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. The brown gas formed, when metal reduces HNO3 to

1.N2O

2.NO2

3.N2O5

4.NO

Question 1 of 20

Question 2 of 20

2. The lowest ionization energy is possessed by:

1.Bi

2.N

3.Sb

4.P

Question 2 of 20

Question 3 of 20

3. Oxidation of NO in air produces

1.N₂O₅

2.N₂0₄

3.N₂0₃

4.N₂O

Question 3 of 20

Question 4 of 20

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

1.SO3 is insoluble in water

2.The reaction is highly exothermic

3.The reaction does not go to complete

4.The reaction is quite slow

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.Moderately reactive gas

2.Highly reactive gas

3.Very less reactive gas

4.Completely inert like noble gases

Question 5 of 20

Question 6 of 20

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

1.N₂O

2.N₂O₅

3.NO

4.NO₂

Question 6 of 20

Question 7 of 20

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

1.

N₂O

2.NO2

3.NO

4.None

Question 7 of 20

Question 8 of 20

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

1.As

2.N

3.P

4.Sb 

Question 8 of 20

Question 9 of 20

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

1.Sb

2.Bi

3.N

4.P

Question 9 of 20

Question 10 of 20

10. NO2 is called

1.Nitrite oxide

2.Nitric anhydride

3.Nitrous oxide

4.Nitrogen peroxide

Question 10 of 20

Question 11 of 20

11. The compound N20 causes disease:

1.Tumor

2.Sleeping Sickness

3.Cancer

4.Hysterical Laughter

Question 11 of 20

Question 12 of 20

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

1.O2

2.O₂+

3.O₂^2-

4.O₂^-

Question 12 of 20

Question 13 of 20

13. Laughing gas is:

1.N₂O₂

2.NO₃

3.NO

4.N₂O

Question 13 of 20

Question 14 of 20

14. The most electronegative element in group-VA is

1.N

2.P

3.Sb

4.As

Question 14 of 20

Question 15 of 20

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

1.nitrogen is highly inactive

2.nitrogen requires a catalyst

3.oxygen is found in less conc.

4.oxygen is very inactive

Question 15 of 20

Question 16 of 20

16. Gold dissolves in aqua regain to form.

1.AuCl₃

2.Au₂(SO₄)₃

3.Aul₃

4.Aul₂

Question 16 of 20

Question 17 of 20

17. Laughing gas is chemically

1.N₂O

2.NO

3.N₂O₄

4.NO₂

Question 17 of 20

Question 18 of 20

18. Chemical formula of laughing gas is

1.N₂O₄

2.N₂O₃

3.NO

4.N₂O

Question 18 of 20

Question 19 of 20

19. Which catalyst is used in contact process

1.Ag₂O

2.Fe₂O₃

3.V₂O₅

4.SO3

Question 19 of 20

Question 20 of 20

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

1.S

2.Te

3.Se

4.Po

Question 20 of 20

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