191. 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.
Chemical Process MCQs
192. Sea water contains about __________ ppm of bromine.
5
70
500
1700
✅ The correct answer is option B.
193. 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.
194. 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.
195. 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.
196. In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 800 °C
10 atm., 170-180°C
1 atm., 170 – 180°C
L atm., 800°C
✅ The correct answer is option B.
197. Catalyst used in the oxidation of benzene to produce maleic anhydride is
V₂O₅
Pt
Ni
Cr
✅ The correct answer is option A.
198. Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
CaO
MnO₂
ZnO
FeS
✅ The correct answer is option C.
199. BHC (Benzene hexachloride) is made by the chlorination of benzene
Which is an addition reaction
Which is a substitution reaction
In absolute dark
In presence of sunlight
✅ The correct answer is option A.
200. Calgon used in water treatment is chemically
Sodium phosphate
Sodium hexametaphosphate
Calcium phosphate
Tricresyl phosphate
✅ The correct answer is option B.