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Petrochemicals - 2

Petrochemicals

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is incorrect?

  1. Gasoline or petrol is obtained between 40-120 oC during fractional distillation of crude oil.
  2. Nylon 11 is a third generation petrochemical.
  3. In fractional distillation of petroleum, higher boiling fractions condense first; while the lower boiling fractions turn by turn.
  4. Naphthalene is used as solvent and in dry cleaning.
Question 2 Multiple Choice (Single Answer)

Reforming is a process used for

  1. making synthetic petrol
  2. making low boiling hydrocarbons of lower molecular mass
  3. improving antiknock characteristics of fuel
  4. producing power alcohol
Question 3 Multiple Choice (Single Answer)

Which of the following is incorrectly matched?

  1. Doctor's process: Industrial chemical process for removing sulphur compounds from sour gasoline
  2. Cottrell's process: Process of obtaining petroleum ether from crude oil
  3. Dubb's process: Advanced thermal cracking process
  4. None of these
Question 4 Multiple Choice (Single Answer)

Identify the incorrect statement.

  1. Mixed base type crude is generally rich in semi-solid waxes.
  2. Petroleum ether is used as solvent.
  3. In fractional distillation of petroleum, lower boiling fractions condense first.
  4. In fractional distillation of petroleum, diesel oil fraction is obtained between 180-250 oC.
Question 5 Multiple Choice (Single Answer)

Which of the following SETS of second generation petrochemical can be derived from propylene?

  1. Acrolein, Vinyl chloride, Acrylonitrile
  2. Glycerol, Cyclohexane, Acrolein
  3. Glycerol, Acrolein, Vinyl chloride
  4. Acrolein, Glycerol, Acrylonitrile
Question 6 Multiple Choice (Single Answer)

Which of the following sets represents only third generation petrochemicals?

  1. Polythene, PVC, Nylon 11
  2. DDT, Natural rubber, Nylon 66
  3. Polythene, PVC, DDT
  4. Cellulose, Nylon 66, Polythene
Question 7 Multiple Choice (Single Answer)

Which of the following compounds possesses the highest octane number and the highest cetane number?

n-heptane, n-hexadecane, n-octane and isooctane

  1. isooctane and n-octane
  2. n-hexadecane and isooctane
  3. n-heptane and n-hexadecane
  4. Isooctane and n-hexadecane
Question 8 Multiple Choice (Single Answer)

Which of the following statements is FALSE about the process of 'cracking' in the petrochemical industry?

  1. It requires high temperature.
  2. It converts small hydrocarbons to more useful bigger hydrocarbons.
  3. In catalytic cracking, much lower pressure is required than thermal cracking.
  4. Petrol obtained from vapour phase cracking has better anti-knock properties than petrol from liquid phase cracking.
Question 9 Multiple Choice (Single Answer)

Which of the following types of crude oils is/are generally rich in semi-solid waxes?

  1. Paraffinic-base type crude
  2. Asphaltic-base type crude
  3. Mixed base type crude
  4. All the three are equally rich in semi solid waxes.
Question 10 Multiple Choice (Single Answer)

Which of the following catalysts are used in catalytic cracking?
(a) Silica-alumina
(b) Lithium aluminium hydride
(c) Zeolites
(d) Anhydrous aluminium chloride
(e) Aluminum hydrosilicate

  1. (a), (b), (c) and (d)
  2. (a), (c) and (e)
  3. (a), (c) and (d)
  4. (b), (c) and (e)
Question 11 Multiple Choice (Single Answer)

Which of the following pairs are incorrectly matched
Fractions obtained by distillation of crude Boiling range
I. Gasoline Below 30 oC
II. Kerosene oil 180-250 oC
III. Fuel oil 120-180 oC
IV. Heavy oil 320-400 oC
  1. I and II
  2. I and III
  3. II and III
  4. II and IV
Question 12 Multiple Choice (Single Answer)

Consider the following statements about natural gas.

  1. Natural gas is mainly composed of methane.
  2. When natural gas occurs along-with petroleum in oil wells, it is called wet gas.
  3. Natural Gas Liquids (NGLs) include methane, ethane, propane, n-butane, iso-butane, and natural gasoline.

Which of the statements is/are correct?

  1. 1 only
  2. 1 and 2 only
  3. 1 and 3 only
  4. All are correct
Question 13 Multiple Choice (Single Answer)

Which of the following statements is/are correct?
(a) Crude oil is a non-renewable energy resource.
(b) Crude oil and natural gas are generally found in metamorphic rocks.
(c) The fraction of crude oil containing a mixture of hydrocarbons such as decane to hexadecane is called kerosene oil.

  1. Only (a) and (b)
  2. Only (b) and (c)
  3. Only (a) and (c)
  4. All of these
Question 14 Multiple Choice (Single Answer)

Consider the following combinations
Crude fraction Uses
i. Naphtha As solvent and in dry cleaning.
ii. Asphalt As fuel and lubricant.
iii. Petroleum jelly As lubricant and in cosmetics and medicines
iv. Heavy oil For getting gasoline by cracking process

Which of the combinations are correct?

  1. i, ii and iii
  2. ii, iii and iv
  3. i, iii and iv
  4. i, ii and iv
Question 15 Multiple Choice (Single Answer)

Which of the following are advantages of LPG over gasoline as a motor fuel?
(a) It is cheaper than gasoline.
(b) It is highly knock resistant.
(c) Its octane number is quiet high and the load sensitivity is very low.
(d) Residue and oil contamination is small as it burns cleanly.

  1. (a), (b) and (c)
  2. (a), (b) and (d)
  3. (a), (c) and (d)
  4. All are correct
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