Fill in the blanks:

(a) …………… is present in both living and non-living things.

(b) The tendency of an element to exist in two or more forms but in the same physical state is called …………… .

(c) …………… and …………… are the two major crystalline allotropes of carbon.

(d) …………… is the hardest substance that occurs naturally.

(e) The name 'carbon' is derived from the Latin word …………… .

In combined state, carbon occurs as

1. coal
2. diamond
3. graphite
4. petroleum

Graphite is not found in

1. Bihar
2. Maharashtra
3. Odisha
4. Rajasthan

Diamond is used for

1. making the electrodes of electric furnaces.
2. making crucibles for melting metals.
3. cutting and drilling rocks and glass.
4. making carbon brushes for electric motors.