Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is ______________ °C?
(A) 25
(B) 60-70
(C) 150-200
(D) 250-300
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to______________?
(A) Brighten the faint images
(B) Remove metallic silver
(C) Convert silver chloride to silver
(D) Remove unexposed silver halide
Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and___________________?
(A) Sulphuric acid
(B) Phosphoric acid
(C) Hydrochloric acid
(D) Hydrofluoric acid
Neoprene is chemically known as___________________?
(A) Polybutadiene
(B) Styrene butadiene rubber (SBR)
(C) Polyurethane
(D) Polychlorophrene
Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of_________________?
(A) Carbon
(B) Arsenic
(C) Lead
(D) Sulphur
Fermentator temperature during production of alcohol from molasses is around ______________ °C?
(A) 5
(B) 30
(C) 130
(D) 300
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
(A) Diaphragm electrolytic cell process
(B) Mercury electrolytic cell process
(C) Lime-soda process
(D) None of these
Raw materials used for producing ________________ cement does not contain iron oxide?
(A) Waterproof
(B) Slag
(C) White
(D) Pozzolan
Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove____________________?
(A) Colour
(B) Turbidity
(C) Bacteria
(D) All A ,
Alcohol is produced by the___________________?
(A) Oxidation of an aldehyde
(B) Hydrolysis of an ether
(C) Esterification of a fat
(D) None of these