s )} \longrightarrow 2 Na _{( s )}+ H _{2( g )}$

Answer 1

Answer: (B)

$P _{4( S )}+3 NaOH _{( aq )}+3 H _{2 O ( l )} \longrightarrow PH _{3( g )}+3 NaH _2 PO _{2( aq )}$