Light & heavy leather respectively
Heavy & light leather respectively
Both light & heavy leather
Neither light nor heavy leather
✅ The correct answer is option A.
Chemical Process MCQs
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
Emulsification
Dispersion
Precipitation
Wetting
✅ The correct answer is option C.
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
Flocculate the impurities
Facilitate fast filtration
Both A and B
Neither A nor B
✅ The correct answer is option C.
For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison.
(i) platinum (ii) sulphur
(i) palladium (ii) oxygen
(i) nickel (ii) sulphur
(i) nickel (ii) oxygen
✅ The correct answer is option C.
Trinitro-toluene (TNT) is
Used in glycerine manufacture
An explosive
Used in dye manufacture
None of these
✅ The correct answer is option B.
Lime and soda ash are added to water to remove
Bicarbonates & sulphates of calcium and magnesium
Undersirable taste and odour
Bacteria
Its corrosiveness
✅ The correct answer is option A.
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
As a lubricant
As a rust preventive
In hard water for cleaning of cloth
As a foam depressant in distillation column
✅ The correct answer is option A.
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
12
22
0.3
✅ The correct answer is option A.
In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because
SO₃ gas is sparingly soluble in water
Water forms an acid mist, which is difficult to absorb
The purity of acid is affected
Scale formation in the absorber is to be avoided
✅ The correct answer is option B.
Teflon is
Phenol formaldehyde
An inorganic polymer
Poly tetrafluoroethylene (P.T.F.E.)
A monomer
✅ The correct answer is option C.