Amorphous Forms of Carbon

Question 1

What is Charcoal?

Answer 1

When a solid organic compound is heated in controlled supply of air, it leaves behind a grey residue, commonly called charcoal.

Question 2

Define Adsorption.

Answer 2

Adsorption is the process due to which a substance accumulates gases, liquids or solids on its outer surface.

Question 3

State two physical properties of wood charcoal.

Answer 3

It is a grey brittle solid, porous in nature

It is a bad conductor of heat and electricity

Question 4

How does wood charcoal react with oxygen? support your answer with the following support answer with an equation.

Answer 4

When wood Charcoal is heated in air, or in oxygen, it catches fire at 400° C and burns without a flame to form carbon dioxide and liberates a large amount of heat energy.
(equation)

Question 5

How does wood charcoal react with Steam? Support your answer with the following support answer with an equation.

Answer 5

When superheated steam is passed through white-hot charcoal, it reduces steam to a mixture of carbon monoxide and hydrogen, which is commonly called water gas.
(equation)

Question 6

How does wood charcoal react with Copper Oxide? Support your answer with the following support answer with an equation.

Answer 6

When copper oxide is heated with powdered charcoal, they produce copper and carbon monoxide.
(equation)

Question 7

State four uses of wood charcoal.

Answer 7

Hint:

1. Household fuels
2. Reducing Agent
3. Deodrants and Disinfectants
4. Gunpowder.

Question 8

State the composition of bones.

Answer 8

60% Calcium phosphate; 40% Organic Matter

Question 9

State a use of Bone Charcoal.

Answer 9

Decolourising sugarcane juice during manufacture of Sugar.

Question 10

State three uses of Lamp Black.

Answer 10

1. Kajal
2. black paint
3. printer ink

Question 11

State 1 use of each of the product formed when coal is subjected to destructive distillation.

Answer 11

1. Coke- household fuel
2. Coal Tar- Chemicals such as benezene and phenol
3. Gas Carbon- electrodes for dry cell
4. Converted to Ammonium Sulphate and used as fertiliser
5. Coal Gas- purified and used as household fuel

Question 12

How is wood charcoal prepared on a large scale?

Answer 12

Text

Question 13

How is Bone Charcoal Prepared?

Answer 13

TEXT

Question 14

How is Lamp Black prepared on large scale?

Answer 14

TEXT

Question 15

How is Coal formed in Nature?

Answer 15

Textbook

Question 16

Name the various varieties of coal. Discuss the Carbon Content in them.

Answer 16

1. Peat- 50-60%
2. Lignite- 60-70%
3. Bitumin- 75-80%
4. Anthracite- 90-95%

Question 17

State 4 important uses of Coal.

Answer 17

1. Coke
2. Coal Gas
3. Fuel
4. Synthetic Petroleum