1. Tardigrade
  2. Question
  3. Chemistry
  4. Match List-I with List-II. List-I List-II A Cd ( s )+2 Ni ( OH )3( s ) arrow CdO ( s )+ 2 Ni ( OH )2( s )+ H 2 O (l) I Primary battery B Zn ( Hg )+ HgO ( s ) arrow ZnO ( s )+ Hg (l) II Discharging of secondary battery C 2 PbSO 4( s )+2 H 2 O (l) arrow Pb ( s )+ PbO 2( s )+2 H 2 SO 4( aq ) III Fuel cell D 2 H 2( g )+ O 2( g ) arrow 2 H 2 O ( l ) IV Charging of secondary battery Choose the correct answer from the options given below :

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Q. Match List-I with List-II.$
List-I List-II
A $ Cd ( s )+2 Ni ( OH )_3( s ) \rightarrow CdO ( s )+ 2 Ni ( OH )_2( s )+ H _2 O (l)$ I Primary battery
B $Zn ( Hg )+ HgO ( s ) \rightarrow ZnO ( s )+ Hg (l)$ II Discharging of secondary battery
C $ 2 PbSO _4( s )+2 H _2 O (l) \rightarrow Pb ( s )+ PbO _2( s )+2 H _2 SO _4( aq )$ III Fuel cell
D $ 2 H _2( g )+ O _2( g ) \rightarrow 2 H _2 O ( l )$ IV Charging of secondary battery
Choose the correct answer from the options given below :

JEE MainJEE Main 2022Electrochemistry

Solution:

(a) $Cd ( s )+2 Ni ( OH )_3( s ) \rightarrow CdO ( s )+$
$2 Ni ( OH )_2( s )+ H _2 O ( l )$
Discharge of secondary Battery
(b) $Zn ( Hg )+ HgO$ (s) $\rightarrow ZnO ( s )+ Hg (l)$
(Primary Battery Mercury cell)
(c) $2 PbSO _4( s )+2 H _2 O (l) \rightarrow Pb ( s )+ PbO _2( s )$ $+2 H _2 SO _4( aq )$
Charging of secondary Battery
(d) $2 H _2( g )+ O _2( g ) \rightarrow 2 H _2 O (l)-$ Fuel cell