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 catalyst is used in contact process

1.Fe₂O₃

2.V₂O₅

3.SO3

4.Ag₂O

Question 1 of 20

Question 2 of 20

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

1.NO

2.

N₂O

3.NO2

4.None

Question 2 of 20

Question 3 of 20

3. Laughing gas is chemically

1.N₂O

2.NO₂

3.N₂O₄

4.NO

Question 3 of 20

Question 4 of 20

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

1.O₂+

2.O₂^-

3.O2

4.O₂^2-

Question 4 of 20

Question 5 of 20

5. NO2 is called

1.Nitrite oxide

2.Nitrogen peroxide

3.Nitric anhydride

4.Nitrous oxide

Question 5 of 20

Question 6 of 20

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

1.NO

2.NO₂

3.N₂O₅

4.N₂O

Question 6 of 20

Question 7 of 20

7. Oxidation of NO in air produces

1.N₂0₄

2.N₂O₅

3.N₂O

4.N₂0₃

Question 7 of 20

Question 8 of 20

8. The lowest ionization energy is possessed by:

1.N

2.Sb

3.Bi

4.P

Question 8 of 20

Question 9 of 20

9. 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 9 of 20

Question 10 of 20

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

1.Se

2.Po

3.Te

4.S

Question 10 of 20

Question 11 of 20

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

1.NO

2.NO2

3.N2O5

4.N2O

Question 11 of 20

Question 12 of 20

12. Gold dissolves in aqua regain to form.

1.Aul₃

2.AuCl₃

3.Au₂(SO₄)₃

4.Aul₂

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.Sb

2.Bi

3.P

4.N

Question 13 of 20

Question 14 of 20

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

1.oxygen is found in less conc.

2.oxygen is very inactive

3.nitrogen requires a catalyst

4.nitrogen is highly inactive

Question 14 of 20

Question 15 of 20

15. Laughing gas is:

1.NO₃

2.N₂O₂

3.NO

4.N₂O

Question 15 of 20

Question 16 of 20

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

1.The reaction does not go to complete

2.The reaction is quite slow

3.The reaction is highly exothermic

4.SO3 is insoluble in water

Question 16 of 20

Question 17 of 20

17. Chemical formula of laughing gas is

1.N₂O

2.N₂O₃

3.N₂O₄

4.NO

Question 17 of 20

Question 18 of 20

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

1.Sb 

2.N

3.As

4.P

Question 18 of 20

Question 19 of 20

19. The most electronegative element in group-VA is

1.Sb

2.P

3.As

4.N

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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