Subject Experts Solutions for Chapter: Carbon and its Compounds, Exercise 2: PRACTICE QUESTIONS (COMPETITION WING)

Arrange the steps in the process of carbon cycle, starting from the abundant state of existence of carbon in the combined state in their correct sequence.

1. Dead remains
2. ${\mathrm{CO}}_2$ in the atmosphere.
3. Organic matter.
4. Plants.
5. Fossil fuels.

Arrange the steps in the process of carbon cycle, starting from the substances which possess a mixture of hydrocarbons in a proper sequence.

1. Sea water.
2. Dead remains.
3. Aquatic plants.
4. ${\mathrm{CO}}_2$ in the atmosphere.
5. Organic matter.
6. Fossil fuels.

Graphite fibres are used to reinforce plastic as they

In the manufacture of graphite by Acheson process, the charge filled between the cathode and anode consists of 

The compound which builds up the greenhouse effect is

The use of diamond as a gem is due to its

To a small quantity of $\mathrm{X}$, few drops of $\mathrm{HCl}$ are added. Consequently, a colourless, odourless gas is produced. This gas in passing through lime water turns it milky proving the presence of _____ in $\mathrm{X}$.

_____ is used extensively in the manufacture of washing soda.