Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Synol and Isosynthesis Processes
1 - Question
How many reactors does the slurry system has?
a) One
b) Two
c) Three
d) Four
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Explanation: The slurry system, has two reactors one used for the Oxo step and the other for hydrogenation steps.
2 - Question
Copper chromite catalyst can be used for dehydrogenation step.
a) True
b) False
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Explanation: An alternative method of hydrogenation uses a copper chromite catalyst. In this case, metallic cobalt is removed from the crude product before hydrogenation.
3 - Question
Fill in the blank: The Oxo process has provided a new source of high boiling _______ alcohols.
a) Aromatic
b) Amide
c) Aliphatic
d) None of the mentioned
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Explanation: The Oxo process has provided a new source of high boiling aliphatic alcohols.
4 - Question
What is the use of Isooctyl alcohol?
a) Paint driers
b) Surface-active agent
c) Paint driers & Surface-active agent
d) None of the mentioned
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Explanation: Derivatives of isooctyl alcohol such as isooctanoic acid and isooctylamine are used in manufacturing paint driers and as surface-active agents.
5 - Question
Which type of alcohols are used as intermediates for preparing plasticizers?
a) Low molecular weight
b) High molecular weight
c) No effect of molecular weight
d) None of the mentioned
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Explanation: The high-molecular-weight alcohols are used as intermediates for preparing surface-active agents and plasticizers.
6 - Question
Isosynthesis are designed to produce what?
a) Oxygenated material
b) Hydrogenated material
c) Both oxygenated and hydrogenated material
d) None of the mentioned
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Explanation: The isosynthesis are designed to produce high yields of oxygenated materials. The isosynthesis yields highly branched aliphatic hydrocarbons and aromatics.
7 - Question
The isosynthesis only yields highly branched aliphatic hydrocarbons.
a) True
b) False
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Explanation: The isosynthesis yields both highly branched aliphatic hydrocarbons and aromatics.
8 - Question
Why is it difficult to separate mixtures of oxygenates, paraffinic and olefinic hydrocarbons?
a) Temperature
b) Pressure
c) Azeotrope formation
d) Isotrope formation
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Explanation: The complexity of separating the mixtures of oxygenates and paraffinic and olefinic hydrocarbons. Fractionation alone may not be sufficient, because of overlapping boiling points and formation of azeotropes between oxygenates and hydrocarbons.
9 - Question
The SynoI process utilizes what ratio of gas recycle?
a) Low
b) Moderate
c) High
d) None of the mentioned
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Explanation: The SynoI process utilizes a high ratio of gas recycle, and because the products are carried out of the reactor rapidly, the high-molecular-weight alcohols are not dehydrated.
10 - Question
What type of products is synthesised over iron nitride?
a) High molecular weight
b) Low molecular weight
c) Both high and low molecular weight
d) None of the mentioned
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Explanation: The products from the synthesis over iron nitride are predominantly of low molecular weight.