Write three differences between graphite and diamond.

Fill in the blanks:

(a) …………… is formed when charcoal is burnt in a limited supply of air.

(b) Coal is a …………… form of carbon.

(c) …………… is the most inferior form of coal.

(d) Wood charcoal is a …………… conductor of heat and electricity.

(e) …………… is used in making black shoe polish.

Destructive distillation of coal yields

1. coal tar
2. coal gas
3. coke
4. all of the above

Lamp black is

1. an amorphous form of carbon
2. a crystalline form of carbon
3. a pure form of carbon
4. a cluster of carbon atoms