General Knowledge - Chemistry

Exercise :: Chemistry - Section 1

  • Chemistry - Section 1
73. 

The maximum number of covalent formed by nitrogen is

A. 1
B. 2
C. 3
D. 4

Answer: Option D

Explanation:

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74. 

The formula C6H5-CO-CH3 represents

A. Acetone
B. Acetic acid
C. Acetophenone
D. Phenyl acetate

Answer: Option C

Explanation:

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75. 

The metal that is usually extracted from sea water is

A. Ca
B. Na
C. K
D. Mg

Answer: Option D

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76. 

The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

A. liquation
B. leaching
C. levigation
D. magnetic separation

Answer: Option C

Explanation:

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77. 

The inert gases are ____ in water

A. sparingly soluble
B. insoluble
C. soluble
D. None of these

Answer: Option A

Explanation:

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78. 

The molecular formula of phosphorous is

A. P1
B. P2
C. P3
D. P4

Answer: Option D

Explanation:

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