Punjab 9th Class Chemistry Chapter 4 Structure of Molecules Punjab 9th Class

 

Question 1 of 9

Chemistry

1. Phosphorus belongs to third period of Group VA. How many electrons it needs to complete its valence shell.

5

4

2

3

Question 1 of 9

Question 2 of 9

2. Which of the following is not true about the formation of Na₂S:

Each sodium atom loses one electron

Sulphur forms anion

Sodium forms cation

Each sulphur atom gains one electron

Question 2 of 9

Question 3 of 9

3. Silicon belongs to Group IVA. It has ___________ electrons in the valence shell

2

3

6

4

Question 3 of 9

Question 4 of 9

4. Which of the following atoms obey duplet rule?

F₂

H₂

N₂

O₂

Question 4 of 9

Question 5 of 9

5. In the formation of AIF₃, aluminum atom loses ___________ electrons.

3

1

4

2

Question 5 of 9

Question 6 of 9

6. Which of the following atoms will form an ion of charge -2?

Atomic Number/8 Mass Number/8

Atomic Number/14 Mass Number/28

Atomic Number/12 Mass Number/24

Atomic Number/10 Mass Number/20

Question 6 of 9

Question 7 of 9

7. Which of the following atoms will form cation.

Atomic Number/18

Atomic Number/20

Atomic Number/17

Atomic Number/15

Question 7 of 9

Question 8 of 9

8. Identify the covalent compound

KF

NaCl

H₂O

MgO

Question 8 of 9

Question 9 of 9

9. Which of the following atoms will not form cation or anion.

D (Atomic No. 19)

C (Atomic No. 18)

B (Atomic No. 17)

A (Atomic No. 16)

Question 9 of 9

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