Wet chlorine gas produced during electrolysis of brine is dehydrated by__________________?
(A) Spraying 66° Be H2SO4 counter current to the flow of the gas
(B) Passing it through a bed of diatomaceous earth
(C) Passing it through a bed of silica gel
(D) None of these
Commercial production of soda ash by Solvay process requires limestone, ___________________ as raw materials?
(A) Coke and sand
(B) Brine and coal
(C) Coke and caustic soda
(D) None of these
____________________ is a thermosetting plastic ?
(A) Polythene
(B) Epoxy polymer
(C) P.V.C.
(D) Polystyrene
Zeolite is used in the ____________________ ?
(A) Water treatment
(B) Glass manufacture
(C) Hydrogenation of fatty oil as a catalyst
(D) Development of exposed photographic plate
The end bleaching agent used to move last traces of colour bodies from the pulp is ____________________?
(A) Chlorine dioxide (ClO2)
(B) MgO
(C) SO2 gas
(D) Mercaptans
Manufacture of phthalic anhydride uses ______________ as a catalyst ?
(A) Ni
(B) Cr
(C) V2O5
(D) Al2O3
Nylon-6 is manufactured from ______________________ ?
(A) Caprolactam
(B) Hexamethylene diamine and adipic acid
(C) Hexamethylene diamine and Maleic anhydride
(D) Hexamethylene diamine and Sebacic acid
Temporary hardness of water can be removed by__________________?
(A) Addition of alum (a coagulant)
(B) Boiling
(C) Filtration (through gravity sand filter)
(D) Addition of lime