Q.3 In electrolysis of aqueous CuCl2, the metal deposited at cathode is
A) Sodium C) Lead
B) Aluminium D) Copper
Q.4 In MgCl2, the oxidation state of ‘Cl’ is
A) Zero C) -2
B) +2 D) -1
A) Sodium C) Lead
B) Aluminium D) Copper
Q.4 In MgCl2, the oxidation state of ‘Cl’ is
A) Zero C) -2
B) +2 D) -1
Q.5 In the figure given below, the electron flow in external circuit is from:
A) Copper to zinc electrode C) Porous partition to zinc electrode
B) Right to left D) Zinc to copper electrode
Q.6 Which one of the following is a redox reaction?
A) NaCl + AgNO3 NaNO3 + AgCl2 C) 2Na + Cl2 2NaCl
B) 2Cl― Cl2 + 2e― D) Na+ + 1e― Na
A) Copper to zinc electrode C) Porous partition to zinc electrode
B) Right to left D) Zinc to copper electrode
Q.6 Which one of the following is a redox reaction?
A) NaCl + AgNO3 NaNO3 + AgCl2 C) 2Na + Cl2 2NaCl
B) 2Cl― Cl2 + 2e― D) Na+ + 1e― Na
Q.7 In SO4-2 the oxidation number of Sulphur is
A) -8 C) -6
B) +8 D) +6
Q.8 Coinage metals Cu, Ag, and Au are the least reactive because they have:
A) Negative reduction potential C) Negative oxidation potential
B) Positive reduction potential D) Positive oxidation potential
A) -8 C) -6
B) +8 D) +6
Q.8 Coinage metals Cu, Ag, and Au are the least reactive because they have:
A) Negative reduction potential C) Negative oxidation potential
B) Positive reduction potential D) Positive oxidation potential
Q.10 Keeping in mind the electrode potential, which one of the following reactions is feasible?
A) Zn+2 + Cu Cu+2 + Zn C) Fe + CuSO4 FeSO4 + Cu
B) Zn + MgSO4 ZnSO4 + Mg D) Cd + MgSO4 CdSO4 + Mg
A) Zn+2 + Cu Cu+2 + Zn C) Fe + CuSO4 FeSO4 + Cu
B) Zn + MgSO4 ZnSO4 + Mg D) Cd + MgSO4 CdSO4 + Mg
Q.12 10Clˉ +16H+ + 2MnO4ˉ 5Cl2 + 2Mn+2 + 8H2O
| A) Manganese is oxidized from +7 to +2 | C) Chlorine is reduced from zero to -1 |
| B) Chlorine ions are reduced from -1 to zero | D) Manganese is reduced from +7 to +2 |