5211. 90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
<0
Oct-30
250-280
500-600
✅ The correct answer is option B.
Chemical Engineering
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5212. Cumene (isopropyl benzene) is made by
Oxidation of napthalene
Propylene alkylation of benzene
Polymerisation of a mixture of benzene & propylene
None of these
✅ The correct answer is option B.
5213. Impurities present in brine is normally removed by treatment with
NH₃ and CO₂
Lime and soda ash
Lime, ammonia and carbon
All of the above
✅ The correct answer is option D.
5214. Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
7-14 and 14-30
7-14 and 40-50
14 – 30 and 40-50
10 – 20 and 40 – 50
✅ The correct answer is option A.
5215. Thermosetting materials
Are cross-linked molecules
Soften on application of heat
Are solvent soluble
None of these
✅ The correct answer is option A.
5216. At a given temperature, the equilibrium yield of SO₃ obtained from the oxidation of SO₂ is proportional to (where, P = pressure of the system )
P
√P
P²
1/P
✅ The correct answer is option B.
5217. Transparent soaps (e.g. Pears) are
Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
Metallic soaps with frothing agent and free stearic acid to achieve transparency
Metallic soaps with frothing agent from which glycerine has not been recovered
None of these
✅ The correct answer is option A.
5218. Polyvinyl chloride (PVC) is
A thermosetting material
A condensation polymerisation product
Made by employing emulsion polymerisation
None of these
✅ The correct answer is option C.
5219. Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
✅ The correct answer is option A.
5220. Starting material for the production of styrene butadiene rubber (SBR) is
Ethyl alcohol
Ethylene
Both A & B
Neither A nor B
✅ The correct answer is option C.