Nylon is obtained by heating___________________?
(A) Acrylic acid
(B) Epichlorohydrin
(C) Vinyl chloride
(D) Adipic acid with hexamethylene diamine
Carbohydrates are polyhydroxy compounds of___________________?
(A) Glucose
(B) Glyceraldehydes
(C) Oligosaccharides
(D) Aldehydes and ketones
Polyester resins are the product of the reaction of__________________?
(A) Dihydric alcohol and dicarboxylic aromatic acids
(B) Polyamines with aliphatic dicarboxylic acids
(C) Styrene in the presence of catalyst
(D) Epichlorohydrin with diphenylol propane
A polymer in which three different monomers combine called_____________?
(A) Copolymer
(B) Terpolymer
(C) Homopolymer
(D) Biopolymer
Calcarious material includes_________________?
(A) lime stone
(B) marble
(C) chalk
(D) all of the above
DAP (Diammonium hydrogen phosphate) contains ______________ plant nutrients?
(A) 60%
(B) 65%
(C) 70%
(D) 75%
The cooling of molten urea by air in the tower is called______________________?
(A) prilling
(B) evaporation
(C) condensation
(D) crystallization
Addition of urea to the soil is ____________ reaction?
(A) endothermic
(B) exothermic
(C) both a and b
(D) no heat energy is involved
The fertilizers which provide single nutrient from NPK are called ___________ fertilizer?
(A) straight
(B) compound
(C) both a and b
(D) none of the above
The fertility of the soil is improved by________________?
(A) Rotation of the crops
(B) Adding lime to the acid salts
(C) Adding manure and growing legumes
(D) All