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.NO

3.N2O5

4.NO2

Question 1 of 20

Question 2 of 20

2. Chemical formula of laughing gas is

1.N₂O₃

2.N₂O₄

3.NO

4.N₂O

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.Po

2.Se

3.Te

4.S

Question 3 of 20

Question 4 of 20

4. 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 4 of 20

Question 5 of 20

5. Laughing gas is chemically

1.N₂O

2.NO₂

3.NO

4.N₂O₄

Question 5 of 20

Question 6 of 20

6. The compound N20 causes disease:

1.Tumor

2.Hysterical Laughter

3.Cancer

4.Sleeping Sickness

Question 6 of 20

Question 7 of 20

7. The lowest ionization energy is possessed by:

1.Bi

2.P

3.Sb

4.N

Question 7 of 20

Question 8 of 20

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

1.N₂O₅

2.NO

3.NO₂

4.N₂O

Question 8 of 20

Question 9 of 20

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

1.NO2

2.

N₂O

3.NO

4.None

Question 9 of 20

Question 10 of 20

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

1.O₂+

2.O₂^-

3.O₂^2-

4.O2

Question 10 of 20

Question 11 of 20

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

1.Sb 

2.P

3.N

4.As

Question 11 of 20

Question 12 of 20

12. 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.Completely inert like noble gases

3.Moderately reactive gas

4.Very less reactive gas

Question 12 of 20

Question 13 of 20

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

1.SO3 is insoluble in water

2.The reaction is quite slow

3.The reaction does not go to complete

4.The reaction is highly exothermic

Question 13 of 20

Question 14 of 20

14. The most electronegative element in group-VA is

1.Sb

2.P

3.N

4.As

Question 14 of 20

Question 15 of 20

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

1.N

2.Bi

3.P

4.Sb

Question 15 of 20

Question 16 of 20

16. NO2 is called

1.Nitrous oxide

2.Nitrite oxide

3.Nitrogen peroxide

4.Nitric anhydride

Question 16 of 20

Question 17 of 20

17. Gold dissolves in aqua regain to form.

1.Aul₂

2.Aul₃

3.Au₂(SO₄)₃

4.AuCl₃

Question 17 of 20

Question 18 of 20

18. Which catalyst is used in contact process

1.SO3

2.Fe₂O₃

3.Ag₂O

4.V₂O₅

Question 18 of 20

Question 19 of 20

19. Laughing gas is:

1.N₂O₂

2.NO₃

3.NO

4.N₂O

Question 19 of 20

Question 20 of 20

20. Oxidation of NO in air produces

1.N₂O

2.N₂0₃

3.N₂0₄

4.N₂O₅

Question 20 of 20

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