Hydrocyanic acid (HCN) is used as an insecticide for____________________?
(A) Controlling timber degradation by ants
(B) Controlling poultry lice
(C) Potato beetle
(D) Citrus fruits
Penicillin is separated from fermented broth by ____________________?
(A) Extraction with amyl or butyl acetate
(B) Ternary Azeotropic distillation
(C) Evaporator in calandria
(D) Extractive distillation
Carbon disulphide is mainly used in the production of______________________?
(A) Viscose rayon
(B) Corundum
(C) Plasticiser for unsaturated polyester
(D) Paints
The manufacture of Kraft pulp is done by a/an _________________ process?
(A) Alkaline
(B) Acidic
(C) Neutral
(D) None of these
Flux addition during smelting of ore is done to___________________?
(A) Remove impurities/gangue
(B) Enhance rate of reaction
(C) Accelerate reduction of ore
(D) Separate slag from metal
Yellow glycerine is made into white, using____________________?
(A) Activated carbon
(B) Diatomaceous earth
(C) Bauxite
(D) Bentonite
Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass?
(A) Chromium
(B) Arsenic
(C) Copper
(D) Manganese
Commercially ethylene is produced from naphtha by ______________________?
(A) Catalytic cracking
(B) Catalytic dehydrogenation
(C) Pyrolysis
(D) Hydrocracking
Hydrolysis of sugar is called_____________________?
(A) Hydration
(B) Inversion
(C) Esterification
(D) None of these
Pick out the wrong statement?
(A) Processing of thermosetting plastics is ideally done by injection moulding
(B) Processing of thermoplastics is ideally done by compression moulding
(C) Mass production of seamless pipes are done by electrical resistance welding (ERW)
(D) Stretch forming is a process of cold drawing