Question

Circle the odd one out. Give reasons for your choice.
1-Carbon dioxide in atmosphere, carbon dioxide in volcanic regions, carbon dioxide as
metal carbonates, carbon dioxide in coal mines.
2- Diamond, graphite, fullerene, charcoal
3. Graphite, charcoal, coke, bone charcoal, gas carbon
4. Lead of pencils, sharp-edged cutters, electrodes, lubricant​

Answer 1

Answer:

diamond, graphite

Explanation:

It occurs as diamond, graphite in impure form as coal, in the free state. It occurs as carbon dioxide in the atmosphere, hydro-carbon as natural gas, petroleum, cellulose in wood and limestone in combined states.