Q.1
Which of the following is not responsible for causing permanent hardness of water?
Q.2
__________ glass is used for the manufacture of optical glass.
Q.3
Caprolactum (a raw material for nylon-6 manufacture) is produced from
Q.4
In the manufacture of viscose rayon, the raw material used industrially is
Q.5
Bromine content in sea water may be around __________ ppm.
Q.6
Nickel is not used as a catalyst in the
Q.7
Plaster of Paris is
Q.8
Fourdrinier machine is used in the manufacture of
Q.9
Zeolite is used in the
Q.10
Chloral is used in the manufacture of
Q.11
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
Q.12
Alum is commercially produced from
Q.13
Which of the following is not an abrasive material ?
Q.14
Bromine is used in the preparation of
Q.15
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about
Q.16
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
Q.17
Mannheim furnace is used in the manufacture of
Q.18
Fourdrinier machine is used in the manufacture of
Q.19
Yeast is used in the manufacture of
Q.20
Which of the following is a constituent of vinegar?
Q.21
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
Q.22
Ethanol amine is produced using ammonia and
Q.23
Hydrocynic acid (HCN) is used as an insecticide for
Q.24
Sodium bisulphite is used for __________ water.
Q.25
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Q.26
A unit operation is exemplified by the process of
Q.27
Sucrose content in cane sugar may be around __________ percent.
Q.28
Percentage of alcohol in beer may be around __________ percent.
Q.29
Which of the following processes is absent in glass manufacturing process?
Q.30
A good quality coal should have
Q.31
Which of the following processes does not produce Cl₂ as a co-product during the manufacture of caustic soda?
Q.32
__________ acid is an unsaturated fatty acid.
Q.33
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
Q.34
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
Q.35
Which of the following is not produced commercially from sea water?
Q.36
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
Q.37
Which of the following is an ore of iron?
Q.38
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
Q.39
Aryl benzene sulphonate (ABS) is a
Q.40
The ideal pulp for the manufacture of paper should have high __________ content.
Q.41
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Q.42
Dacron (or terylene) fibres as compared to nylon's fibres have
Q.43
In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst
Q.44
Paper grade bamboo contains about __________ percent cellulose.
Q.45
Production of one ton of cement requires about __________ tons of limestone.
Q.46
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
Q.47
Oxygen is produced by fractionation of air using __________ process.
Q.48
A mixture of chlorine & sodium bromide acts as a/an
Q.49
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Q.50
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
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