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.
Chemical Engineering MCQs
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.
Low temperature carbonisation of coal takes place at __________ °C.
300
1100
700
900
✅ The correct answer is option C.
Salt cake is chemically represented by
Na₂SO₄
CaSO₄.1/2 H₂O
MgSO₄
BaSO₄
✅ The correct answer is option A.
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.
20% oleum means that in 100 kg oleum, there are 20 kg of
SO₃ and 80kg of H₂SO₄
H₂SO₄ and 80kg of SO₃
SO₃ for each 100 kg of H₂SO₄
None of these
✅ The correct answer is option A.
Sea water contains about __________ ppm of bromine.
5
70
500
1700
✅ The correct answer is option B.
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?
Slag cement
Glasses
Porcelain/Potteries
Teflon
✅ The correct answer is option D.
Resistance to fusion of the refractory under a steady rising temperature condition is called
Spalling
Refractoriness
Both A & B
Neither A nor B
✅ The correct answer is option B.
Viscose rayon
Cannot be made from sulphite pulp
Utilises H₂SO₄, NaOH and CS₂ during its manufacture
Cannot yield textile grade fibre
None of these
✅ The correct answer is option B.