5511. Fusion of limestone and __________ produces high alumina cement.
Sand
Bauxite
Quicklime
Calcite
✅ The correct answer is option B.
Chemical Engineering
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5512. Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
SO₃
Cl₂
NH₃
SO₂
✅ The correct answer is option B.
5513. Hard water
Does not affect the lather formation by soap
Is not unfit for drinking purpose
Pollutes the water stream
All of the above
✅ The correct answer is option B.
5514. Which of the following is not produced on commercial scale from sea water?
Bromine
Magnesium compounds
Potassium compounds
Sodium sulphate
✅ The correct answer is option D.
5515. Black liquor is converted into white liquor by
Evaporation and burning the concentrate followed by causticisation of products
Multi-effect evaporation only
Selective liquid extraction
Extractive distillation
✅ The correct answer is option A.
5516. Pasteurisation of milk means
Removal of fatty and albuminous substance from it
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
Inhibiting the growth of micro-organisms without killing them
None of these
✅ The correct answer is option B.
5517. A mixture of chlorine & sodium bromide acts as a/an
Insecticides
Analgesic drug
Fire retardant
Hydrogenation catalyst
✅ The correct answer is option C.
5518. Hydrogenation of edible vegetable oils
Is an exothermic reaction
Increases their melting point
Is done in presence of nickel catalyst
All of the above
✅ The correct answer is option D.
5519. Process conditions in fermentator used for production of penicillin is
25°C, 2 atm
50°C, l0 atm
30°C, 200 mm Hg (absolute)
90°C, 45 atm
✅ The correct answer is option A.
5520. Neoprene is the trade name of
Polyurathane
Phenol formaldehyde
Polychloroprene
Styrene-butadiene rubber
✅ The correct answer is option C.