Fill in the blanks.
Charcoal is prepared by the _______ distillation of wood, bone, or sugar. (fractional/destructive)
Final answer: Charcoal is prepared by the destructive distillation of wood, bone, or sugar.
Write 'true' or 'false' against the following statements :
(a) Charcoal is a good adsorbent.
(b) Coke is obtained by destructive distillation of sugar.
(c) Activated charcoal is a good conductor of electricity.
(d) Wood charcoal is an important constituent of gun powder.
(e) Coal gas is used in the preparation of artificial fertilizers.
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?
The various compounds present in coal tar are separated by the process of :
(a) simple distillation
(b) destructive distillation
(c) fractional distillation
(d) fractional crystallisation
Give two uses for each of the following :
(a) coal
(b) coke
(c) wood charcoal
(d) sugar charcoal
(e) bone charcoal
(f) lamp black
Choose the correct alternative :
(a) Anthracite is
(i) an inferior type of coal
(ii) a superior type of coal
(iii) the cheapest form of coal
(iv) none of the above
(b) Destructive distillation of coal yields
(i) coal tar
(ii) coal gas
(iii) coke
(iv) all of the above
(c) Lamp black is
(i) an amorphous form of carbon
(ii) a crystalline form of carbon
(iii) a pure form of carbon
(iv) a cluster of carbon atoms
(d) The process by which decayed plants slowly convert into coal is called
(i) petrification
(ii) carbonisation
(iii) carbonification
(iv) fermentation
(e) The purest form of the amorphous carbon is
(i) wood charcoal
(ii) sugar charcoal
(iii) bone charcoal
(iv) lamp black