Concentration of NaOH solution produced by diaphragm electrolytic cell is about _______________ percent?
(A) 10
(B) 25
(C) 50
(D) 98
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is ______________ percent?
(A) 10
(B) 50
(C) 80
(D) 95
CO & H2 are the constituents of___________________?
(A) Producer gas
(B) Water gas
(C) Coke oven gas
(D) All
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because___________________?
(A) SO3 gas is sparingly soluble in water
(B) Water forms an acid mist, which is difficult to absorb
(C) The purity of acid is affected
(D) Scale formation in the absorber is to be avoided
Teflon is___________________?
(A) Phenol formaldehyde
(B) An inorganic polymer
(C) Poly tetra-fluoro-ethylene (P.T.F.E.)
(D) A monomer
Nitric acid is not used in the manufacture of______________________?
(A) Detergents
(B) Fertilisers
(C) Aqua regia
(D) Explosives
Viscose rayon is__________________?
(A) Cellulose nitrate
(B) Regenerated cellulose nitrate
(C) Regenerated cellulose acetate
(D) None of these
Permanent hardness of water can be removed by___________________?
(A) Boiling
(B) Adding Ca(OH)2
(C) Boiling it with Na2CO3
(D) None of these
Celluloid is chemically___________________?
(A) Cellulose acetate
(B) Regenerated cellulose
(C) Cellulose nitrate
(D) Cellulose acetate butyrate