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.SO3

2.V₂O₅

3.Ag₂O

4.Fe₂O₃

Question 1 of 20

Question 2 of 20

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

1.Po

2.Te

3.S

4.Se

Question 2 of 20

Question 3 of 20

3. NO2 is called

1.Nitric anhydride

2.Nitrogen peroxide

3.Nitrous oxide

4.Nitrite oxide

Question 3 of 20

Question 4 of 20

4. The lowest ionization energy is possessed by:

1.N

2.Sb

3.Bi

4.P

Question 4 of 20

Question 5 of 20

5. Gold dissolves in aqua regain to form.

1.Au₂(SO₄)₃

2.Aul₂

3.AuCl₃

4.Aul₃

Question 5 of 20

Question 6 of 20

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

1.The reaction is quite slow

2.SO3 is insoluble in water

3.The reaction is highly exothermic

4.The reaction does not go to complete

Question 6 of 20

Question 7 of 20

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

1.As

2.Sb 

3.P

4.N

Question 7 of 20

Question 8 of 20

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

1.O₂^-

2.O2

3.O₂^2-

4.O₂+

Question 8 of 20

Question 9 of 20

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

1.Bi

2.P

3.Sb

4.N

Question 9 of 20

Question 10 of 20

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

1.N₂O₅

2.NO₂

3.N₂O

4.NO

Question 10 of 20

Question 11 of 20

11. 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.nitrogen requires a catalyst

3.oxygen is very inactive

4.oxygen is found in less conc.

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.Moderately reactive gas

3.Very less reactive gas

4.Completely inert like noble gases

Question 12 of 20

Question 13 of 20

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

1.NO2

2.N2O5

3.NO

4.N2O

Question 13 of 20

Question 14 of 20

14. The compound N20 causes disease:

1.Hysterical Laughter

2.Cancer

3.Sleeping Sickness

4.Tumor

Question 14 of 20

Question 15 of 20

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

1.

N₂O

2.NO

3.None

4.NO2

Question 15 of 20

Question 16 of 20

16. Oxidation of NO in air produces

1.N₂0₄

2.N₂O

3.N₂O₅

4.N₂0₃

Question 16 of 20

Question 17 of 20

17. Laughing gas is chemically

1.N₂O

2.NO

3.N₂O₄

4.NO₂

Question 17 of 20

Question 18 of 20

18. Laughing gas is:

1.NO₃

2.NO

3.N₂O

4.N₂O₂

Question 18 of 20

Question 19 of 20

19. Chemical formula of laughing gas is

1.NO

2.N₂O₃

3.N₂O

4.N₂O₄

Question 19 of 20

Question 20 of 20

20. The most electronegative element in group-VA is

1.As

2.N

3.P

4.Sb

Question 20 of 20

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