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.NO

2.N2O5

3.NO2

4.N2O

Question 1 of 20

Question 2 of 20

2. The most electronegative element in group-VA is

1.Sb

2.P

3.N

4.As

Question 2 of 20

Question 3 of 20

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

1.Se

2.S

3.Po

4.Te

Question 3 of 20

Question 4 of 20

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

1.P

2.Sb 

3.N

4.As

Question 4 of 20

Question 5 of 20

5. Laughing gas is:

1.NO

2.N₂O

3.N₂O₂

4.NO₃

Question 5 of 20

Question 6 of 20

6. NO2 is called

1.Nitrogen peroxide

2.Nitric anhydride

3.Nitrite oxide

4.Nitrous oxide

Question 6 of 20

Question 7 of 20

7. Chemical formula of laughing gas is

1.N₂O₃

2.NO

3.N₂O

4.N₂O₄

Question 7 of 20

Question 8 of 20

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

1.The reaction does not go to complete

2.SO3 is insoluble in water

3.The reaction is quite slow

4.The reaction is highly exothermic

Question 8 of 20

Question 9 of 20

9. Laughing gas is chemically

1.NO₂

2.NO

3.N₂O₄

4.N₂O

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.Moderately reactive gas

2.Completely inert like noble gases

3.Highly reactive gas

4.Very less reactive gas

Question 10 of 20

Question 11 of 20

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

1.O₂^-

2.O₂+

3.O2

4.O₂^2-

Question 11 of 20

Question 12 of 20

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

1.NO2

2.None

3.NO

4.

N₂O

Question 12 of 20

Question 13 of 20

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

1.Bi

2.P

3.N

4.Sb

Question 13 of 20

Question 14 of 20

14. Gold dissolves in aqua regain to form.

1.Aul₃

2.AuCl₃

3.Au₂(SO₄)₃

4.Aul₂

Question 14 of 20

Question 15 of 20

15. Which catalyst is used in contact process

1.SO3

2.Fe₂O₃

3.Ag₂O

4.V₂O₅

Question 15 of 20

Question 16 of 20

16. 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 found in less conc.

3.oxygen is very inactive

4.nitrogen requires a catalyst

Question 16 of 20

Question 17 of 20

17. The compound N20 causes disease:

1.Sleeping Sickness

2.Cancer

3.Tumor

4.Hysterical Laughter

Question 17 of 20

Question 18 of 20

18. Oxidation of NO in air produces

1.N₂O₅

2.N₂0₄

3.N₂O

4.N₂0₃

Question 18 of 20

Question 19 of 20

19. The lowest ionization energy is possessed by:

1.Bi

2.Sb

3.P

4.N

Question 19 of 20

Question 20 of 20

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

1.N₂O₅

2.NO₂

3.N₂O

4.NO

Question 20 of 20

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