Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about _____________ percent?
(A) 75
(B) < 10
(C) > 30
(D) 50
Kopper-Totzek coal gasifier_________________?
(A) Can give ammonia synthesis gas (H2 + N2)
(B) Is a moving bed reactor
(C) Cannot use coking coal
(D) Operate at very high pressure
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an___________________?
(A) Surfactant
(B) Builder
(C) Optical brightening agent
(D) Anti soil redeposition agent
Lindane is____________________?
(A) Not a fumigant
(B) BHC (Benzene Hexachloride) containing 99% γ-isomer
(C) A by-product of BHC manufacture
(D) Both
Which of the following is the main constituent of the mother liquor produced in salt industry ?
(A) Quick lime
(B) Glauber’s salt
(C) Salt petre
(D) Bromine
______________ paper is used in the manufacture of newsprint paper ?
(A) Ground-wood
(B) Board
(C) Tissue
(D) Wrapping
Pick out the exothermic reaction out of the following ?
(A) C + H2O = CO + H2
(B) CaC2 + H2O = Ca(OH)2 + C2H2
(C) MgCO3 = MgO + CO2
(D) All (A),
Which of the following, when pyrolysed, produces Perchloroethylene ?
(A) Ethylene dichloride
(B) Chlorobenzene
(C) Carbon tetrachloride
(D) Chlorinated paraffin
Magnesium and calcium ______________ cause temporary hardness of water ?
(A) Carbonates
(B) Bicarbonates
(C) Phosphates
(D) Sulphates