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Petrochemicals

Petrochemicals and petroleum refining processes for GATE preparation

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following type of crude oil are generally rich in semi-solid waxes?

  1. Paraffinic-base type crude
  2. Asphaltic-base type crude
  3. Mixed base type crude
  1. Only 1
  2. Only 2
  3. Only 3
  4. Only 1 and 2
  5. Only 2 and 3
Question 2 Multiple Choice (Single Answer)

Advantages of LPG over gasoline as a motor fuel are
a. It is cheaper than gasoline.
b. It is highly knock resistant.
c. Its octane number is quite high and the load sensitivity is very low.
d. Residue and oil contamination is small, as it burns cleanly.

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

Which of the following statements is correct?

  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 180-250oC.
  1. Only 1
  2. Only 2
  3. Only 2 and 3
  4. Only 3
  5. Only 3 and 4
Question 5 Multiple Choice (Single Answer)

Which of the following statements is correct?

  1. Gasoline or petrol is obtained between 40-120oC during fractional distillation of crude oil.
  2. In fractional distillation of petroleum, higher boiling fractions condense first; while the lower boiling fractions turn by turn.
  3. Naphtha is used as solvent and in dry cleaning.
  1. Only 1
  2. Only 2
  3. Only 1 and 2
  4. Only 2 and 3
  5. Only 1, 2 and 3
Question 6 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
  2. Only b
  3. Only a and c
  4. Only a and b
  5. Only b and c
Question 7 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
  5. Glycerol, Cyclohexane, Vinyl chloride
Question 8 Multiple Choice (Single Answer)

Which of the following sets represent only third generation petrochemicals?

  1. Polythene, PVC, Nylon 66
  2. Polythene, PVC, Nylon 11
  3. DDT, Natural rubber, Nylon 66
  4. Polythene, PVC, DDT
  5. Cellulose, Nylon 66, Polythene
Question 9 Multiple Choice (Single Answer)

Which of the following is incorrectly matched?

  1. Doctor’s process : industrial chemical process for removing sulfur compounds from sour gasoline
  2. Cottrell’s process : process of obtaining petroleum ether from crude oil
  3. Dubb’s process : advanced thermal cracking process
  1. Only 1
  2. Only 2
  3. Only 3
  4. Only 1 and 2
  5. Only 1, 2 and 3
Question 10 Multiple Choice (Single Answer)

Which of the following compounds possess highest octane number and highest cetane number respectively?

  1. Isooctane and n-octane
  2. Isooctane and n-octane
  3. Isooctane and n-hexadecane
  4. n-heptane and n-hexadecane
  5. Isooctane and n-hexadecane
Question 11 Multiple Choice (Single Answer)

Which of the following statements is not correct about the process of 'cracking' in the petrochemical industry?

  1. It requires high temperature.
  2. In catalytic cracking much lower pressure is required than thermal cracking.
  3. It converts small hydrocarbons to more useful bigger hydrocarbons.
  4. Petrol obtained from vapour phase cracking has better anti-knock properties than petrol from liquid phase cracking.
  1. Only 1
  2. Only 1 and 2
  3. Only 2 and 3
  4. Only 3
  5. Only 3 and 4
Question 12 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.
  1. Only 1 and 2
  2. Only 2 and 3
  3. Only 3
  4. Only 3 and 4
  5. Only 4
Question 13 Multiple Choice (Single Answer)

Consider the following crude fraction: uses combination
Crude fraction 
        </strong>|<strong>Uses</strong>|

|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|

  1. Only i and iii
  2. Only i, ii and iii
  3. Only ii, iii and iv
  4. Only i, iii and iv
  5. Only i, ii and iv
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