If mercury is used as cathode in the electrolysis of aqueous NaCl solution, the ions discharged at cathode are:

1. H⁺

2. Na⁺

3. OH^-

4. Cl^-

A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY^- and 1MZ^- at 25$°$C. If the reduction potential of Z > Y > X, then:

1. Y will oxidise X and not Z

2. Y will oxidise Z and not X

3. Y will oxidise both X and Z

4. Y will reduce both X and Z

The solution of CuSO₄ in which copper rod is immersed is diluted to 10 times, the reduction electrode potential:

1. increases by 0.030 V

2. decreases by 0.030 V

3. increases by 0.059 V

4. decreases by 0.059 V

A solution containing one mole per litre each of Cu(NO₃)₂, AgNO₃, Hg₂(NO₃)₂ and Mg(NO₃)₂ is being electrolyzed by using inert electrodes. The values of standard electrode potentials in volt (reduction potentials) are,

Ag⁺ /Ag = 0.80 V, ${\mathrm{Hg}}_2^{2+}$/2Hg = 0.79 V,

Cu²⁺/Cu = +0.34 V and Mg²⁺/Mg = -2.37 V

With increasing voltage, the sequence of deposition of metals on the cathode will be:

1. Ag, Hg, Cu, Mg

2. Mg, Cu, Hg, Ag

3. Ag, Hg, Cu

4. Cu, Hg, Ag

Which of the following aqueous solutions has the highest electrical conductivity?

1. 0.1 M Acetic acid

2. 0.1 M Chloroacetic acid

3. 0.1 M Fluoroacetic acid

4. 0.1 M Difluoroacetic acid

During an electrolysis experiment, if a 100 mA current is passed through a solution of AgNO₃ for 30 minutes, how many coulombs of electricity will be consumed?

1. 108 C

2. 18000 C

3. 180 C

4. 3000 C

Standard reduction potentials at 25$°$C of Li⁺/Li, Ba²⁺/Ba, Na⁺/Na and Mg²⁺/Mg are -3.05, -2.90, -2.71 and -2.37 V respectively. Which one of the following is the strongest oxidising agent ?

1. Mg²⁺

2. Ba²⁺

3. Na⁺

4. Li⁺

Equivalent conductances of NaCl, HCl and C₂H₅COONa at infinite dilution are 126.45, 426.16 and 91 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$. The equivalent conductance of C₂H₅COOH is : 

1. 201.28 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

2. 390.71 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

3. 698.28 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

4. 540.48 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^2$

When an electric current is passed through acidulated water, 112 mL of hydrogen gas at STP collects at the cathode in 965 second. The current passed, in ampere is:

1. 1.0

2. 0.5

3. 0.1

4. 2.0

The electric charge for electrode deposition of 1g equivalent of a substance is:

1. 1 ampere per second

2. 96,500 coulomb per second

3. 1 ampere for 1 hour

4. charge on 1 mole of electrons