271. Washing soda is chemically represented by
Na₂CO₃
Na₂CO₃.H₂O
Na₂CO₃.10H₂O
NaHCO₃
✅ The correct answer is option C.
Chemical Process MCQs
272. Multistage catalytic converter is not used in the
Conversion of SO₂ to SO₃
NH₃ synthesis reaction
Both A & B
Neither A nor B
✅ The correct answer is option B.
273. Flexible foam (for mattresses) is usually made of
PVC
Silicone
Polyurethanes
Polyamides
✅ The correct answer is option C.
274. Systemic insecticides
Are absorbed throughout the plant
Kill insects following external bodily contact
Are stomach poisons
Emit poisonous vapour
✅ The correct answer is option A.
275. Blue vitriol is chemically
Copper sulphate
Ferrous sulphate
Copper nitrate
Aluminium sulphate
✅ The correct answer is option A.
276. A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
✅ The correct answer is option B.
277. __________ is a polysacchride.
Maltose
Starch
Sucrose
Glucose
✅ The correct answer is option B.
278. Epoxy resin
Is a good adhesive
Is an elastomer
Cannot be used for surface coatings
Is a polyester
✅ The correct answer is option A.
279. Nickel is not used as a catalyst in the __________ reaction.
Shift conversion
Oil hydrogenation
Steaming reforming of naphtha
Ammonia cracking/dissociation
✅ The correct answer is option A.
280. Varnish does not contain
Pigment
Thinner
Dryer
Anti-skimming agent
✅ The correct answer is option A.