Question # 1

Metals which are above SHE in electrochemical series

Choose an answer

Can liberate H₂from acid

Cannot liberate H₂from acid

Cannot always liberate H₂from acid

None of these

The process of electrical coating of one metal on another to protect, decorate or to have greater resistance to corrosion is called

Choose an answer

Electroplating

Electrolysis

Conduction

Induction

Which one of the following reactions is not spontaneous

Choose an answer

In a solution of CuSO₄how much time will be required to precipitate 2g copper by 0.5 ampere current?

Choose an answer

12157.48 sec

102 sec

510 sec

642 sec

A solution of sodium sulphate was electrolysed using some insert electrodes. The products at the electrodes are

Choose an answer

O₂, H₂

O₂, Na

O₂, SO₂

O₂, S₂O₈²

When fused PbBr₂is electrolyzed

Choose an answer

Bromine appears at he cathode

Lead is deposited at the cathode

Lead appears at the anode

None of these happens

The standard EMF of Daniel cell is 1.10 volt. The maximum electrical work obtained from the Daniel cell is

Choose an answer

212.3 kJ

175.4 kJ

106.15 kJ

53.07 kJ

Electrolytes in the form of solution or in the fused state have the ability to conduct :

Choose an answer

Light.

Electricity.

Ions.

Electrons.

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

Choose an answer

0.25 mole

0.5 mole

1.0 mole

2.00 mole

Which of the following will be good conductor of electricity

Choose an answer

Pure distilled water

Molten NaCl

Dilute solution of glucose

Chloroform

In passage of electricity through aqueous solution of AgNO₃silver dissolves at anode to form Ag⁺, the electrodes are

Choose an answer

Silver metal

Pt metal

Graphite

Copper metal

An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108 g more at the end of the electrolysis. The volume of oxygen evolved at STP is

Choose an answer

56 cm³

550 cm³

5.6 cm³

11.2 cm³

By using graphite electrode the electrolysis of aqueous solution of NaCI produces at anode

Choose an answer

H₂gas

Cl₂gas

NaOH

No metal

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.2965 V at 25°C. The equilibrium constant of the reaction would be

Choose an answer

1.0 x 10¹⁰

2.0 x 10¹¹

4.0 x 10¹²

1.0 x 10²

Prevention of corrosion of iron by Zn coating is called

Choose an answer

Galvanization

Cathodic protection

Electrolysis

Photoelectrolysis

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

Choose an answer

Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

Choose an answer

120 C

240 C

20 C

4 C

Purification of an impure copper is made by electrolytic cell, in which impure copper is anode and pure copper is cathode, and the electrolyte used is

Choose an answer

H₂SO₄

CuSO₄

ZnSO₄

Na₂SO₄

Pick out the wrong statement. In electrochemical cell

Choose an answer

Electrons are released at anode

Cathode is regarded as negative electrode

Chemical energy is converted into electrical energy

Salt bridge maintains the electrical neutrality of the solution

When aqueous NaCl is electrolyzed, which of the following ions get discharged at anode :

Choose an answer

H⁺

Na⁺

OH^-

Cl^-

Cell potential depends upon :

Choose an answer

Concentration of ions

Nature of electrolyte

Temperature

All of above

In electrolytic cells, the chemical changes may be :

Choose an answer

Either spontaneous or non-spontaneous

Always spontaneous

Always non-spontaneous

More spontaneous and less non-spontaneous.

Choose an answer

Adding H₂O and H⁺ions

Adding OH^-ions

Adding O²molecules

Adding O atoms

Electrochemical series is a list of element S arranged into the increasing order of their

Choose an answer

Standard oxidation potential

Standard reduction potential

Cell voltage

Ionization potential

Best way to prevent rusting of iron is by

Choose an answer

Making iron cathode

Putting it in saline water

Both of these

None of these

The cell in which a non-spontaneous redox reaction takes place as a result electricity is known as :

Choose an answer

Electrolytic cell.

Voltaic cell.

Daniel cell.

Dry cell.

While balancing an equation by ion electron method, the number of oxygen atoms are balanced by

Choose an answer

OH^-

H₂O

O₂

H⁺

The reference calomel electrode is made from which of the following?

Choose an answer

ZnCl₂

CuSO₄

Hg₂Cl₂

HgCl₂

The two half cells of a galvanic cell are connected by

Choose an answer

Ammeter

Salt bridge

Hydrogen electrode

Copper electrode

K,Ca and Li metals may be arranged in decreasing order of their reduction potential as :

Choose an answer

Li, k, Ca

Ca, K, Li

Li, Ca, K

K, Ca, Li

Choose an answer

Fe is reduced

Fe is oxidized

Cl₂is oxidized

None of these

More Classes

Other Links

ECAT Chemistry Chapter 10 Electrochemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer