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. Laughing gas is chemically

1.NO

2.N₂O₄

3.N₂O

4.NO₂

Question 1 of 20

Question 2 of 20

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

1.N

2.P

3.Sb 

4.As

Question 2 of 20

Question 3 of 20

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

1.None

2.NO2

3.NO

4.

N₂O

Question 3 of 20

Question 4 of 20

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

1.P

2.Bi

3.N

4.Sb

Question 4 of 20

Question 5 of 20

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

1.The reaction is quite slow

2.The reaction does not go to complete

3.SO3 is insoluble in water

4.The reaction is highly exothermic

Question 5 of 20

Question 6 of 20

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

1.N₂O₅

2.NO

3.N₂O

4.NO₂

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 is highly inactive

2.oxygen is very inactive

3.oxygen is found in less conc.

4.nitrogen requires a catalyst

Question 7 of 20

Question 8 of 20

8. The compound N20 causes disease:

1.Hysterical Laughter

2.Tumor

3.Cancer

4.Sleeping Sickness

Question 8 of 20

Question 9 of 20

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

1.O₂^-

2.O2

3.O₂+

4.O₂^2-

Question 9 of 20

Question 10 of 20

10. 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.Very less reactive gas

3.Moderately reactive gas

4.Completely inert like noble gases

Question 10 of 20

Question 11 of 20

11. Oxidation of NO in air produces

1.N₂O₅

2.N₂O

3.N₂0₃

4.N₂0₄

Question 11 of 20

Question 12 of 20

12. Gold dissolves in aqua regain to form.

1.Aul₂

2.Aul₃

3.Au₂(SO₄)₃

4.AuCl₃

Question 12 of 20

Question 13 of 20

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

1.N2O5

2.NO

3.NO2

4.N2O

Question 13 of 20

Question 14 of 20

14. NO2 is called

1.Nitrous oxide

2.Nitric anhydride

3.Nitrite oxide

4.Nitrogen peroxide

Question 14 of 20

Question 15 of 20

15. The lowest ionization energy is possessed by:

1.P

2.Bi

3.N

4.Sb

Question 15 of 20

Question 16 of 20

16. Chemical formula of laughing gas is

1.N₂O

2.N₂O₄

3.N₂O₃

4.NO

Question 16 of 20

Question 17 of 20

17. Which catalyst is used in contact process

1.V₂O₅

2.SO3

3.Ag₂O

4.Fe₂O₃

Question 17 of 20

Question 18 of 20

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

1.S

2.Se

3.Po

4.Te

Question 18 of 20

Question 19 of 20

19. Laughing gas is:

1.N₂O₂

2.N₂O

3.NO₃

4.NO

Question 19 of 20

Question 20 of 20

20. The most electronegative element in group-VA is

1.P

2.Sb

3.N

4.As

Question 20 of 20

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