8th Class Science Coal and Petroleum Question Bank

done Coal and Petroleum

• question_answer1) Which of the following statements are correct?

  (I) Coal, petroleum and natural gas are called fossil fuels.

  (II) Coal and natural gas are exhaustible substances.

  (III) CNG is more polluting than petrol.

  (IV) Coke is used in the manufacture of steel.

  A) I and II only done clear

  B) II and IV only done clear

  C) I, III and IV only done clear

  D) I, II and IV only done clear

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• question_answer2) When air is passed through red hot coke, a gaseous fuel is produced. The name of this gaseous fuel and its composition are respectively

  A) Natural gas, \[\text{CO+}{{\text{H}}_{2}}\] done clear

  B) Producer gas, \[{{\text{N}}_{\text{2}}}\text{+CO}\] done clear

  C) Water gas, \[{{\text{H}}_{\text{2}}}\text{+CO}\] done clear

  D) None of these. done clear

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• question_answer3) Destructive distillation of coal is carried out by heating coal strongly to \[\text{1000 }\!\!{}^\circ\!\!\text{ C}\] in the absence of air. The various useful products obtained are

  A) Crude oil, kerosene, naphtha and heavy oil done clear

  B) Coke, coal gas, coal tar and ammonium compounds done clear

  C) Coal gas, petroleum gas and lignite done clear

  D) None of these. done clear

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• question_answer4) Few statements are given below. Identify the incorrect statements and mark the appropriate option.

  (i) in fractional distillation of petroleum, hydrocarbon with lowest boiling point condenses first.

  (ii) Useful substances obtained from petroleum and natural gas are termed as 'Petrochemicals'.

  (iii) Coke is used in the extraction of many metals.

  (iv) Paraffin wax used in candles, vaseline, grease, polish is obtained by destructive distillation of coal.

  A) (i) and (ii) done clear

  B) (i) and (iv) done clear

  C) (i), (ii) and (iii) done clear

  D) (ii) and (iv) done clear

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• question_answer5) In the oil wells, X forms the topmost layer, followed by Y and finally Z. X, Y and Z are respectively

  A) Natural gas, oil and water done clear

  B) Petroleum gas, oil and natural gas done clear

  C) Natural gas, water and oil done clear

  D) Petroleum gas, oil and water. done clear

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• question_answer6) Read the given passage and fill in the blanks by choosing an appropriate option. The process of conversion of wood into coal is called i . There are three main varieties of coal which vary in their carbon content. ii has upto 96 per cent of carbon, iii has about 65 per cent carbon while iv has about 38 per cent carbon.

  A)

  (i)	(ii)	(iii)	(iv)
  Destructive distillation	Lignite	Anthracite	Bituminous coal

  done clear

  B)

  (i)	(ii)	(iii)	(iv)
  Carbonisation	Anthracite	Lignite	Bituminous coal

  done clear

  C)

  (i)	(ii)	(iii)	(iv)
  Carbonisation	Anthracite	Bituminous coal	Lignite

  done clear

  D)

  (i)	(ii)	(iii)	(iv)
  Destructive distillation	Bituminous coal	Anthracite	Lignite

  done clear
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• question_answer7) In fractionating column, various fractions are obtained at various heights of the column. As the vapours reach at a height where temperature is equal to or just below the boiling point of that fraction, it will

  A) Condense to form a liquid done clear

  B) Remain in gaseous state done clear

  C) Condense to form a solid done clear

  D) Escape from the column. done clear

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• question_answer8) Select the incorrect statements among the following:

  (i) Bitumen is used for metalling the roads.

  (ii) Some inexhaustible natural resources like coal, petroleum and natural gas formed from the dead remains of living organisms are known as fossil fuels.

  (iii) Many useful substances are obtained from coal (commercial importance), so it is also called as 'Black gold'.

  (iv) Natural gas is used as a starting material for the manufacture of a number of chemicals and fertilisers.

  A) (i) and (ii) only done clear

  B) (ii) and (iii) only done clear

  C) (ii) and (iv) only done clear

  D) (i), (ii) and (iv) only done clear

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• question_answer9) Which of the following represents the correct decreasing order of boiling points of the given liquids.

  A) Paraffin wax > Diesel > Kerosene > Petrol done clear

  B) Diesel > Kerosene > Petrol > Paraffin wax done clear

  C) Kerosene > Petrol > Paraffin wax > Diesel done clear

  D) Petrol > Paraffin wax > Diesel > Kerosene done clear

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• question_answer10) Different components of petroleum are separated by fractional distillation. What is the correct sequence of fractions obtained in the fractionating column from top to bottom?

