Corrosion : Chemistry MCQ Practice Questions & Answers (English)

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1.

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

A

Ni

B

Cu

C

Pb

D

Fe

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2.

Which of the following gases accelerates rusting of iron?

A

$CO_2$

B

$SO_2$

C

$NO_2$

D

All of above

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3.

Which of following metals could provide cathodic protection to Fe?

A

Al & Cu

B

Al & Zn

C

Zn & Cu

D

Al & Ni

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4.

Volatile oxidation corrosion product of a metal is

A

$Fe_2O_3$

B

$MoO_3$

C

$Fe_3O_4$

D

FeO

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5.

Standard electrode potential of Zn2+/ Zn is

A

0.76 V

B

0.76 V

C

2.76 V

D

2.76 V

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6.

Standard electrode potential of hydrogen is

A

1.00 V

B

0.00 V

C

0.01 V

D

0.001 V

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7.

Standard electrode potential of Fe2+/Fe is

A

0.44 V

B

0.44 V

C

1.44 V

D

1.44 V

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8.

Standard electrode potential of Al / Al3+ is

A

0.66V

B

0.66 V

C

1.66 V

D

1.66 V

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9.

Smaller the grain size, corrosion is

A

Greater

B

Lower

C

Constant

D

Doesnt affected

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10.

Process of corrosion enhanced by

A

AIR & Moisture

B

Electrolytes in water

C

Metallic impurities

D

All of above

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11.

Lower is PH, corrosion is

A

Greater

B

Lower

C

Constant

D

None of above

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12.

Electrochemical corrosion takes place on

A

Anodic area

B

Cathodic area

C

Near cathode

D

Near anode

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13.

Chemical formula of Rust is

A

$Fe_2O_3$

B

FeO

C

$Fe_3O_4$

D

$Fe_2O_3$ .XH2O

Corrosion in Chemistry : Practice MCQ Questions & Answers with Explanations