The correct increasing order of reducing power of the metals is:

K+/K = –2.93 V

Ag+/Ag = 0.80 V

Hg2+/Hg = 0.79 V

Mg2+/Mg = –2.37 V

Cr3+/Cr = – 0.74 V

1. Cr < Mg < K < Ag < Hg

2. Mg < K < Ag < Hg < Cr

3. K < Ag < Hg < Cr < Mg

4. Ag < Hg < Cr < Mg < K

The correct statement about the given galvanic cell equation is -

Zn_(s) + 2Ag⁺­­­_(aq) → Zn²⁺_(aq) + 2Ag_(s)

 2Cr(s) + 3Cd²⁺(aq) → 2Cr³⁺(aq) + 3Cd

${{\mathrm{E}}^{⊝}}_{{\mathrm{Cr}}^{3+}/\mathrm{Cr}}= -0.74 \mathrm{V}$; ${{\mathrm{E}}^{⊝}}_{{\mathrm{Cd}}^{2+}/\mathrm{Cd}}=-0.40 \mathrm{V}$

The value of $∆{\mathrm{G}}_r^{\mathrm{o}}$ in the above reaction will be - 

1. -196.83 kJ

2. 196.83 kJ

3. 186.83 kJ

4. -186.83 kJ

The incorrect statement(s) among the below is/are:

1. a

2. a and d

3. b and d

4. a and c

The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 S cm^–1. The molar conductivity will be -

1. 124 S cm² mol^-1

2. 134 S cm² mol^-1

3. 128 S cm² mol^-1

4. 136 S cm² mol^-1

The electricity required in coulombs for the oxidation of 1 mole of FeO to ${\mathrm{Fe}}_2{\mathrm{O}}_{\mathrm{3 }}$is-

1. 964.87 C

2. 96487 C

3. 96.487 C

4. 9.6487 C

The value of E_cell in the reaction below will be:

\(\small{Pt(s)|Br^{-}(0.010 \ M)|Br_{2}(l) \ ||H^{+}(0.030 \ M)|H_{2}(g)(1 \ bar)|Pt(s)}\)

\(E_{Br^{-}/Br_{2}}^{o} \ = \ -1.09 \ V\)

1. +1.298 V 

2. -1.398 V

3. -1.298 V

4. -1.198 V

The value of  ∆G°  in the reaction below would be:
Zn(s) + Ag₂O(s) + H₂O(l) → Zn⁺²(aq) + 2Ag(s) + 2OH^-(aq)

Given: \(E_{cell}^{\circ} = 1.04V\)

1. -2.13 kJ

2. -21.3 kJ

3. -213.04 kJ

4. -31.12 kJ

The mass of nickel deposited by electrolysis of a solution of $\mathrm{Ni}{\left({\mathrm{NO}}_3\right)}_2$ using a current of 5 amperes for 20 min is (atomic mass of Nickle is 58.7) -

1. 2.42 g

2. 1.82 g

3. 3.93 g

4. 6.42 g

Three electrolytic cells A, B, C containing solutions of ZnSO₄, AgNO₃, and CuSO₄, respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver was deposited at the cathode of cell B. The current flow time is-

1. 14 minutes

2. 25 minutes

3. 20 minutes

4. 11 minutes