HARD

JEE Main

IMPORTANT

Earn 100

$108 g$ of silver (molar mass $108 g {m o l}^{- 1}$ ) is deposited at cathode from ${A g N O}_{3} (a q)$ solution by a certain quantity of electricity. The volume (in $L$ ) of oxygen gas produced at $273 K$ and $1$ bar pressure from water by the same quantity of electricity is $\frac{x}{10}$ . Value of $' x'$ to the nearest integer is _____.

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Important Questions on Electrochemistry

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th January 2019 Shift 2>Q 7

If the standard electrode potential for a cell is

2 V

300 K,

the equilibrium constant

(K)

for the reaction.

Zn (s) + {Cu}^{2 +} (aq) ⇌ {Zn}^{2 +} (aq) + Cu (s)

300 K

is approximately:

(R = 8 {JK}^{- 1} {mol}^{- 1}, F = 96000 C {mol}^{- 1})

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th January 2019 Shift 1>Q 8

The anodic half-cell of lead-acid battery is recharged using electricity of

0 .05

Faraday. The amount of

{PbSO}_{4}

electrolyzed in

g

during the process is: (Molar mass of

{PbSO}_{4} = 303 g {mol}^{- 1}

)

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th April 2019 Shift 2>Q 9

A solution of

N i {(N O_{3})}_{2}

is electrolyzed between platinum electrode

0.1

Faraday electricity. How many mole of

N i

will be deposited at the cathode?

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th April 2019 Shift 1>Q 10

The standard Gibbs energy for the given cell reaction in

k J m o l^{- 1}

298 K

is:

Z n (s) + C u^{2 +} (a q) ⟶ Z n^{2 +} (a q) + C u (s)

E^{0} = 2 V a t 298 K

(F a r a d a y' s c o n s t a n t, F = 96000 C m o l^{- 1})

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th April 2017>Q 11

Which of the following ions does not liberate hydrogen gas on reaction with dilute acids?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th April 2017>Q 12

To find the standard potential of

M^{3 +} / M

electrode, the following cell is constituted:

Pt / M / M^{3 +} (0 .001 mol L^{- 1}) / {Ag}^{+} (0 .01 mol L^{- 1}) / Ag

The emf of the cell is found to be

0.421 volt

298 K

. The standard potential of half-reaction

M^{3 +} + 3 e^{-} \to M

298 K

will be:

(Given:

E_{\frac{{Ag}^{+}}{Ag}}^{⊝}

298 K = 0.80 volt

)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th April 2014>Q 13

A current of $10.0 A$ flows for $2.00 h$ through an electrolytic cell containing a molten salt of metal $X$ . This results in the decomposition of $0.250 mol$ of metal $X$ at the cathode. The oxidation state of $X$ in the molten salt is:

$(F = 96, 500 C)$

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 9 - Electrochemistry>JEE Main - 9th April 2014>Q 14

The standard electrode potentials

(E_{M^{+} / M}^{o})

of four metals

A, B, C

and

D

are

- 1 .2 V,

0 .6 V

0 .85 V

and

- 0 .76 V

, respectively. The sequence of deposition of metals on applying potential is

108 g of silver (molar mass 108 gmol-1) is deposited at cathode from AgNO3aq solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is x10. Value of 'x' to the nearest integer is _____.

Important Questions on Electrochemistry

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