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Question

Answer the following questions :

(a) What is destructive distillation? What are the products formed due to the destructive distillation of coal?

(b) Why are wood charcoal used in water filters and gas masks?

(c) How is wood charcoal made locally? What other substances are formed in the process?

(d) How many carbon atoms are there in Buckminster fullerenes?

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Solution

(a) Destructive Distillation: When a substance is heated in the absence of air. The process is called destructive distillation.
Products formed are: Coke, Coal tar, Coal gas, and ammonia solution
(b) Wood charcoal has a porous surface that can absorb liquids and gases. It is used in water filters and gas masks. It is used to adsorb hazardous gases as gas masks. Because it is porous, it is used to filter water.

(c) Wood charcoal is prepared when the wood is heated in a limited supply of air. Locally wood charcoal is prepared by piling logs of wood one above the other with a gap in the centre of the pile. The pile is covered with wet clay to prevent the entry of air. A few holes are left at the bottom of the pile. The wood is set on fire. After some time when the fire dies out, wood charcoal is left behind. The other substances are -wood tar, pyroligneous acid, and wood gas.

(d) 60 carbon atoms are arranged in a spherical structure in Buck minster fullerenes.


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