  A) Petroleum gas, lubricating oil, kerosene, gasoline. done clear

  B) Kerosene, petroleum gas, lubricating oil, gasoline. done clear

  C) Petroleum gas, gasoline, kerosene, lubricating oil. done clear

  D) Gasoline, kerosene, petroleum gas, lubricating oil. done clear

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• question_answer11) Coal tar can be used as a starting material for manufacturing

  (i) Drugs

  (ii) Photographic materials

  (iii) Cookwares

  (iv) Explosives

  A) Only (i) done clear

  B) (ii) and (iv) done clear

  C) (i), (ii) and (iv) done clear

  D) (ii), (iii) and (iv) done clear

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• question_answer12) Read the following statements carefully.

  X: It is a fossil fuel used in thermal power plants to produce electricity.

  Y: It is a porous, black and almost pure form of carbon.

  Z: It is a mixture of about 200 substances. X, Y and Z are respectively

  A) Petroleum, coal gas, coke done clear

  B) Coal, coke, coal tar done clear

  C) CNG, bitumen, diesel done clear

  D) Coal gas, petrol, paraffin wax. done clear

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• question_answer13) One word answers are given for a few statements. Mark the answer which is not correct.

  A) Resources which will either never run out or are replaced within a reasonable period of time ? Renewable resources. done clear

  B) Wise and careful use of resources by not wasting them - Conservation. done clear

  C) Conversion of wood into coal over million of years due to high temperature and pressure under the earth - Carbonisation. done clear

  D) A black, viscous liquid extracted from the rocks which is a source of hydrocarbons - Coal tar. done clear

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• question_answer14) Which of the following represents an incorrect match?

  A) Coal gas - Methane + Hydrogen done clear

  B) LPG - Propane + Butane done clear

  C) Producer gas - Carbon + Nitrogen done clear

  D) CNG - Compressed methane done clear

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• question_answer15) Read the given statements and select the correct option.

  Statement 1: Petrol condenses near the top of the fractionating column while diesel oil near the middle of the column.

  Statement 2: Petrol is more volatile than diesel oil.

  A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear

  B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear

  C) Statement 1 is true and statement 2 is false. done clear

  D) Both statements 1 and 2 are false. done clear

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• question_answer16) Observe the figure of destructive distillation of coal. What are the three fractions X, Y and Z?

  A)

  X	Y	Z
  Coal gas	Coal tar	Coke

  done clear

  B)

  X	Y	Z
  Coal gas	Coke	Coal

  done clear

  C)

  X	Y	Z
  Coal gas	Coal tar	Impure coal

  done clear

  D)

  X	Y	Z
  Carbon dioxide	Coal tar	Coal

  done clear
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• question_answer17) Match column I with column II and choose the correct option from the codes given below.

  Column I (Amorphous forms of carbon)	Column II (Uses)
  (P) Lamp black	(i) For making electrodes for dry cell.
  (Q) Bone Charcoal	(ii) In gas masks
  (R) Wood charcoal	(iii) In extraction of metals
  (S) gas carbon	(iv) To remove colour from sugarcane juice
  (T) Coke	(v) For making black shoe polish

  A)

  P-(i)

  Q-(v)

  R-(iii)

  S-(ii)

  T-(iv)

  done clear

  B)

  P-(v)

  Q-(iv)

  R-(ii)

  S-(iii)

  T-(i)

  done clear

  C)

  P-(ii)

  Q-(iii)

  R-(iv)

  S-(i)

  T-(v)

  done clear

  D)

  P-(v)

  Q-(iv)

  R-(ii)

  S-(i)

  T-(iii)

  done clear
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• question_answer18) Study the given flowchart carefully. Which of the following statements is correct?

  A) X can be condensed back to coal. done clear

  B) Y and Z are useless products. done clear

  C) Z starts burning when exposed to air. done clear

  D) None of these done clear

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• question_answer19) The given figure shows the petroleum deposit inside the earth's crust. Which of the following is correct with respect to substance X?

  I. X is chiefly made up of methane.

  II. X is stored under low pressure.

  III. X is a clean, non-polluting fuel.

  A) I and III done clear

  B) II and III done clear

  C) I and II done clear

  D) None of these done clear

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• question_answer20) Fill in the blanks left in the classification of the fossil fuels.

  A)

  p	q	u	v	w	x
  Petroleum	Coal	Petroleum gas	Bitumen	Coal gas	Coke

  done clear

  B)

  p	q	u	v	w	x
  Coal	Petroleum	Coal gas	Coke	Petroleum gas	Bitumen

  done clear

  C)

  p	q	u	v	w	x
  Coal	Petroleum gas	Coal	Charcoal	Gasoline	Coal tar

  done clear

  D)

  p	q	u	v	w	x
  Petroleum	Coal	Gasoline	Bitumen	Natural gas	Coke

  done clear
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