Chemistry MCQ: Practice Questions & Answers (Tamil) - Page 29

ChemistryEasyElectrolysis

561.

During electrolysis of NaCI, the gas discharged at the anode is

A

Chlorine

B

Hydrogen

C

Oxygen

D

None of these

ChemistryEasyElectrolysis

562.

An electrolyte is a

A

metal

B

sugar

C

cell

D

liquid that conducts electricity

ChemistryEasyElectrolysis

563.

A weak electrolyte is one which

A

dissociates completely

B

is feebly ionised in the solution

C

ionises completely

D

is having high electrical conductivity

ChemistryEasyCorrosion

564.

Which of the following metal does not resists the corrosion process?

A

Ni

B

Cu

C

Pb

D

Fe

ChemistryEasyCorrosion

565.

Which of the following gases accelerates rusting of iron?

A

$CO_2$

B

$SO_2$

C

$NO_2$

D

All of above

ChemistryEasyCorrosion

566.

Which of following metals could provide cathodic protection to Fe?

A

Al & Cu

B

Al & Zn

C

Zn & Cu

D

Al & Ni

ChemistryEasyCorrosion

567.

Volatile oxidation corrosion product of a metal is

A

$Fe_2O_3$

B

$MoO_3$

C

$Fe_3O_4$

D

FeO

ChemistryEasyCorrosion

568.

Standard electrode potential of Zn2+/ Zn is

A

0.76 V

B

0.76 V

C

2.76 V

D

2.76 V

ChemistryEasyCorrosion

569.

Standard electrode potential of hydrogen is

A

1.00 V

B

0.00 V

C

0.01 V

D

0.001 V

ChemistryEasyCorrosion

570.

Standard electrode potential of Fe2+/Fe is

A

0.44 V

B

0.44 V

C

1.44 V

D

1.44 V

ChemistryEasyCorrosion

571.

Standard electrode potential of Al / Al3+ is

A

0.66V

B

0.66 V

C

1.66 V

D

1.66 V

ChemistryEasyCorrosion

572.

Smaller the grain size, corrosion is

A

Greater

B

Lower

C

Constant

D

Doesnt affected

ChemistryEasyCorrosion

573.

Process of corrosion enhanced by

A

AIR & Moisture

B

Electrolytes in water

C

Metallic impurities

D

All of above

ChemistryEasyCorrosion

574.

Lower is PH, corrosion is

A

Greater

B

Lower

C

Constant

D

None of above

ChemistryEasyCorrosion

575.

Electrochemical corrosion takes place on

A

Anodic area

B

Cathodic area

C

Near cathode

D

Near anode

ChemistryEasyCorrosion

576.

Chemical formula of Rust is

A

$Fe_2O_3$

B

FeO

C

$Fe_3O_4$

D

$Fe_2O_3$ .XH2O

ChemistryEasyAir Pollution

577.

Which one of the following is an example of physical pollutant

A

Air

B

Radiation

C

Water

D

Plant

ChemistryEasyAir Pollution

578.

Which of the following is NOT one of the criteria air pollutants monitored by the U.S.-EPA?

A

Mercury

B

Carbon monoxide

C

Ozone

D

Sulfur dioxide

ChemistryEasyAir Pollution

579.

Which of the following is not a source of air pollution?

A

burning of firewood

B

Wind Mill

C

automobile exhaust

D

power plant

ChemistryEasyAir Pollution

580.

Which of the following is not a greenhouse gas

A

nitrogen

B

water vapour

C

methane gas

D

carbon dioxide

Chemistry : Practice Questions and Answers

Chemistry : Practice Questions and Answers