A 4KOH,O₂ 2 B (Green) + 2H₂O 3 B 4HCl 2 C (Purple) + Mn O₂ + 2H₂O 2 C H₂O.KI 2 A (Purple) + 2KOH + D In the above sequence of reactions, A and D, respectively, are:

d- and f-Block Elements: JEE Main 2019 Chemistry question

JEE Main 2019 · 11 Jan, Evening shift · Q761

JEE Main 201911 Jan, Evening shiftChemistryMediumd- and f-Block Elements158× since 2002

\underline A \,\,\buildrel {4KOH,{O_2}} \over \longrightarrow \,\,\mathop {2\underline B }\limits_{\left( {Green} \right)} \,\, + \,\,2{H_2}O

3\underline B \,\,\buildrel {4HCl} \over \longrightarrow \,\,\mathop {2\underline C }\limits_{\left( {Purple} \right)} \,\, + \,\,Mn{O_2} + 2{H_2}O

2\underline C \,\,\buildrel {{H_2}O.KI} \over \longrightarrow \,\,\mathop {2\underline A }\limits_{\left( {Purple} \right)} \,\, + \,\,2KOH\,\, + \,\,\underline D

In the above sequence of reactions,

{\underline A }

and

{\underline D }

, respectively, are :

JEE Main 2019 d- and f-Block Elements Question with Solution (11 Jan Evening shift, Q761) | JEE Arc

JEE Main 2019 · 11 Jan, Evening shift · Q761

JEE Main 201911 Jan, Evening shiftChemistryMediumd- and f-Block Elements158× since 2002

\underline A \,\,\buildrel {4KOH,{O_2}} \over \longrightarrow \,\,\mathop {2\underline B }\limits_{\left( {Green} \right)} \,\, + \,\,2{H_2}O

3\underline B \,\,\buildrel {4HCl} \over \longrightarrow \,\,\mathop {2\underline C }\limits_{\left( {Purple} \right)} \,\, + \,\,Mn{O_2} + 2{H_2}O

2\underline C \,\,\buildrel {{H_2}O.KI} \over \longrightarrow \,\,\mathop {2\underline A }\limits_{\left( {Purple} \right)} \,\, + \,\,2KOH\,\, + \,\,\underline D

In the above sequence of reactions,

{\underline A }

and

{\underline D }

, respectively, are :