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B
SnO⋅CoO
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C
ZnO⋅CoO
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D
MgO⋅CoO
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Solution
The correct option is DZnO⋅CoO (A) is ZnCO3 and (B) is ZnO ZnCO3⟶ZnO+CO2(A)(B) ZnO+2NaOH⟶Na2ZnO2+H2O 2Co(NO3)2⟶2CoO+4NO2+O2 ZnO+CoOOncharcoal−−−−−−−→cavityZnO⋅CoO