Question

CHEMISTRY.
Question 4

Twice the vapour density gives:

1. Actual vapour density

2. Relative vapour density

3. Molecular mass

4. Molar volume

[1]

Question 5

The number of lone pair of electrons in the nitrogen atom in ammonia molecule:

1. One

2. Two

3. Three

4. Four

[1]

Question 6

Elements with similar valence shell configuration in a Periodic Table are placed in:

1. different groups

2. same period

3. different period

4. same group

[1]

Question 7

The gas liberated when sodium sulphite reacts with dilute sulphuric acid:

1. Carbon dioxide

2. Hydrogen

3. Hydrogen sulphide

4. Sulphur dioxide

[1]

Question 8

Thickness of metal coating during electroplating depends on:

1. Duration of current passage

2. A low current

3. Nature of cathode

4. Purity of anode​​

Answer 1

Answer:

4)2

5)1

6)4

7)3

8)2

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Answer 2

vapour density is equal to mass of n moleculs of gass/mass of n moleculs of hydrogen