# 12th Class Chemistry Mcqs With Answers Chapter 3| 2nd Year chemistry mcqs with answers pdf

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:

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