181. Phthalic anhydride is used
In making PVC
As plasticisers
In insecticides manufacture
For making nylon-6
✅ The correct answer is option B.
Chemical Process MCQs
182. P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
Bakelite
Neoprene
Teflon
Nylon-66
✅ The correct answer is option C.
184. Main product in calcium carbide-water reaction is
Ca(OH)₂
C₂H₂
CO₂
CaCO₃
✅ The correct answer is option B.
185. Alkylbenzene sulfonate (ABS) is a
Detergent
Rubber
Pesticide
Polyester
✅ The correct answer is option A.
186. Raw materials used for producing __________ cement does not contain iron oxide.
Waterproof
Slag
White
Pozzolan
✅ The correct answer is option C.
187. Carboxymethyl cellulose (CMC) is added in detergents to
Prevent redeposition of soil on cleaned surface
Act as optical brightening agent
Inhibit corrosion in washing machines made of aluminium
None of these
✅ The correct answer is option A.
188. Presence of H₂S in raw water (to be chlorinated) results in the
Reduced softening capacity of zeolite
Increased dosage of chlorine to provide a disinfecting residual in the water
Easy removal of its hardness
None of these
✅ The correct answer is option B.
189. Salt cake is chemically represented by
Na₂SO₄
CaSO₄.1/2 H₂O
MgSO₄
BaSO₄
✅ The correct answer is option A.
190. Pick out the wrong statement pertaining to the soap manufacture.
Transparent soaps are made by cold process
Organic pigments are used as colouring materials in the soap manufacture
Both laundary as well as toilet soaps are manufactured by hot process
Colourless rosin is used in the manufacture of laundary soaps
✅ The correct answer is option A.