Practice MCQ Questions and answers on Chemistry-GK Page-1 section-7

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.
What is the mass percentage of oxygen in carbon dioxide (CO₂)?

A. 30.5%

B. 50.9 %

C. 65.8 %

D. 72.7 %

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2.
Number of 6.023 × 10²³ atoms present in one mole of a gas at STP is

A. 6.023 × 10²⁰

B. 6.023 × 10²³

C. 6.023 × 10^–20

D. 6.023 × 10^–23

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3.
The percentage of nitrogen present in ammonium sulphate is :

A. 27%

B. 25%

C. 30.5%

D. 18%

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4.
The value of Avogadro Number is

A. 6.023 × 10²²

B. 6.023 × 10²³

C. 6.023 × 1024

D. 6.023 × 10²⁵

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5.
Aqua regia is a 1 : 3 mixture, by volume, of

A. Conc. nitric acid and conc. hydrochloric acid

B. Conc. hydrochloric acid and conc. nitric acid

C. Conc. nitric acid and conc. sulphuric acid

D. Conc. sulphuric acid and conc. nitric acid

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6.
Gold dissolves in

A. Hydrochloric acid

B. Nitric acid

C. Aqua regia

D. Acetic acid

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7.
Nitric acid does not react with

A. Gold

B. Copper

C. Zinc

D. Iron

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8.
Nitrogen in water is commonly found in the form of

A. Nitrous oxide

B. Nitrate

C. Nitric oxide

D. Nitrite

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9.
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

A. Conc. HNO₃and conc. HCl

B. Conc. HNO₃ and conc. H₂SO4

C. Dil. HCl and dil. HNO₃

D. Conc. HCl and conc. HNO₃

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10.
One of the following is used to dissolve noble metals. That is

A. Nitric acid

B. Hydrochloric acid

C. Sulphuric acid

D. Aqua regia

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Practice MCQ Questions and answers on Chemistry-GK

1. What is the mass percentage of oxygen in carbon dioxide (CO2)?

Answer & Solution

2. Number of 6.023 × 1023 atoms present in one mole of a gas at STP is

Answer & Solution

3. The percentage of nitrogen present in ammonium sulphate is :

Answer & Solution

4. The value of Avogadro Number is

Answer & Solution

5. Aqua regia is a 1 : 3 mixture, by volume, of

Answer & Solution

6. Gold dissolves in

Answer & Solution

7. Nitric acid does not react with

Answer & Solution

8. Nitrogen in water is commonly found in the form of

Answer & Solution

9. Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Answer & Solution

10. One of the following is used to dissolve noble metals. That is

Answer & Solution

Read More Section(Chemistry)

1.
What is the mass percentage of oxygen in carbon dioxide (CO₂)?

2.
Number of 6.023 × 10²³ atoms present in one mole of a gas at STP is

3.
The percentage of nitrogen present in ammonium sulphate is :

4.
The value of Avogadro Number is

5.
Aqua regia is a 1 : 3 mixture, by volume, of

6.
Gold dissolves in

7.
Nitric acid does not react with

8.
Nitrogen in water is commonly found in the form of

9.
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

10.
One of the following is used to dissolve noble metals. That is