12th Class Chemistry Mcqs With Answers Chapter 3| 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 3

Group lllA And Group IVA Elements

1. Which metal is used in thermite process because of its activity choose one among the following which is correct:

1. Fe
2. Cu
3. Al
4. Zn

2. Aluminum oxide is choose one among the following which is correct:

1. Acidic
2. Basic
3. Amphotric
4. None of these

3. Which element form an ion with change +3 choose one among the following which is correct:

1. Be
2. Al
3. C
4. Si

4. Which of the  element is not present abundantly in earth’s crust choose one among the following which is correct:

1. Si
2. Al
3. Na
4. O

5. Which of the  radicals give blue colour (in cold and hot state) in  oxidizing flame when subjected to Borax Bead test choose one among the following which is correct:

1. Cu⁺²
2. Co⁺²
3. Cr⁺³
4. Ni⁺²

6. Sulphur is not present in choose one among the following which is correct:

1. Onion
2. Garlic
3. Egg
4. Fat

7. Which is the formula of clay choose one among the following which is correct:

1. Al₂O₃ . SiF₄
2. Al₂O₃
3. Na₂O₃ . 2H₂O
4. Al₂O₃ . 2SiO₂ . 2H₂O

8. BF₃ acts as Lewis acid because it behaves as choose one among the following which is correct:

1. Free radical
2. Cationic specie
3. Electrophile
4. Nucleophile

9. Which of the gas will turns lime water milky choose one among the following which is correct:

1. Cl₂
2. NO₂
3. CO
4. CO₂

10. Elements which exhibits maximum catenation property choose one among the following which is correct:

1. C
2. Pb₃O₄
3. Ge
4. PbO₂

11. Chrome yellow choose one among the following which is correct:

1. PbMoO₄
2. K₂Cr₂O₇
3. PbCrO₄
4. K₂CrO₄

12. Which is the formula of litharge choose one among the following which is correct:

1. PbO
2. PbO₂
3. Pb₃O₄
4. Pb₂O₃

13. A gas which burn with blue flame is choose one among the following which is correct:

1. CO₂
2. N₂
3. CO
4. NO

14. Which compound of silicon used as filler in soap to make it heavy choose one among the following which is correct:

1. SiO₂
2. Na₂SiO₃
3. H₂SiO₃
4. Silicones

15. Pb₃O₄ has chemical name of choose one among the following which is correct:

1. Litharge
2. Massicot
3. Sandhur
4. Halite

16. Stable shape in which PbCrO₄ exist choose one among the following which is correct:

1. Triclinic
2. Monoclinic
3. Rhomleric
4. None of these

17. Chief ore of Al is choose one among the following which is correct:

1. Na₃AlF₆
2. Al₂O₃ . 2H₂O
3. Al₂O₃
4. Al₂O₃ . H₂O

18. Tincal is a mineral of choose one among the following which is correct:

1. Al
2. B
3. Si
4. C

19. What is the nature of solution of Borax choose one among the following which is correct:

1. Neutral
2. Alkaline
3. Acidic
4. Corrosive

20. Which is the correct number of lone-pair with oxygen in CO choose one among the following which is correct:

1. 1
2. 2
3. 3
4. 4