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.Management Sciences
Category: Chemical Process
Salt cake is chemically represented by_________________?
A. Na2SO4
B. CaSO4. ½H2O
C. MgSO4
D. BaSO4
Permanent hardness of water can be removed by____________________?
A. Simply boiling
B. Adding alum
C. Passing it through cation & anion exchangers
D. All (A), B. and (C)
Which of the following is a constituent of vinegar ?
A. Around 10% alcohol
B. Around 1% acetic acid
C. Both A. and B.
D. Neither A. nor B.
Refractory bricks burnt at very high temperature have got______________?
A. Greater resistance to corrosion by slags
B. Less resistance to corrosion by slags
C. High spalling tendency
D. None of these
Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?
A. Decreases with decrease of thickness of the flakes
B. Increases with the increasing flake size keeping the flake thickness constant
C. Increases considerably with the rise of temperature
D. Decreases as the moisture content of flakes increases
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically____________________?
A. Cyclo trimethylene trinitramine
B. Trinitro resorcinol
C. Cyclo tetramethylene tetranitramine
D. Trinitrobenzene
Massecuite is ___________________?
A. Used for paper making
B. Used as a cattle feed
C. Highly acidic in nature
D. None of these
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
A bio-catalyst produced by living cells which acts independent of the cell is called a/an_______________?
A. Substrate
B. Enzyme
C. Nutrient
D. None of these
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
A. Diaphragm electrolytic cell process
B. Mercury electrolytic cell process
C. Lime-soda process
D. None of these
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