Engineering Questions with Answers - Multiple Choice Questions
Chemical Technology MCQ’s – C2 Compounds – Vinyl Acetate
What is the molecular weight of vinyl acetate?
Explanation: Chemical formula of vinyl acetate is CH3COOCH=CH2. It contains 4 carbon atoms, 6 hydrogen atoms, and 2 oxygen atoms with 12, 1, and 16 as their atomic weights respectively. Hence the molecular weight is 12*4+1*6+16*2 = 86.
Match the following?
I. Mono ethanol amine i. Pale Yellow oil
II. Di ethanol amine ii. Colorless crystals
III. Tri ethanol amine iii. Colorless viscous oil
a) I-iii, II-i, III-ii
b) I-iii, II-ii, III-i
c) I-i, II-ii, III-iii
d) I-ii, II-i, III-iii
Explanation: Appearance of mono, di, and tri ethanol amines are colorless viscous oil, colorless crystals, and pale yellow oil. All are soluble in water and alcohol.
Catalyst used in the oxyesterification process, raw materials being ethylene and oxygen is _______________
a) Platinum chloride
b) Antimony chloride
c) Palladium chloride
d) Gold (II) chloride
Explanation: New oxyesterification processes has only ethylene and oxygen as reactants and react in presence of palladium chloride to produce vinyl acetate and water.
Which is the most economical process for manufacturing acetaldehyde?
a) Hydration of acetylene
b) Hydration of acetic acid
c) Hydration of formic acid
d) Hydration of ethylene
Explanation: Hydration of ethylene is the most economical process as ethylene is cheaper than acetylene. Hence acetaldehyde is produced from ethylene and water using cupric chloride as catalyst.
Which of the following column is not observed in acetaldehyde manufacture?
Explanation: Acetaldehyde manufacturing process contains a compressor, reactor, cyclone separator, product separator, stripper, 2 pumps, regenerator, and cyclone separator.
Ammonolysis is an exothermic reaction.
Explanation: Ammonolysis is an exothermic reaction, so heat must be removed from the reactor in the production process of ethanol amines from ethylene oxide and ammonia (aqueous).
Tri ethanol amine is not available in the form of technical grade.
Explanation: Tri ethanol amine is available in technical grade with 80% purity (mono and di ethanol amines as impurities). 98% high purity grade is also available.