Punjab 12th Class Chemistry Chapter 4 Group V-A and Group VI-A Elements MCQs Test Online

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Question 1 of 20

Chemistry

1. Which of the following specie has the maximum number of unpaired electrons

1.O2

2.O₂^2-

3.O₂^-

4.O₂+

Question 1 of 20

Question 2 of 20

2. Which catalyst is used in contact process

1.Ag₂O

2.Fe₂O₃

3.SO3

4.V₂O₅

Question 2 of 20

Question 3 of 20

3. Among group VA elements, the most electronegative element is

1.As

2.Sb 

3.P

4.N

Question 3 of 20

Question 4 of 20

4. Out of all the elements of group VIA, the highest melting and boiling points is shown by the elements

1.S

2.Te

3.Po

4.Se

Question 4 of 20

Question 5 of 20

5. In comparison with oxygen gas. a strong triple bond is present between two nitrogen atoms in a molecule and therefore nitrogen gas is:

1.Highly reactive gas

2.Moderately reactive gas

3.Completely inert like noble gases

4.Very less reactive gas

Question 5 of 20

Question 6 of 20

6. The compound N20 causes disease:

1.Sleeping Sickness

2.Hysterical Laughter

3.Tumor

4.Cancer

Question 6 of 20

Question 7 of 20

7. The most electronegative element in group-VA is

1.As

2.P

3.Sb

4.N

Question 7 of 20

Question 8 of 20

8. Free nitrogen and oxygen are present in atmosphere but they do not react with each other under normal conditions because

1.oxygen is very inactive

2.nitrogen requires a catalyst

3.oxygen is found in less conc.

4.nitrogen is highly inactive

Question 8 of 20

Question 9 of 20

9. Which of the following is a reddish brown gas:

1.NO

2.NO₂

3.N₂O

4.N₂O₅

Question 9 of 20

Question 10 of 20

10. Laughing gas is chemically

1.NO₂

2.NO

3.N₂O₄

4.N₂O

Question 10 of 20

Question 11 of 20

11. SO3 is not absorbed in water directly to from H2SO4 because

1.SO3 is insoluble in water

2.The reaction does not go to complete

3.The reaction is highly exothermic

4.The reaction is quite slow

Question 11 of 20

Question 12 of 20

12. The brown gas formed, when metal reduces HNO3 to

1.N2O

2.NO2

3.NO

4.N2O5

Question 12 of 20

Question 13 of 20

13. NO2 is called

1.Nitrogen peroxide

2.Nitric anhydride

3.Nitrous oxide

4.Nitrite oxide

Question 13 of 20

Question 14 of 20

14. Out of all the elements of group VA, the highest ionization energy is possessed by

1.N

2.Sb

3.P

4.Bi

Question 14 of 20

Question 15 of 20

15. Which of the following gas is evolved when cooper reacts with dil HNO3?

1.NO2

2.

N₂O

3.NO

4.None

Question 15 of 20

Question 16 of 20

16. Laughing gas is:

1.N₂O

2.NO₃

3.NO

4.N₂O₂

Question 16 of 20

Question 17 of 20

17. The lowest ionization energy is possessed by:

1.Sb

2.N

3.Bi

4.P

Question 17 of 20

Question 18 of 20

18. Gold dissolves in aqua regain to form.

1.Aul₃

2.Au₂(SO₄)₃

3.AuCl₃

4.Aul₂

Question 18 of 20

Question 19 of 20

19. Chemical formula of laughing gas is

1.N₂O₃

2.NO

3.N₂O

4.N₂O₄

Question 19 of 20

Question 20 of 20

20. Oxidation of NO in air produces

1.N₂O₅

2.N₂O

3.N₂0₄

4.N₂0₃

Question 20 of 20

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