Which of the following is a constituent of coffee ?
A. Caffeine
B. Nicotine
C. Calgon
D. Lignin
Chemical Process
Dacron (or Terylene) fibres as compared to nylon fibres have__________________?
Dacron (or Terylene) fibres as compared to nylon fibres have__________________?
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All A , B. and C.
Common salt is generally not produced commonly by ________________ method from brine ?
Common salt is generally not produced commonly by ________________ method from brine ?
A. Freeze drying
B. Electrolytic
C. Solar evaporation
D. Vacuum evaporation
Flash point of most vegetable oils is about _______________ °C ?
Flash point of most vegetable oils is about _______________ °C ?
A. 50
B. 100
C. 200
D. 300
Most widely and commonly used coagulant for the removal of suspended impurities in water is __________________?
Most widely and commonly used coagulant for the removal of suspended impurities in water is __________________?
A. Bleaching powder
B. Slaked lime
C. Alum
D. Copper sulphate
The major constituent of black liquor generated during paper manufacture is sodium___________________?
The major constituent of black liquor generated during paper manufacture is sodium___________________?
A. Sulphate
B. Carbonate
C. Hydroxide
D. Bi-carbonate
Paper grade bamboo contains about _______________ percent cellulose ?
Paper grade bamboo contains about _______________ percent cellulose ?
A. 5
B. 20
C. 40
D. 60
Cement setting under water employs a/an _______________ process ?
Cement setting under water employs a/an _______________ process ?
A. Hydration
B. Decomposition
C. Oxidation
D. Reduction
Hydrogenation of vegetable oils is a/an _______________ reaction ?
Hydrogenation of vegetable oils is a/an _______________ reaction ?
A. Endothermic
B. Autocatalytic
C. Exothermic
D. Homogenous
Oxygen is produced by fractionation of air using _____________ process?
Oxygen is produced by fractionation of air using _____________ process?
A. Linde’s
B. Claude’s
C. Either A. or B.
D. None of these