Naphthalene
Benzol
Ethyl alcohol
Phthalic anhydride
✅ The correct answer is option C.
Chemical Process MCQs
Reaction of calcium carbide with water produces a gas, which is used
As an illuminant
For metal cutting/welding
Both A & B
Neither A nor B
✅ The correct answer is option C.
Temporary hardness of water can be removed by
Addition of alum (a coagulant)
Boiling
Filtration (through gravity sand filter)
Addition of lime
✅ The correct answer is option B.
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?
Depithing
Digestion
Bleaching
None of these
✅ The correct answer is option A.
Production of one ton of cement requires about __________ tons of limestone.
0.6
1.2
2.2
3.8
✅ The correct answer is option B.
More than 100 percent of __________ is present in oleum.
SO₃
H₂SO₄
H₂SO₃
SO₂
✅ The correct answer is option B.
Which of the following is the main constituent of the mother liquor produced in salt industry?
Quick lime
Glauber’s salt
Salt petre
Bromine
✅ The correct answer is option D.
Coagulant is used __________ filtration.
Before
After
During
To avoid
✅ The correct answer is option A.
Main constituent of limestone is
CaCO₃
MgCO₃
Na₂CO₃
CaSO₄
✅ The correct answer is option A.
Na₂CO₃.10H₂O is called
Washing soda
Soda ash
Slaked lime
Quicklime
✅ The correct answer is option A.