section 4 Flashcards
Starting material for the production of styrene butadiene rubber (SBR) is
a. ethyl alcohol
b. ethylene
c. both (a) & (b)
d. neither (a) nor (b)
c
Which one of the following is not an elastomer?
a. Polyisoperene
b. Neoprene
c. Nitrile-butadiene
d. None of these
d
Which of the following processes can remove both temporary as well as permanent hardness of water?
a. Filtration
b. Boiling
c. Distillation
d. None of these
c
Dacron is a
a. condensation product of hexam-ethylene
diamine and adipic acid.
b. thermosetting material.
c. condensation product of dimethyl
terephthalate and ethylene glycol.
d. none of these.
d
Rancidity of the fatty oil can be reduced by its
a. decoloration
b. hydrogenation
c. oxidation
d purification
b
Platinum catalyst used in the earlier days of
sulphuric acid manufacture by contact process
suffers from the drawback like
a. high cost
b. fragile nature
c. easy poisoning tendency
d. all (a), (b) and (c)
d
__________ of rubber decreases after its
vulcanisation.
a. Resistance to the action of organic solvent
b. Tackiness
c. Maximum service temperature
d. Tensile strength
b
Boiling of water containing temporary hardness produces
a. CO2
b. CaSO4
c. CaHCO3
d. none of these
a
Starting material for the commercial production of ethyl alcohol in India is
a. rice
b. molasses
c. fruit of Mahua tree
d. Maize
b
Phenol formaldehyde
a. employs addition polymerisation.
b. employs condensation polymerisation.
c. is a monomer.
d. is an abrasive material.
b
Which of the following is not an insecticide?
a. Hydrocyanic acid
b. Nicotine
c. Sodium flouride
d. Hexane
d
Shrinkage volume in cement setting does not depend upon the
a. sand to cement ratio.
b. water to cement ratio.
c. ambient temperature fluctuation.
d. drying period.
a
Bisphenol A is produced by the condensation of acetone with
a. formaldehyde
b. ethyl alcohol
c. diethyl ether
d. Phenol
d
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
a. sodium sulphide & sodium carbonate.
b. sodium sulphite & sodium carbonate.
c. sodium sulphite & sodium sulphide.
d. none of these.
a
Presence of carbonaceous matter in the sewage
a. causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures.
b. reduces sulphate ions to sulphides causing obnoxious smell.
c. increases the quantity of chlorine used for its purification.
d. all (a), (b) and (c).
d
A mineral is termed as ‘ore’, if
a. a metal can be economically extracted from it.
b. it contains ≥ 40% metal.
c. the metal present in it is costly.
d. all (a), (b) and (c).
a
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
a. gives higher conversion efficiency.
b. has a longer life and is not poisoned by arsenic.
c. handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant.
d. all (a), (b) and (c).
d
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is
proportional to (where, P = pressure of the system)
a. P
b. Sqrt of P
c. P^2
d. 1/P
b
Oleum produces fumes of
a. SO2
b. H2SO4
c. SO3
d. SO2 + H2SO4
c
20% oleum means that in 100 kg oleum, there are 20 kg of
a. SO3 and 80kg of H2SO4.
b. H2SO4 and 80kg of SO3.
c. SO3 for each 100 kg of H2SO4.
d. none of these.
a