chem process (sec 2-5) Flashcards
Calgon used in water treatment is chemically
sodium hexametaphosphate
Which oil is preferred for paint manufacture ?
drying oil
Styrene butadiene rubber (SBR) is
synthetic polymer
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
5 atm, 275°C
Glycerine is not used in the
none of these fucker hahahahahah
Cumene is the starting material for the production of
phenol and acetone
The type of high refractive index glass used in optical instruments is __________ glass.
flint
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
vanadium
Most commonly used rubber vulcanising agent is
sulphut
Terylene is
both a & b, dacron and polyester
Free alkali in a toilet soap is __________ that in a laundary shop.
less than
Dehydrogenation of isopropanol produces
acetone
Pick out the wrong statement.
A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
B) Soap powder is prepared by mixing soap with hydrated sodium carbonate.
C) Detergents differ from soaps in their action in hard water.
D) Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.
D
Concentration of hydrogen peroxide is done by
vacuum crystallization
Helium is produced on commercial scale from
natural gas
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20-30
The catalyst used in the manufacture of DDT is
20% oleum
Most widely and commonly used coagulant for the removal of suspended impurities in water is
alum
__________ is used as a catalyst in fat splitting.
ZnO
Which of the following is not produced on commercial scale from sea water?
sodium sulphate
Heating of __________ to 120°C, produces plaster of paris.
gypsum
Pick out the wrong statement.
A. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%.
B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide.
C. Vitriol oil is nothing but technical sulphuric acid.
D. Decomposition of sulphuric acid on heating does not start before its boiling.
D
Which of the following has sodium bicarbonate as its main constituent ?
baking powder