Which of the following is an endothermic reaction ?
(A) Absorption of SO3 in 98% H2SO4
(B) C + H2O = CO + H2
(C) Thermal dissociation of iron pyrites
(D) Both
Hydrogenation of edible vegetable oils_________________?
(A) Is an exothermic reaction
(B) Increases their melting point
(C) Is done in presence of nickel catalyst
(D) All A ,
Pick out the wrong statement. Iodine value of an oil or fat is________________?
(A) The number of grams of iodine taken up by 100 gm of oil or fat
(B) A measure of its unsaturation
(C) Helpful in findings its adulteration & its suitability for making soap
(D) Independent of the type of oil, whether it is drying or non-drying
______________ process is used for the manufacture of sodium carbonate by ammonia soda process?
(A) Ostwald’s
(B) Bosch
(C) Solvay
(D) Haber’s
Neoprene is the trade name of___________________?
(A) Polyurethane
(B) Phenol formaldehyde
(C) Polychlorophrene
(D) Styrene-butadiene rubber
Claude process of gas liquefaction employs___________________?
(A) Merely compression of gas beyond its critical pressure
(B) Joule-Thomson expansion cooling
(C) Heat exchange with colder stream
(D) Adiabatic expansion against a piston or in a turbine
Cumene (isopropyl benzene) is made by ____________________?
(A) Oxidation of naphthalene
(B) Propylene alkylation of benzene
(C) Polymerisation of a mixture of benzene & propylene
(D) None of these
Setting of plaster of Paris is accompanied with___________________?
(A) Hydration
(B) Dehydration
(C) Hydrolysis
(D) Loss of CO2
Vanillin is a type of____________________?
(A) Anti-pyretic drug
(B) Food preservative
(C) Flavour
(D) Dye