Question

Q.1 Name the following:
[5]
1. A crystalline allotrope of carbon built up from a hexagonal unit.
2. An allotrope of carbon used for the manufacture of coke.
3. An amorphous allotrope of carbon which floats on water.
4. An acid formed when carbon dioxide is dissolved in water under pressure.
5. The gaseous product obtained when carbon monoxide is passed over heated iron [III] oxide.​

Answer 1

Answer:

1 Graphite

A crystalline allotrope of carbon built up from a hexagonal unit. Answer: Graphite. An allotrope of carbon used for the manufacture of coke.

Graphite

2 Graphite is a highly refractory material with a high melting point. The test methods for coke are necessary for defining the coke as a fuel (for internal use in a refinery) or for other uses, particularly those test methods where prior sale of the coke is involved.

Answer 2

Explanation:

Graphite

Coal

Wood charcoal

Carbonic acid

Carbon dioxide