Carbon Compound and Petroleum Worksheet-3

Carbon Compound and Petroleum Worksheet-3

Fill in Blanks.

1. Crystallization of carbon to form diamonds take place when ______ metal expands during solidification.

2. Carbon monoxide is slightly ______ than air.

3. The compound of carbon used to soften hard water is ____.

4. ____ acid on reaction with H₂SO₄ gives only carbon monoxide (CO).

5. Methane (CH₄) is prepared in laboratory by heating anhydrous sodium acetate with _____.

6. Sugar on reaction with _____ gives sugar charcoal.

7. Gas carbon is used as ______ in dry cell.

True or False.

8. Graphite can be transformed into diamond by applying a pressure greater than 100000 times the atmospheric pressure and at 3700º.

9. In CH₄, all the H can be replaced by Chlorine atoms when the reaction takes place in Presence of sunlight.

10. Foam type extinguisher is used to extinguish any type of fire.

11. CaCO₃ is used as an ant-acid.

Match the following.

Answer Key:

1. Iron
2. Lighter
3. Na₂CO₃
4. Formic
5. Soda lime
6. Conc. H₂SO₄
7. Electrodes
8. True
9. True
10. False
11. True
12. A-Q; B-R; C-T; D-P; E-S