Match the following-

List - I	List - II
A. Potential of hydrogen electrode at pH = 10	i. 0.76 V
B. Cu2+  | Cu	ii. 0.059
C. Zn | Zn2+	iii. -0.591 V
D. $\frac{2.303 \mathrm{RT}}{\mathrm{F}}$	iv. 0.037 V v. -0.76 V

• A - iii; B - i; C - ii; D - v

• A - ii; B - v; C - i; D - iv

• A - iii; B - iv; C - i; D - ii

• A - v; B - i; C - iv; D - ii

If the values of ${\wedge }_{\infty }$ of NH₄Cl, NaOH and NaCl are 130, 217 and 109 ohm^-1 cm² equiv^-1 respectively, the ${\wedge }_{\infty }$ of NH₄OH in ohm^-1 cm² equiv^-1 is

• 238

• 196

• 22

• 456

143.

During the electrolysis of copper sulphate aqueous solution using copper electrode, the reaction taking place at the cathode is

• Cu → Cu²⁺ (aq) + 2e^-

• Cu²⁺ (aq) + 2e^- → Cu (s)

• H⁺ (aq) + e^- → $\frac{1}{2}$ H₂ (g)

• SO${}_4^{2-}$ (aq) → SO₃ (g) + $\frac{1}{2}$O₂ (g) + 2e^-

The extent of charge of lead accumulator is determined by

• amount of PbSO₄ in the battery

• amount of PbO₂ in the battery

• specific gravity of H₂SO₄ of the battery

• amount of Pb in the battery

The emf (in V) of a Daniell cell containing 0.1 M ZnSO₄ and 0.01 M CuSO₄ solutions at their respective electrodes is

$({\mathrm{E}}_{{\mathrm{Cu}}^{2+}/\mathrm{Cu}}^{°}= + 0.34 \mathrm{V}; {\mathrm{E}}_{{\mathrm{Zn}}^{2+}/ \mathrm{Zn}}^{°} = -0.76\mathrm{V})$

• 1.10

• 1.16

• 1.13

• 1.07

The role of copper diaphragm in Whytlaw-Gray's method is

• preventing the corrosion of electrolytic cell

• preventing the mixing of H₂ and F₂

• as anode

• as cathode

At 298 K the molar conductivities at infinite dilution (${\mathrm{\Lambda }}_{\mathrm{m}}^{°}$) of NH₄Cl, KOH and KCl are 152.8, 272.6 and 149.8 S cm² mol^-1respectively. The ${\mathrm{\Lambda }}_{\mathrm{m}}^{°}$ of NH₄OH in Scm² mol^-1 and % dissociation of 0.01 M NH₄OH with ${\mathrm{\Lambda }}_{\mathrm{m}}$= 25.1 S cm² mol^-1 at the same temperature are

• 275.6, 0.91

• 275.6, 91

• 266.6, 96

• 30, 84

The products obtained at the cathode and anode respectively during the electrolysis of aqueous K₂SO₄ solution using platinum electrodes are

• O₂, H₂

• H₂, O₂

• H₂, SO₂

• K₂, SO₂

Same amount of electricity is passed through aqueous solutions of AgNO₃ and CuSO₄. The number of Ag and Cu atoms deposited are x and y respectively. The correct  relationship between x and y is

• x <y 

• x= 2y

• x = y

• y = 2x

In the acidic solution of copper sulphate and alkaline solution of copper cyanide respectively same electric current is flown for a definite time, which of the following statement is correct for this?

• Amount of copper deposited in both the solution is the same

• Amount of copper deposited in alkaline copper cyanide solution is less

• Amount of copper deposited in acidic copper sulphate solution is less

• None of the above