Question # 1

The equivalent conductivity of 0.1 M week acid is 100 times less than at infinite dilution. The degree of dissociation is

Choose an answer

100

10

0.01

0.001

The difference of potential of two electrodes when concentration of solution is 1M each at 25°C and1 atm is called :

Choose an answer

Cell reaction.

Electrode potential.

Cell voltage.

Standard cell potential.

Zn does not displace Mg from MgSO₄solution because

Choose an answer

Zn is more electropositive than Mg

Zn is below Mg in electropositive series

Zn is above Mg in electrochemical series

Zn is trivalent Mg is divalent

The galvanic or voltaic cells which are rechargeable called as

Choose an answer

Primary cells

Secondary cells

Dry cells

Infinite cells

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

What are the products electrolysis of aqueous sodium chloride at two electrodes

Choose an answer

Chlorine at anode and oxygen at cathode.

Hydrogen at anode and chlorine at cathode.

Chlorine at anode and hydrogen at cathode.

Chlorine at anode and sodium at cathode.

Reaction takes place at anode is

Choose an answer

Ionization

Reduction

Oxidation

Hydrolysis

Electrolysis is used for :

Choose an answer

Manufacture of caustic soda

Refining of copper

Electroplating

All of above

Corrosion reaction are

Choose an answer

Spontaneous redox reaction

Non-spontaneous acid-base reactions

Spontaneous acid-base reactions

None of these

The specific conductance of a 0.1 N KCl solution at 23°C is 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

Choose an answer

0.142 cm^-1

0.66 cm^-1

0.916 cm^-1

1.12 cm^-1

For spontaneity of a cell, which is correct?

Choose an answer

ΔG = 0,ΔE = 0

ΔG = -ve ,ΔE = 0

ΔG = +ve ,ΔE = 0

ΔG = -ve

In the electrolysis of fused bauxite (Al₂O₃2H₂O) with fused Cryolite (Na₃AlF₆) using carbon rods as anode. The product obtained at cathode is

Choose an answer

Na metal

F₂gas

Al metal

O₂gas

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

The unit of specific conductivity is

Choose an answer

Ohm cm^-1

Ohm cm^-2

Ohm^-1cm

Ohm^-1cm^-1

Electrochemistry is concerned with the conversion of electrical energy into chemical energy in :

Choose an answer

Galvanic cell

Electrolytic cell

Voltaic cell

Both (a) and (c)

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

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

Choose an answer

H₂gas

Cl₂gas

NaOH

No metal

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

The two half cells of a galvanic cell are connected by

Choose an answer

Ammeter

Salt bridge

Hydrogen electrode

Copper electrode

Choose an answer

Cu

H

N

O

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because

Choose an answer

These have very high positive values of reduction potentials

These have very high negative values of reduction potentials

Their ionization potentials are lowest

Their reduction potentials are close to SHE

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 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.

Metallic conduction is due to the

Choose an answer

Movement of electrons

Movement of ions

Both a and b

None of these

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

Choose an answer

One pascal

One kilo pascal

One atmoshpere

Then atmoshpere

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

Choose an answer

1.08 g

2.16 g

0.54 g

0.27 g

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

Choose an answer

Light.

Electricity.

Ions.

Electrons.

In a Galvanic cell, the electrons flow from

Choose an answer

A node to cathode through the solution

Cathode to anode through the external circuit

Anode to cathode through the external circuit

Choose an answer

Adding H₂O and H⁺ions

Adding OH^-ions

Adding O²molecules

Adding O atoms

The reference electrode is made by using

Choose an answer

ZnCl₂

CuSO₄

HgCl₂

Hg₂Cl₂

A cell in which spontaneous redox reaction generates an electric current is called

Choose an answer

Electrolytic cell

Electrochemical cell

Voltaic or Galvanic cell

Biological cell

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