12th Class Chemistry Mcqs With Answers Chapter 2| 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 2

S-block Elements

1. Which one  is not an alkali metals choose which one among the following is right:

1. Fr
2. Cs
3. Rb
4. Ra

2. Down’s cell is used to prepare choose which one among the following is right:

1. Na₂CO₃
2. NaHCO₃
3. Na
4. NaOH

3. Chile saltpeter has the chemical formula choose which one among the following is right:

1. NaNO₃
2. KNO₃
3. Na₂B₄O₇
4. Na₂B₄O₇ . 10H₂O

4. Which ion will have the maximum value of heat of hydration choose which one among the following is right:

1. Na⁺
2. Cs⁺
3. Ba⁺²
4. Mg⁺²

5. Beryllium metal is as hard as choose which one among the following is right:

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

6. One of the  alkali metals is the most reactive which is that choose which one among the following is right:

1. Cs
2. K
3. Na
4. Li

7. Which one does not give flame test choose which one among the following is right:

1. Zn
2. Ba
3. Sr
4. Ca  

8. Sodium metal cannot be stored in choose which one among the following is right:

1. Toluene
2. Alcohol
3. Benzene
4. Kerosene oil

9. Dolomite is a carbonate of choose which one among the following is right:

1. Ca and Ba
2. Mg and Al
3. Ca and Mg
4. Na

10. Which one configurations corresponds to an alkaline earth  metals choose which one among the following is right:

1. [Ar] 3d¹⁰ 4s²
2. [Ne] 3d²3p²
3. [Ar] 4s²
4. [Ar] 3d¹⁰ 4s¹

11. Dead burnt gypsum is choose which one among the following is right:

1. CaSO₄ . 2H₂O
2. CaSO₄ . ¹₂ H₂O
3. CaSO₄
4. MgSO₄ . 7H₂O

12. When some water is added to plaster of Paris, it becomes hard and expansion  in volume how much choose which one among the following is right:

1. 1%
2. 10%
3. 4%
4. 2%

13. Which of the  compound in formed when Na burn in excess of air choose which one among the following is right:

1.  NaO₂
2. Na₂O₂
3. Na₂O
4. Na₂O3

14. Chemical formula of slaked lime is choose which one among the following is right:

1. CaCO₃
2. Ca(OH)₂ . H₂O
3. Ca(OH)₂
4. CaSO₄

15. Which  is not a function of sulphur choose which one among the following is right:

1. Enlarged root system in plants
2. Chlorophyll development in leaves
3. Good yield of crops
4. Control of pH of soil

16. Which is produced at the cathode during the electrolysis of brine in Nelson’s  cell choose which one among the following is right:

1. H₂
2. Na
3. Cl₂
4. O₂

17. Which of the elements can produce H₂ gas when treated with  sodium hydroxide choose which one among the following is right:

1. Be
2. Mg
3. Ca
4. Sr

18. The operating temp of Down’s cell is choose which one among the following is right:

1. 800°C
2. 600°C
3. 1800°C
4. 900°C

19. CaMg₃(SiO₃)₄ is the composition of choose which one among the following is right:

1.  Dolomite
2. Gypsum
3. Calcite
4. Asbestos

20. Halite is chemical name of choose which one among the following is right:

1. KCl
2. NaCl
3. MgCl₂
4. SrCl₂