250+ TOP MCQs on C1 Compounds – Methanol and Answers

Chemical Technology Multiple Choice Questions on “C1 Compounds – Methanol”.

1. What is the molecular weight of methanol?
a) 32
b) 31
c) 28
d) 34

Answer: a
Clarification: Molecular formula of methane is CH₃OH. It has 3 Carbon atoms, 4 hydrogen atoms, and 1 oxygen atom; hence the molecular weight of methanol is 12*1+4*1+16*1=32.

2. Mercaptans are used in ____________
a) Freon’s
b) Cellophane
c) Paint stripper
d) Odorants

Answer: d
Clarification: Generally Mercaptans are used in odorants and soil fumigants. Carbon disulfide is used in cellophane. Methylene chloride is used in paint stripper and Freon’s.

3. Which of the following product is not produced in the side reactions of methanol formation?
a) Methane
b) Oxygen
c) Carbon dioxide
d) Water

Answer: b
Clarification: Side reaction products of catalytic hydrogenation of carbon monoxide to produce methanol are carbon dioxide, water, methane, and high molecular weight compounds.

4. What is the mole ratio of hydrogen to carbon dioxide in the process of catalytic hydrogenation of carbon monoxide?
a) 1.25
b) 2.25
c) 3.25
d) 4.25

Answer: b
Clarification: Mole ratio of hydrogen to carbon dioxide is 2.25. The presence of excess hydrogen is to prevent catalyst fouling with high molecular weight compounds that adsorbs on catalyst.

5. Catalytic hydrogenation of carbon monoxide process is similar to ammonia formation in design.
a) True
b) False

Answer: a
Clarification: The statement is true as both (exothermic reactions) have unfavorable equilibrium constants under normal pressure. Reactor must be made up of steel lined with copper to prevent iron carbonyl formation which poisons the catalyst.

6. Reagent used to remove ketones, aldehydes in liquid methanol is _______________
a) Manganate
b) Chromate
c) Di-chromate
d) Per-manganate

Answer: d
Clarification: Per-manganate is used to remove ketones, aldehydes from depressurized liquid methanol and light ends are removed by sending to stripper. High molecular weight compounds are separated by fractionation.