CBSE Class 8 Science Coal and Petroleum Worksheet Set A

              Questions

              Very Short Answer

Q1)       What is carbonisation?

Q2)       In India where we can find the natural gas?

Q3)       Define natural resources?

Q4)       What is petroleum?

Q5)       What are fossil fuels?

             Short Answer

 Q6)       What do you understand by the petroleum refinery?

Q7)       Distinguish between coal and petroleum?

Q8)       What are the important tips to save the petrol or diesel while driving?

Q9)       What do you mean by CNG?

Q10)     Why petroleum is known as black gold?

           Long Answer

 Q11)     Explain how the petroleum is formed?

Q12)     State the difference between coke and charcoal?

Q13)     Write short note on coke?

Q14)     State the difference between inexhaustible natural resources and exhaustible natural resources?

Q15)     Write short note on natural gas?

COAL & PETROLEUM 

Question. 1. Kerosene oil is a mixture of hydrocarbons containing number of carbon atoms -
(a) \( C_6 \) to \( C_{10} \)
(b) \( C_8 \) to \( C_{12} \)
(c) \( C_{11} \) to \( C_{16} \)
(d) \( C_{18} \) to \( C_{22} \)
Answer: C

Question. 2. The distillation of crude petroleum to obtain various commercially useful fraction is called :
(a) cracking
(b) hydroforming
(c) refining
(d) mining
Answer: C

Question. 3. Which of the following is used for refining of petroleum ?
(a) Steam distillation
(b) Distillation under reduced pressure
(c) Solvent extraction
(d) Fractional distillation
Answer: D

Question. 4. Which of the following is properly matched ?
(a) Kerosene – \( C_5 – C_{10} \)
(b) Diesel oil – \( C_5 – C_6 \)
(c) Petrol – \( C_7 – C_9 \)
(d) All are correct
Answer: C

Question. 5. Which of the following names represents the foul smelling, black, thick, viscous liquid obtained from destructive distillation of coal ?
(a) Coke
(b) Coal tar
(c) Coal gas
(d) None of these
Answer: B

Question. 6. Main constituents of coal gas are :
(a) \( H_2O, C_2H_6, O_2 \)
(b) \( CH_4, CO_2, O_2 \)
(c) \( CH_4, H_2, CO \)
(d) \( C_2H_6, N_2, O_2 \)
Answer: C

Question. 7. Which one of the following is not a petroleum product ?
(a) Kerosene
(b) Gasoline
(c) Pitch black
(d) Bees wax
Answer: D

Question. 8. Percentage of carbon present in an air dried sample of Anthracite is :
(a) 94 – 98%
(b) 27 – 30%
(c) 78 – 86%
(d) 27 %
Answer: D

Question. 9. Ammoniacal liquor is -
(a) ammonia absorbed in water
(b) ammonium hydroxide
(c) aqueous solution of ammonia
(d) All of the above
Answer: A

Question. 10. Which of the following products obtained by destructive distillation of coal, is not properly matched ?
(a) Coal tar – Dyes, explosives, paints
(b) Coal gas – Fuel
(c) Coke – Drinking purposes
(d) Ammoniacal liquor – Fertilizers
Answer: C

Question. 11. Which of the following is known as regenerated fibre ?
(a) Nylon – 66
(b) Terylene
(c) Nylon – 6
(d) Rayon
Answer: D

Question. 12. Which of the following is a thermosetting plastic ?
(a) PVC
(b) Polyethylene
(c) Bakelite
(d) Terylene
Answer: C

Question. 13. The monomer units of neoprene ar known as
(a) isoprene
(b) chloroprene
(c) vinyl chloride
(d) ethylene glycol.
Answer: B

Question. 14. The following are synthetic polymers except -
(a) teflon
(b) terylene
(c) nylon
(d) proteins
Answer: D

Question. 15. The structure of isoprene is -
(a) \( CH_2 = C(C_2H_5) – CH = CH_2 \)
(b) \( CH_2 = C(OCOCH) – CH = CH_2 \)
(c) \( CH_2 = C(CH_3) – CH = CH_2 \)
(d) \( CH_2 = CH – C \equiv CH \)
Answer: C

Question. 16. All are natural fibres except -
(a) silk
(b) cotton
(c) nylon
(d) wool
Answer: C

Question. 17. The first man – made polymer is -
(a) PVC
(b) Teflon
(c) Bakelite
(d) Nylon
Answer: D

Question. 18. Pick out the incorrect statement amongst the following :
(a) Nylon clothings can with stand high temperature & are therefore, good to wear in summers.
(b) Thermosetting plastics do not become soft on heating.
(c) Addition polymers are formed without the elimination of by- product molecules.
(d) Natural rubber is obtained as latex from rubber trees.
Answer: A

Question. 19. Which one of the following is a condensation polymer?
(a) Polyethene
(b) Polyester
(c) Polystyrene
(d) Polypropylene
Answer: B

Question. 20. Which one of the following polymers is not properly matched to its monomer ?
(a) Orlon – Acrylonirtile
(b) Synthetic rubber – 2 – Chlorobuta – 1, 3 – diene.
(c) Nylon – Adipic acid & Hexamethylene diamine
(d) Teflon – Vinyl chloride
Answer: D