Question # 1

The number of coulombs required for the deposition of 107.870 g of silver is

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96500

48250

193000

10000

A standard hydrogen electrode (S.H.E) consists of a platinized platinum electrode dipped in 1 molar solution of H⁺ions and hydrogen gas is passed at a pressure of

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One pascal

One kilo pascal

One atmoshpere

Then atmoshpere

Out of Cu, Ag, Fe and Zn the metal which can displace all others from theri salt solution is

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Ag

Cu

Zn

Fe

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

In lead accumulator the electrolyte is H₂SO₄solution is

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30% H₂SO₄

60% H₂SO₄

80% H₂SO₄

90% H₂SO₄

When electric current is used to carry out non-spontaneous redox, the process is called

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Hydrolysis

Electrolysis

Decomposition

Neutralization

Which of the following (1 M) conducts more electricity?

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Sulphuric acid

Boric acid

Nitric acid

Phosphorus acid

The conversion of chemical energy into electrical energy requires :

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Electrolytic cell

Galvanic cell

Voltaic cell

Both (b) and (c)

What will be the weight of deposited silver on passing 965 coulombs of electricity in solution of AgNO₃?

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1.08 g

2.16 g

0.54 g

0.27 g

When fused PbBr₂is electrolyzed

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Bromine appears at he cathode

Lead is deposited at the cathode

Lead appears at the anode

None of these happens

The cathodic reaction in the electrolysis of dill H₂SO₄with Pt electrodes

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Reduction

Oxidation

Both oxidation and reduction

neither oxidation or reduction

Which of the following statement is incorrect about SHE(Standard hydrogen electrode):

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Reduction potential of Cu⁺² is smaller than H⁺ions whenit is coupled with copper electrode.

gas is passed in it at 1 atm pressure.

Its oxidation potential and reduction potential is zero.

It is made of platinum wire dipped in HCl solution

In electrolytic cells, the chemical changes may be :

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Either spontaneous or non-spontaneous

Always spontaneous

Always non-spontaneous

More spontaneous and less non-spontaneous.

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