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Match List - I with List - II.

List - I

List - II
\mathrm{(A) \: \mathrm{Cd}(\mathrm{s})+2 \mathrm{Ni}(\mathrm{OH})_{3}(\mathrm{~s}) \rightarrow \mathrm{CdO}(\mathrm{s})+2 \mathrm{Ni}(\mathrm{OH})_{2}(\mathrm{~s})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})}

(I) Primary battery
\mathrm{(B) \: \mathrm{Zn}(\mathrm{Hg})+\mathrm{HgO}(\mathrm{s}) \rightarrow \mathrm{ZnO}(\mathrm{s})+\mathrm{Hg}(\mathrm{l})}

(II) Discharging of secondary battery
\mathrm{(C) \: 2 \mathrm{PbSO}_{4}(\mathrm{~s})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{Pb}(\mathrm{s})+\mathrm{PbO}_{2}(\mathrm{~s})+2 \mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{aq})}

(III) Fuel cell
\mathrm{(D) \: 2 \mathrm{H}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})}

(IV) Charging of secondary battery

Choose the correct answer from the options given below :
 

Option: 1

(\mathrm{A})-(\mathrm{I}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})


Option: 2

(\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{III})


Option: 3

(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{III})


Option: 4

(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})


Answers (1)

\mathrm{a)\; }\mathrm {Cd}(\mathrm{s})+2 \mathrm{Ni}(\mathrm{OH})_3 \rightarrow \mathrm{CdO}+2 \mathrm{Ni}(\mathrm{OH})_2+\mathrm{H}_2 \mathrm{O}
      Discharge of secondary battery

\mathrm{(b) \: \mathrm{Zn}(\mathrm{Hg})+\mathrm{HgO}(\mathrm{s}) \rightarrow \mathrm{ZnO}(\mathrm{s})+\mathrm{Hg}(\mathrm{l})}
        This is primary battery

\mathrm{(c) \: 2 \mathrm{PbSO}_{4}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{Pb}(\mathrm{s})+\mathrm{PbO}_{2}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{aq})}
        This represents charging of secondary battery

\mathrm{(d) \: 2 \mathrm{H}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})}
       This is an example of fuel cell.

Hence option (C) is correct.



       

Posted by

Kshitij

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