What happens when washing soda and baking soda are heated?

Thermodynamically the most stable form of carbon is

• diamond

• graphite

• fullerenes

• coal

Elements of group 14

• exhibit oxidation state of +4 only
• exhibit oxidation state of + 2 and + 4
• form M^2– and M⁴⁺ ion
• form M²⁺ and M⁴⁺ ion

Give the chemical formuale of:
(i) Carborundum        (ii) Dry ice.

Give the chemical name of compound used as fire extinguisher under the name pyrene.

Give the formula of a compound used as refrigerant.

Give the formula of a compound used as refrigerant.

Which allotrope of carbon is used in making electrodes?

50.

Why are carbon compounds relatively inert ?