Chemical Process

Which of the following is not produced on commercial scale from sea water ? A. Bromine B. Magnesium compounds C. Potassium compoundsD. Sodium sulphate

Glycerine can be obtained from ________________ ? A. Fat B. Naphthalene C. Cumene D. Sucrose

Permanent hardness of water is due to the presence of calcium & magnesium __________________? A. Bi-carbonatesB. Sulphates & chlorides C. Carbonate D. None of these

Deaeration of water in its treatment is necessary, as it___________________? A. Minimises its turbidity B. Helps in controlling its taste and odourC. Minimises its corrosiveness D. None of these…

Use of water having dissolved oxygen in boilers promotes___________________? A. Corrosion B. Sequestration C. Scale formation D. None of these

Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces ________________? A. Nylon-6B. Dacron C. Polyester D. PVC

Sudden temperature fluctuation does not affect pyrex glass, because of its __________________? A. Low co-efficient of expansion B. High co-efficient of expansion C. High melting point D. Both B. and (C)…

Which of the following is a constituent of coffee ? A. Caffeine B. Nicotine C. Calgon D. Lignin

Dacron (or Terylene) fibres as compared to nylon fibres have__________________? A. Better heat & acid resistant properties B. Poorer resistance to alkalis C. Poorer dyeabilityD. All A , B. and C.…

Common salt is generally not produced commonly by ________________ method from brine ? A. Freeze drying B. Electrolytic C. Solar evaporation D. Vacuum evaporation