GOV EXAM ADDA

1. Select the incorrect statement regarding the carbon compounds

A. These are not easily combustible

B. They mainly contain carbon and Hydrogen

C. They have low melting and boiling point

D. Insoluble in water

Answer & Solution

2. The common name of sodium bicarbonate is ___

Answer & Solution

3. Helium gas is filled in the balloon instead of Hydrogen because its

A. Non-Combustible

B. More stable

C. Lighter than hydrogen

D. More abundant than Hydrogen

Answer & Solution

4. No. of unpaired electron in inert gas is

Answer & Solution

5. Chemical name of common salt is

A. Ammonium chloride

B. Calcium chloride

C. Sodium chloride

D. Sodium nitrate

Answer & Solution

6. Chemical name of baking soda is

A. Sodium isolate

B. Sodium nitrate

C. Aluminium bicarbonate

D. Sodium chloride

Answer & Solution

7. Why Helium gas used in balloons?

A. It’s one of the constitutions of water

B. Its atomic number is two

C. It’s a noble gas

D. Its Light than air

Answer & Solution

11. A balloon filled with Helium rise in air because

A. Helium pushes down the air below the balloon

B. Helium is less dense than air

C. Air exerts on upward force on the balloon

D. The balloon is weightless

Answer & Solution

12. Commonly sodium is kept under the

Answer & Solution

13. Sodium carbonate commonly known as

Answer & Solution

14. Motor is a mixture of water, sand

Answer & Solution

15. Which gas is filled in balloon?

Answer & Solution

16. Which of the following can be used as an anesthetic?

Answer & Solution

17. Chemical formula of washing soda is

Answer & Solution

18. Most commonly bleaching agent is

Answer & Solution

19. Which of the following Noble gas can forms compound?

Answer & Solution

20. Dry power fire extinguisher contains

A. Sand and potassium carbonate

B. Sand and sodium bicarbonate

C. Sand

D. Sand and sodium carbonate

Answer & Solution

21. Which of the following is false?

A. Deuterium ia called heavy hydrogen

B. Protium is the rarest isotope of hydrogen

C. Hydrogen atom is roughly a third of the mass of tritium

D. Deuterium atom has 1 neutron

Answer & Solution

22. Zeolite is

A. Aluminium silicate

B. Sodium tetraborate

C. Hydrated ferric oxide

D. Hydrated sodium

Answer & Solution

23. Helium is added to the oxygen supply of deep sea diver because it is ____

A. Readily miscible with oxygen

B. Less soluble in blood than nitrogen at high pressure

C. Less poisonous than nitrogen

D. lighter than nitrogen

Answer & Solution

24. Water is used in a hot water bag because

A. It has high specific heat

B. Isis a liquid substance

C. It is easily available

D. It has high specific gravity

Answer & Solution

1. Select the incorrect statement regarding the carbon compounds

2. The common name of sodium bicarbonate is ___

3. Helium gas is filled in the balloon instead of Hydrogen because its

4. No. of unpaired electron in inert gas is

5. Chemical name of common salt is

6. Chemical name of baking soda is

7. Why Helium gas used in balloons?

8. White phosphorous is placed under the

9. Sodium chloride or Table salt occurs in nature as the mineral

10. Noble gas used in the treatment of cancer is

11. A balloon filled with Helium rise in air because

12. Commonly sodium is kept under the

13. Sodium carbonate commonly known as

14. Motor is a mixture of water, sand

15. Which gas is filled in balloon?

16. Which of the following can be used as an anesthetic?

17. Chemical formula of washing soda is

18. Most commonly bleaching agent is

19. Which of the following Noble gas can forms compound?

20. Dry power fire extinguisher contains

21. Which of the following is false?

22. Zeolite is

23. Helium is added to the oxygen supply of deep sea diver because it is ____

24. Water is used in a hot water bag because