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

1.Se

2.Te

3.S

4.Po

Question 1 of 20

Question 2 of 20

2. NO2 is called

1.Nitric anhydride

2.Nitrous oxide

3.Nitrogen peroxide

4.Nitrite oxide

Question 2 of 20

Question 3 of 20

3. Chemical formula of laughing gas is

1.N₂O₄

2.N₂O₃

3.NO

4.N₂O

Question 3 of 20

Question 4 of 20

4. 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.Very less reactive gas

4.Completely inert like noble gases

Question 4 of 20

Question 5 of 20

5. The most electronegative element in group-VA is

1.Sb

2.N

3.As

4.P

Question 5 of 20

Question 6 of 20

6. Laughing gas is chemically

1.N₂O₄

2.NO

3.NO₂

4.N₂O

Question 6 of 20

Question 7 of 20

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

1.nitrogen requires a catalyst

2.oxygen is very inactive

3.oxygen is found in less conc.

4.nitrogen is highly inactive

Question 7 of 20

Question 8 of 20

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

1.O2

2.O₂^2-

3.O₂+

4.O₂^-

Question 8 of 20

Question 9 of 20

9. Oxidation of NO in air produces

1.N₂0₄

2.N₂0₃

3.N₂O

4.N₂O₅

Question 9 of 20

Question 10 of 20

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

1.NO2

2.N2O5

3.NO

4.N2O

Question 10 of 20

Question 11 of 20

11. Laughing gas is:

1.N₂O

2.N₂O₂

3.NO₃

4.NO

Question 11 of 20

Question 12 of 20

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

1.Sb 

2.P

3.N

4.As

Question 12 of 20

Question 13 of 20

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

1.NO₂

2.N₂O

3.N₂O₅

4.NO

Question 13 of 20

Question 14 of 20

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

1.NO2

2.

N₂O

3.NO

4.None

Question 14 of 20

Question 15 of 20

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

1.The reaction is quite slow

2.The reaction is highly exothermic

3.SO3 is insoluble in water

4.The reaction does not go to complete

Question 15 of 20

Question 16 of 20

16. Which catalyst is used in contact process

1.V₂O₅

2.Fe₂O₃

3.SO3

4.Ag₂O

Question 16 of 20

Question 17 of 20

17. Gold dissolves in aqua regain to form.

1.Aul₂

2.AuCl₃

3.Aul₃

4.Au₂(SO₄)₃

Question 17 of 20

Question 18 of 20

18. The lowest ionization energy is possessed by:

1.Bi

2.Sb

3.N

4.P

Question 18 of 20

Question 19 of 20

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

1.N

2.P

3.Sb

4.Bi

Question 19 of 20

Question 20 of 20

20. The compound N20 causes disease:

1.Cancer

2.Tumor

3.Hysterical Laughter

4.Sleeping Sickness

Question 20 of 20

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