5001. Favourable conditions for the liquefaction of gases in general are
High pressure & low temperature
Low pressure & high temperature
High pressure & high temperature
Low pressure & low temperature
✅ The correct answer is option A.
Chemical Engineering
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5002. __________ is the major constituent of the Portland cement.
Calcium carbonate
Calcium oxide
Tricalcium silicate
Calcium sulphate
✅ The correct answer is option C.
5003. Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
✅ The correct answer is option D.
5004. The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
Redcar (U.K.)
Los-Angles (U.S.A.)
Trombay (India)
✅ The correct answer is option A.
5005. Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
1
2.5
5
10
✅ The correct answer is option B.
5006. Wet chlorine gas produced during electrolysis of brine is dehydrated by
Spraying 66° Be H₂SO₄ counter current to the flow of the gas
Passing it through a bed of diatomaceous earth
Passing it through a bed of silica gel
None of these
✅ The correct answer is option A.
5007. Plaster of Paris is
CaSO₄.½H₂O
Used for setting of broken bones
Both A and B
Same as gypsum
✅ The correct answer is option C.
5008. The purpose of adding Na₂CO₃ to water of low alkalinity is to
Permit the use of alum as a coagulant
Increase the softening capacity of zeolite
Facilitate easy regeneration of zeolite
All of the above
✅ The correct answer is option A.
5009. Free alkali in a toilet soap is __________ that in a laundary shop.
Less than
More than
Same
None of these
✅ The correct answer is option A.
5010. The most commonly used substance to speed up the sedimentation of sewage is
Lime
Sulphuric acid
Chlorine
Sodium bisulphite
✅ The correct answer is option A.