If the molar conductivity (\(\Lambda_m\)) of a 0.050 mol L^-1 solution of a monobasic weak acid is 90 S cm² mol^-1, its extent (degree) of dissociation will be
[Assume \(\Lambda_+^\circ\, =\, 349.6 \,S\, cm^2\, mol^{-1}\) and \(\Lambda_-^2\, =\, 50.4\, S\, cm^2\, mol^{-1}\)]

(1). 0.215
(2). 0.115
(3). 0.125
(4). 0.225

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is:
(Given: Molar mass of \(\text{Cu:}\, 63\,g\,\text{mol}^{-1}\), \(1\text{F}\, =\, 96487 \text{C}\))

(1). 31.5 g
(2). 0.0315 g
(3). 3.15 g
(4). 0.315 g

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

Match List-I with List-II:

Choose the correct answer from the options given below:

(1). A-II, B-III, C-I, D-IV
(2). A-III, B-IV, C-II, D-I
(3). A-II, B-IV, C-I, D-III
(4). A-III, B-IV, C-I, D-II

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

The conductivity of centimolar solution of KCl at \(25^\circ C\) is 0.0210 ohm^-1 and cm^-1 and the resistance of the cell containing the solution at \(25^\circ C\) is 60 ohm. The value of cell constant is-

(1). 3.28 cm^-1
(2). 1.26 cm^-1
(3). 3.34 cm^-1
(4). 1.35 cm^-1

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

Given below are half cell reactions:

Will the permanganate ion, MnO₄^- liberate O₂ from water in the presence of an acid?

(1). \(\text{Yes, because}\, E^\circ _{cell}\,=\,+0.287\, \text{V}\)
(2). \(\text{No, because}\, E^\circ _{cell}\,=\,-0.287\, \text{V}\)
(3). \(\text{Yes, because} \,E^\circ _{cell}\,=\,+2.733\, \text{V}\)
(4). \(\text{Np, because}\, E^\circ _{cell}\,=\,-2.733\, \text{V}\)

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

At 298 K, the standard electrode potentials of
\(\displaystyle \frac{Cu^{2+}}{Cu}\), \(\displaystyle \frac{Zn^{2+}}{Zn}\), \(\displaystyle \frac{Fe^{2+}}{Fe}\), and \(\displaystyle \frac{Ag^{+}}{Ag}\) are \(0.34\, \text{V}\), \(-0.76\, \text{V}\), \(-0.44\, \text{ V}\) and \(0.80\, \text{V}\), respectively.
On the basis of standard electrode potential, predict which of the following reaction cannot occur?

(1).
(2).
(3).
(4).

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

Find the emf of the cell in which the followingreaction takes place at 298 K


(1). 1.0385 V
(2). 1.385 V
(3). 0.9615 V
(4). 1.05 V

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

The molar conductance of NaCl, HCI and CH₃COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm² mol^-1 respectively. The molar conductance of CH₃COOH at infinite dilution is.
Choose the right option for your answer.

(1). 201.28 S cm² mol^-1
(2). 390.71 S cm² mol^-1
(3). 698.28 S cm² mol^-1
(4). 540.48 S cm² mol^-1

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

The molar conductivity of 0.007 M acetic acid is 20 S cm² mol^-1, What is the dissociation constant of acetic acid ? Choose the correct option.


(1). 1.75 x 10^-4 mol L^-1
(2). 2.50 x 10^-4 mol L^-1
(3). 1.75 x 10^-5 mol L^-1
(4). 2.50 x 10^-5 mol L^-1

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

On electrolysis of dilute suiphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:

(1). Oxygen gas
(2). H₂S gas
(3). SO₂ gas
(4). Hydrogen gas

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

The number of Faradays(F) required to produce 20 g of calcium from molten CaCl₂ (Atomic mass of Ca = 40 g mol^-1) is:

(1). 2
(2). 3
(3). 4
(4). 1

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

For a cell involving one electron \(\text{E}^\circ _\text{cell}\) = 0.59 V at 298 K, the equilibrium constant for the cell reaction is
[Given that \(\displaystyle \frac{2.303 RT}{F}\) = 0.059 V at T = 298 K]

(1). 1.0 x 10⁵
(2). 1.0 x 10¹⁰
(3). 1.0 x 10³⁰
(4). 1.0 x 10²

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

For the cell reaction
2Fe³⁺(aq) + 2I^–(aq) \(\rightarrow\) 2Fe²⁺(aq) + I₂ (aq)
\(\text{E} ^\oplus_\text{cell}\) = 0.24 V at 298 K. The standard Gibbs energy cell (\(\Delta_r \text{G}^\ominus\)) of the cell reaction is
[Given that Faraday constant F = 96500 C mol^–1]

(1). – 23.16 kJ mol^–1
(2). 46.32 kJ mol^–1
(3). 23.16 kJ mol^–1
(4). – 46.32 kJ mol^–1

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

Extraction of gold and silver involves leaching with CN^- ion. Silver is later recovered by

(1). Displacement with Zn
(2). Liquation
(3). Distillation
(4). Zone refining

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?

(1). Li
(2). Na
(3). K
(4). Rb

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

In the electrochemical cell
Zn|ZnSO₄ (0.01M)| |CuSO₄(1.0 M)|Cu, the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0 M and that of CuSO₄ changed to 0.01 M, the emf changes to E₂. From the following, which one is relationship between E₁ and E₂
(Given, \(\frac{\text{RT}}{\text{F}}\) = 0.059)

(1). E₂ = 0 \(\neq\) E₁
(2). E₁ = E₂
(3). E₁ < E₂
(4). E₁ > E₂

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05

The pressure ofH₂ required to make the potential of H<sub><2/sub> - electrode zero in pure water at 298 K is

(1). 10^-12 atm
(2). 10^-10 atm
(3). 10^-4 atm
(4). 10^-14 atm</sub>

Number of Attempts: 03

Correct Attempts: 01

Time Taken: 00:15

Average Time: 00:05