NEET Questions - Chemistry - Redox Reactions & Electrochemisty

Pratcice NEET questions from all capters from huge question bank for free. All MCQs are based on NCERT syllabus. To practice from a specific subject and chapter, select a subject below. Login to practice in a structured way with explanations, bookmarks, lists, notes etc. Click here to Login or Sign up for free.

Physics Chemistry Botany Zoology

Question bank:

Calculate the energy obtainable from a lead storage battery in which 0.1 mol lead is consumed. Assume a constant concentration of 10.0 M $H_{2} S O_{4}$

42.8 kJ
12.8 kJ
32.3 kJ
20.2 kJ

Adiponitrile is manufactured electrolytically from acrylonitrile $C H_{2} = C H C N \to C N - (C H_{2})_{4} - C H$

How many kg of adiponitrile (molecular mass = 108) is produced in 9.65 hr using a current of 3750 A with 80% efficiency ?

30 kg
58 kg
60 kg
80 kg

A certain metal salt solutions is electrolysed in series with a silver coulometer. The weights of silver and the metal deposited are 0.5094 g and 0.2653 g. Calculate the valency of the metal if its atomic weight is nearly that of silver.

1
2
3
4

The reduction potential of a half-cell consisting of a Pt electrode immersed in $1.5 M F e^{2 +}$ and $0.015 M F e^{3 +}$ solution at $25 ° C i s (E_{(A g^{+}, A g)}^{°} = + 0.770 v)$ .

0.652 V
0.88 V
0.710 V
0.850 V

In a concentration cell, $Z n / Z n^{2 +} (1.0 M) | | Z n^{2 +} (0.15 M) / Z n$ as the cell discharges,

reaction proceeds to the right
the two solutions approach each other in concentration
no reaction takes place
water gets decomposed

In a half-cell containing $[T l^{3 +}] = 0.1 M a n d [T l^{+}] = 0.01 M,$ the cell potential is – 1.2496 V for the reaction $T l^{+} \to T l^{3 +} + 2 e^{-}$ The standard reduction potential of the $T l^{+} / T l^{3 +}$ couple at $25 ° C$ is

1.44 V
0.61 V
2.44 V
1.22 V

The standard reduction potentials for $M n^{3 +} / M n^{2 +}$ and $M n O_{2} / M n^{3 +}$ couples in acid medium at $25 ° C$ are 1.50 V and 1.00 V respectively. The following reaction:

$2 M n^{3 +} + 2 H_{2} O \to M n^{2 +} + M n O_{2} + 4 H^{+} i s$

reversible
non-spontaneous
spontaneous
irreversible

If a 100 mL solution of 0.1M HBr is titrated using a very concentrated solution of NaOH, then the conductivity (specific conductance) of the solution at the equivalence point will be (assume volume change is negligible due to addition of NaOH). Calculate your answer in terms of $10^{- 1} S m^{- 1},$

$[G i v e n {\land^{°}}_{(N a^{+})} = 8 \times 10^{- 3} S m^{2} m o l^{- 1} {\land^{°}}_{(B r^{-})} = 4 \times 10^{- 3} S m^{2} m o l^{- 1}]$

6
12
15
24

The volume of gases liberated at STP when a charge of 2F is passed through aqueous solution of sodium phosphate, is :

11.2L
44.8L
33.6L
22.4L

It is desired to convert the energy derived from the combustion of propane into electrical energy, via a fuel cell. Given that the standard free energies of formation of $C_{3} H_{8} (g), H_{2} O (l) a n d C O_{2} (g)$ are -23.5, -237.2 and -394.4 $k J m o l^{- 1}$ respectively, calculate the standard EMF of the propane fuel cell.

1.10 V
2.10V
3.12 V
4.12 V

Na-amalgam is prepared by electrolysis of NaCl solution using liquid Hg as cathode. How long should the current of 10 amp. is passed to produce 10% Na – Hg on a cathode of 10 gm Hg. (atomic mass of Na = 23).

7.77 min.
9.44 min.
5.24 min.
11.39 min.

The standard reduction potential of a silver chloride electrode is 0.2 V and that of a silver electrode is 0.79 V. The maximum amount of AgCl that can dissolve in $10^{6} L o f a 0.1 M A g N O_{3}$ solution is

0.5 mmol
1.0 mmol
2.0 mmol
2.5 mmol

The $k = 4.95 \times 10^{- 5} S c m^{- 1}$ for a 0.00099 M solution. Calculate the reciprocal of the degree of dissociation of acetic acid, if $\land_{m}^{0}$ for acetic acid is 400 S $c m^{2} m o l^{- 1}$

7
8
9
10

A hydrogen electrode X was placed in a buffer solution of sodium acetate and acetic acid in the ratio a : b and another hydrogen electrode Y was placed in a buffer solution of sodium acetate and acetic acid in the ratio b : a. If reduction potential values for two cells are found to be $E_{1} a n d E_{2}$ respectively w.r.t standard hydrogen electrode, the $p K_{a}$ value of the acid can be given as

\frac{E_{1} - E_{2}}{0.118}

\frac{E_{1} + E_{2}}{0.118}

\frac{E_{1}}{E_{2}} \times 0.118

\frac{E_{2} - E_{1}}{0.118}

At what $\frac{[B r^{-}]}{\sqrt{[C O_{3}^{2 -}]}}$ does the following cell have its reaction at equilibrium ?

$A g (s) | A g_{2} C O_{3} (s) | N a_{2} C O_{3} (a q) | | K B r (a q) | A g B r (s) | A g (s)$

$K_{S P} = 8 \times 10^{- 12} f o r A g_{2} C O_{3} a n d K_{S P} = 4 \times 10^{- 13} f o r A g B r$

\sqrt{1} \times 10^{- 7}

\sqrt{2} \times 10^{- 7}

\sqrt{3} \times 10^{- 7}

\sqrt{4} \times 10^{- 7}

NEET Chemistry Questions: Redox Reactions & Electrochemisty

Question bank:

Calculate the energy obtainable from a lead storage battery in which 0.1 mol lead is consumed. Assume a constant concentration of 10.0 M H2 SO4

Adiponitrile is manufactured electrolytically from acrylonitrile CH2= CHCN → CN – (CH2 )4 – CH How many kg of adiponitrile (molecular mass = 108) is produced in 9.65 hr using a current of 3750 A with 80% efficiency ?

A certain metal salt solutions is electrolysed in series with a silver coulometer. The weights of silver and the metal deposited are 0.5094 g and 0.2653 g. Calculate the valency of the metal if its atomic weight is nearly that of silver.

The reduction potential of a half-cell consisting of a Pt electrode immersed in 1.5 M Fe2+and 0.015 M Fe3+ solution at 25°C is EAg+, Ag°=+0.770 v.

In a concentration cell, Zn/Zn2+ (1.0 M) || Zn2+ (0.15 M)/Zn as the cell discharges,

In a half-cell containing [Tl3+] = 0.1 M and [Tl+ ] = 0.01 M, the cell potential is – 1.2496 V for the reaction Tl+→ Tl3+ + 2e- The standard reduction potential of the Tl+ /Tl3+ couple at 25°C is

The standard reduction potentials for Mn3+/Mn2+ and MnO2 /Mn3+ couples in acid medium at 25°C are 1.50 V and 1.00 V respectively. The following reaction: 2Mn3+ + 2H2O → Mn2+ + MnO2 + 4H+ is