Some Gases

1 Marks Question

1. By Which property of carbon dioxide it helps in extinguish the fire?
2. Carbon dioxide is heavier than air. It neither burns nor supports burning. So, carbon dioxide helps in extinguishing the fire.
3. Name two chemicals that are required to prepare carbon dioxide gas in laboratory.
4. Chemicals that are required to prepare carbon dioxide gas in laboratory are dilute hydrochloric acid (HCl), marble pieces (CaCO₃).
5. Which gas is obtained by heating the mixture of ammonium chloride and calcium hydroxide?
6. Ammonia gas is prepared in laboratory by heating the mixture of ammonium chloride and calcium hydroxide.
7. Name two chemicals that are required to prepare ammonia gas in laboratory.
8. Chemicals that are required to prepare ammonia gas in laboratory are ammonium chloride (NH₄Cl), calcium hydroxide (Ca(OH)₂).
9. Which gas is used to take out blue print?
10. Ammonia gas is used to take out blue print.
11. What is Haber's process?
12. The process in which ammonia is manufactured in large scale by combination reaction of nitrogen and hydrogen in the ratio of 1:3 at 200-900 atm pressure, 400-500°C temperature, using fine powder of iron as catalyst and Molybdenum as promoter is called Haber's process.
    $\ce{N2 + 3H2 <=>[Fe/Mo][500°C, 200-900 Atm] 2NH3}$
13. Write any two uses of carbon dioxide gas.
14. The uses of carbon dioxide gas are listed below:
    
    1. Carbon dioxide is used in the drinks such as soda water, soft drinks etc.
    2. It is used as a raw material for the photosynthesis by the green plants.
15. What is dry ice? Write its one use.
16. When carbon dioxide is cooled at -78°C, it changes into a white solid, which is known as dry ice. It is used to preserve fruits, fish, and meat products for a long time.