FeO.TiO₂
Ca SO₄ . 2H₂O
Fe₄ [Fe (CN₆)₃]
AlF₃ . 3NaF
✅ The correct answer is option C.
Chemical Engineering MCQs
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
Inhibits its corrosive effects
Does not allow redeposition of dirt on the cleaned surface
None of these
✅ The correct answer is option A.
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
Fertiliser manufacture
Car battery solution
Synthesis of oleum
Water treatment
✅ The correct answer is option B.
Coke oven gas consists mainly of
H₂, & CH₄
CO, & CO₂
H₂, & CO
CH₄, & CO
✅ The correct answer is option A.
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
Cutting
Fibrillation
Hydration
Strengthening
✅ The correct answer is option D.
Fermentation is adversely affected by the
Presence of air
Absence of air
High concentration
Presence of ammonium salts
✅ The correct answer is option C.
Which is the most suitable dye for synthetic fibres?
Acid dye
Azoic dye
Pigment dye
Mordant dye
✅ The correct answer is option A.
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Ammonium chloride
Sodium carbonate
Sodium bi-carbonate
✅ The correct answer is option A.
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 – 30
< - 5
100 – 150
250 – 300
✅ The correct answer is option A.
Hydrazine is used in water treatment for the removal of
Colloidal impurities
Dissolved oxygen
Turbidity
Chlorinous taste
✅ The correct answer is option B.