Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 39

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The mass of copper deposited by the passage of $2 A$ of current for $965 s$ , through a $2 M$ solution of ${CuSO}_{4}$ (Atomic mass of $Cu=63.5$ ) is

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Important Questions on Electrochemistry

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 40

When a current of

3 A

is passed through an aqueous solution of a palladium salt, the mass of the

Pd

metal deposited in

1

hour is

2.98 g

. If the metal’s atomic mass is

106.4

, the valency of palladium is______.

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 41

What will be the current required to deposit on the cathode

39.4 g gold / hour

from a solution containing a salt of gold

(III) ?

(At. mass of gold =197 g {mol}^{-1})

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 42

How many hours are required for a current of

3 A

to decompose electrically, one mole of water?

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 43

When electricity is passed through the

H_{2} {SO}_{4} and {CaCl}_{2}

solution, the ratio of the mass of hydrogen and calcium liberated will be ______. (Atomic mass of Ca

= 40

)

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 44

Two electrolytic cells, one containing acidified ferrous sulphate, and the other containing acidified ferric sulphate are connected in series. The ratio of the iron deposited at the cathodes in the two cells will be_______, respectively.

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 45

An industry produced

40 kg

of calcium in two hours by electrolysis. How much aluminium will be produced by the same current in two hours? (Atomic mass:

Ca =40, Al =27

)

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 46

A solution of a trivalent metal ion is electrolysed by a current of

5 A

for

10 minutes

, during this time,

1.18 g

of metal was plated out. The identity of the metal is _____.

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 47

A depolarizer used in dry cell batteries is