5091. Acrylonitrile is mainly used in the __________ industry.
Polymer
Printing
Dyeing
Photographic
✅ The correct answer is option C.
Chemical Engineering
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5092. Fusel oil is a/an
Essential oil
Extract from medicinal herbs
Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses)
None of these
✅ The correct answer is option C.
5093. Percentage of glycerene present in the spent lye obtained during soap manufacture is about
0.5
5
20
35
✅ The correct answer is option B.
5094. Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
Mechanical
Sulphate/kraft
Sulphite
Neutral sulphite semi-chemical
✅ The correct answer is option D.
5095. Soap cannot be used with hard water, because
Hard water contains sulphate
They form insoluble calcium soaps which precipitate
They attract back the removed dirt
None of these
✅ The correct answer is option B.
5096. Pick out the false statement pertaining to water treatment.
Aeration of water is effective in CO₂ removal
The zeolite water softening process reduces the hardness of water by not more than 50%
Sodium sulphate or sodium carbonate do not cause hardness in water
Water with pH value less than 7, is acidic
✅ The correct answer is option B.
5097. The most economical pulp for the production of newsprint would be the __________ pulp.
Groundwood
Sulphate
Sulphite
Semichemical
✅ The correct answer is option A.
5098. The noble gas which occurs most abundantly in the atmosphere is
Helium
Neon
Krypton
Argon
✅ The correct answer is option D.
5099. Reaction of an alcohol with organic acid is called the __________ reaction.
Saponification
Esterification
Neutralisation
Acidification
✅ The correct answer is option B.