12th Class Chemistry Mcqs With Answers Chapter 4| 2nd Year chemistry mcqs with answers pdf

12th Class Chemistry Mcqs With Answers Chapter 1	12th Class Chemistry Mcqs With Answers Chapter 2
12th Class Chemistry Mcqs With Answers Chapter 3	12th Class Chemistry Mcqs With Answers Chapter 4
12th Class Chemistry Mcqs With Answers Chapter 5	12th Class Chemistry Mcqs With Answers Chapter 6
12th Class Chemistry Mcqs With Answers Chapter 7	12th Class Chemistry Mcqs With Answers Chapter 8
12th Class Chemistry Mcqs With Answers Chapter 9	12th Class Chemistry Mcqs With Answers Chapter 10
12th Class Chemistry Mcqs With Answers Chapter 11	12th Class Chemistry Mcqs With Answers Chapter 12
12th Class Chemistry Mcqs With Answers Chapter 13	12th Class Chemistry Mcqs With Answers Chapter 14
12th Class Chemistry Mcqs With Answers Chapter 15	12th Class Chemistry Mcqs With Answers Chapter 16
12th Class Chemistry Mcqs With Answers Chapter 17	12th Class Chemistry Mcqs With Answers Chapter 18
12th Class Chemistry Mcqs With Answers Chapter 19	12th Class Chemistry Mcqs With Answers Chapter 20

Chapter No 4

Group VA And VIA Elements

1. In group V-A element the most electronegative element is choose which one is correct:

1. Sb
2. N
3. P
4. As

2. Which one the following elements occur free in nature choose which one is correct:

1. Sb
2. As
3. N
4. P

3. Which one of the following compounds is not known choose which one is correct:

1. SbCl₃
2. NCl₃
3. NI₃
4. NCl₅

4. Which is a laughing gas choose which one is correct:

1. N₂O₅
2. N₂O
3. NO
4. N₂O₄

5. Oxidation of NO in air produces choose which one is correct:

1. N₂O
2. N₂O₄
3. N₂O₃
4. N₂O₅

6. Yellow colour of Nitiric Acid is due to the presence of choose which one is correct:

1. NO₂
2. NO
3. N₂O
4. N₂O₄

7. Gold dissolve in Aqua regia to give choose which one is correct:

1. AuCl₂
2. AuCl
3. AuCl₃
4. None

8. When red phosphorous is heated with HNO₃ it forms choose which one is correct:

1. H₃PO₄
2. HPO₂
3. H₂PO₃
4. H₃PO₃

9. Which of the following is used at the tips of match stick choose which one is correct:

1. K₂Cr₂O₇ + S + White P
2. K₂Cr₂O₇ + K + S
3. S and K
4. Sb₂S₃

10. What is the number of electrons present in the valence shell of P in PCl₃ choose which one is correct:

1. 4
2. 6
3. 8
4. 2

11. Phosphorous shows oxidation state (+3) in which of the following choose which one is correct:

1. H₄P₂O₇
2. PO⁻³₄
3. H₃PO₃
4. H₃PO₄

12. Which element is the most abundant in the earth’s crust choose which one is correct:

1. Fe
2. O
3. Si
4. C

13. Which catalyst is used in contact process choose which one is correct:

1. Fe₂O₃
2. V₂O₅
3. SO₃
4. Ag₂O

14. The brown gas formed when metal reduces HNO₃ is choose which one is correct:

1. N₂O₅
2. N₂O₃
3. NO₂
4. NO

15. Which of the following specie has the maximum number of unpaired  electrons choose which one is correct:

1. O⁻¹₂
2. O⁺²₂
3. O⁻²₂
4. O₂

16. The contact process for the manufacturing of H₂SO₄ was developed by choose which one is correct:

1. Jabir-Bin-Hayan
2. Knietsch
3. Al-Khwarzmi
4. Mendleeve

17. In which compound of nitrogen, the oxidation state of N is (+1) choose which one is correct:

1. N₂O
2. NO
3. NO₂
4. N₂O₄

18. FeSO₄ forms brown ring with choose which one is correct:

1. N₂O₄
2. NO
3. NO₂
4. None of these

19. “Lead” in lead pencil is choose which one is correct:

1. Bone black
2. Graphite and clay
3. Lead oxide
4. Lead peroxide

20. Formula of Gibbsite is choose which one is correct:

1. Al₂O₃
2. Al₂O₃ . H₂O
3. Al₂O₃ . 2H₂O
4. Al₂O₃ . 3H₂O