The hardest form of carbon is
A). coke
B). graphite
C). diamond
D). charcoal
diamond
The allotropes of carbon include graphite, one of the softest known substances, and diamond, the hardest naturally occurring substance.
1. The most abundant inert gas in the atmosphere is
2. Which of the inert gases can form compounds?
3. The chemical(s) most commonly used for cloud seeding or artificial rainmaking is are
4. Sea weeds are important source of
5. Petroleum consists of a mixture of
6. Which halide is used in making sensitive emulsion on photograhic film?
7. Which one of the following metals is used to galvanise iron
8. Deficiency of which one of the following cause xerophthalmia-