Practice MCQ Questions and answers on Chemistry-GK Page-1 section-12

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12

1.
Bleaching action of moist sulphur dioxide is because of its

A. Basic property

B. Acidic property

C. Oxidising property

D. Reducing property

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2.
Sulphur dioxide bleaches colouring matter by :

A. Reduction

B. Dehydration

C. Decomposition

D. Oxidation

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3.
Which one of the following is commonly used for pulp bleaching in the paper industry?

A. Mild sulphuric acid

B. Glucose isomerase

C. Hydrogen peroxide

D. Iodine and water

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4.
In upper layer of atmosphere ozone is formed by

A. The action of ultraviolet rays on oxygen

B. The combination of oxygen molecules

C. Subjecting oxygen to high pressure

D. The action of nitrogen on oxygen in atmosphere

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5.
Which one of the following is used to restore the colour of old oil paintings ?

A. Ozone

B. Hydrogen peroxide

C. Barium peroxide

D. Sodium peroxide

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6.
Ozone consists of

A. Oxygen only

B. Oxygen and Nitrogen

C. Hydrogen and Carbon

D. Oxygen and Carbon

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7.
Ozone layer is present in

A. Troposphere

B. Ionosphere

C. Stratosphere

D. Exosphere

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8.
The presence of ozone in the stratosphere is responsible for

A. Increasing the average global temperature in recent years

B. Higher rate of photosynthesis

C. Checking the penetration of ultraviolet rays to the earth

D. Supplying oxygen for people travelling in jets

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9.
The major use of sulphur is in the manufacture of

A. H₂SO₄

B. H₂S

C. SO₂

D. Fungicide

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10.
Percentage of lead in lead pencils is

A. 0

B. 31-66

C. 40

D. 80

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Practice MCQ Questions and answers on Chemistry-GK

1. Bleaching action of moist sulphur dioxide is because of its

Answer & Solution

2. Sulphur dioxide bleaches colouring matter by :

Answer & Solution

3. Which one of the following is commonly used for pulp bleaching in the paper industry?

Answer & Solution

4. In upper layer of atmosphere ozone is formed by

Answer & Solution

5. Which one of the following is used to restore the colour of old oil paintings ?

Answer & Solution

6. Ozone consists of

Answer & Solution

7. Ozone layer is present in

Answer & Solution

8. The presence of ozone in the stratosphere is responsible for

Answer & Solution

9. The major use of sulphur is in the manufacture of

Answer & Solution

10. Percentage of lead in lead pencils is

Answer & Solution

Read More Section(Chemistry)

1.
Bleaching action of moist sulphur dioxide is because of its

2.
Sulphur dioxide bleaches colouring matter by :

3.
Which one of the following is commonly used for pulp bleaching in the paper industry?

4.
In upper layer of atmosphere ozone is formed by

5.
Which one of the following is used to restore the colour of old oil paintings ?

6.
Ozone consists of

7.
Ozone layer is present in

8.
The presence of ozone in the stratosphere is responsible for

9.
The major use of sulphur is in the manufacture of

10.
Percentage of lead in lead pencils is