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. Gold dissolves in aqua regain to form.

1.Au₂(SO₄)₃

2.AuCl₃

3.Aul₃

4.Aul₂

Question 1 of 20

Question 2 of 20

2. Laughing gas is chemically

1.N₂O

2.N₂O₄

3.NO₂

4.NO

Question 2 of 20

Question 3 of 20

3. The compound N20 causes disease:

1.Tumor

2.Hysterical Laughter

3.Cancer

4.Sleeping Sickness

Question 3 of 20

Question 4 of 20

4. Oxidation of NO in air produces

1.N₂0₄

2.N₂O

3.N₂O₅

4.N₂0₃

Question 4 of 20

Question 5 of 20

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

1.

N₂O

2.NO2

3.None

4.NO

Question 5 of 20

Question 6 of 20

6. NO2 is called

1.Nitrous oxide

2.Nitric anhydride

3.Nitrite oxide

4.Nitrogen peroxide

Question 6 of 20

Question 7 of 20

7. The most electronegative element in group-VA is

1.As

2.P

3.Sb

4.N

Question 7 of 20

Question 8 of 20

8. Which catalyst is used in contact process

1.Ag₂O

2.SO3

3.Fe₂O₃

4.V₂O₅

Question 8 of 20

Question 9 of 20

9. The lowest ionization energy is possessed by:

1.N

2.Sb

3.Bi

4.P

Question 9 of 20

Question 10 of 20

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

1.N2O5

2.N2O

3.NO

4.NO2

Question 10 of 20

Question 11 of 20

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

1.N₂O₅

2.NO

3.N₂O

4.NO₂

Question 11 of 20

Question 12 of 20

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

1.O2

2.O₂^-

3.O₂^2-

4.O₂+

Question 12 of 20

Question 13 of 20

13. Chemical formula of laughing gas is

1.N₂O₄

2.N₂O₃

3.N₂O

4.NO

Question 13 of 20

Question 14 of 20

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

1.Sb 

2.P

3.N

4.As

Question 14 of 20

Question 15 of 20

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

1.The reaction is highly exothermic

2.The reaction does not go to complete

3.The reaction is quite slow

4.SO3 is insoluble in water

Question 15 of 20

Question 16 of 20

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

1.S

2.Po

3.Se

4.Te

Question 16 of 20

Question 17 of 20

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

1.N

2.Bi

3.Sb

4.P

Question 17 of 20

Question 18 of 20

18. Laughing gas is:

1.N₂O

2.NO₃

3.NO

4.N₂O₂

Question 18 of 20

Question 19 of 20

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

1.oxygen is very inactive

2.nitrogen is highly inactive

3.oxygen is found in less conc.

4.nitrogen requires a catalyst

Question 19 of 20

Question 20 of 20

20. 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.Very less reactive gas

4.Moderately reactive gas

Question 20 of 20

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