Q.1
Highly porous refractory bricks are
Q.2
Wax is a
Q.3
Refractory bricks burnt at very high temperature have got
Q.4
Viscose rayon
Q.5
Varnish does not contain
Q.6
Varnish does not contain
Q.7
Roasting of metallurgical ores is done mainly to
Q.8
Lurgi coal gasifier is a pressurised __________ bed reactor.
Q.9
Manufacture of phthalic anhydride uses __________ as a catalyst.
Q.10
Viscose rayon is
Q.11
In the production of soda ash by Solvay process, the by-product is
Q.12

Process conditions in fermentator used for production of penicillin is

  • 25°C, 2 atm.
  • 50°C, l0 atm.
  • 30°C, 200 mm Hg (absolute).
  • 90°C, 45 atm.
Q.13

Cooking liquor in case of sulphite process is

  • sodium sulphite and sodium bisulphite.
  • magnesium sulphite and free SO2 in acid medium.
  • magnesium sulphate and magnessium bicarbonate.
  • none of these.
Q.14

Fermentator temperature during production of alcohol from molasses is around __________ °C.

  • 5
  • 30
  • 150
  • 300
Q.15

Molasses is the starting material for the production of

  • alcohol
  • essential oil
  • fatty acids
  • massecuite
Q.16

Polyvinyl chloride (PVC) is

  • a thermosetting material.
  • a condensation polymerisation product.
  • made by employing emulsion polymerisation.
  • none of these.
Q.17

Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of

  • carbon
  • arsenic
  • lead
  • sulphur
Q.18

of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.

  • <0
  • 10-30
  • 250-280
  • 500-600
Q.19

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

  • drying
  • semi-drying
  • non-drying
  • none of these
Q.20

Which of the following coals has the highest calorific value ?

  • Lignite
  • Sub-bituminous
  • Anthracite
  • Peat
Q.21

Which of the following is not an abrasive material ?

  • Bakelite
  • Pumice
  • Corundum
  • Carborundum
Q.22

BHC (Benzene hexachloride) is made by the chlorination of benzene

  • which is an addition reaction.
  • which is a substitution reaction.
  • in absolute dark.
  • in presence of sunlight.
Q.23

Diaphragm electrolytic cell as compared to mercury electrolytic cell

  • produces 70% NaOH solution.
  • requires less specific power consumption for the production of chlorine.
  • requires lesser investment for similar capacity.
  • all (a), (b) and (c).
Q.24

Bleaching of paper pulp is done with

  • activated clay
  • bromine
  • chlorine or chlorine dioxide
  • magnesium sulphite
Q.25

Pick out the wrong statement.

  • Kraft method of pulp manufacture can process all types of fibrous raw materials.
  • Digestion time for bagasse is less than that for wood base materials.
  • Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method.
  • none of these.
Q.26

Sodium chloride content in sea water is about __________ gms/litre.

  • 2
  • 10
  • 25
  • 50
Q.27

Fluorescent dyes are added in detergents to

  • act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.
  • attain distinctiveness from other brands.
  • act as tarnish inhibitor for metals like German silver.
  • none of these
Q.28

Fats as compared to oils have

  • more unsaturated glycerides of fatty acids.
  • less unsaturated glycerides of fatty acids.
  • much higher reactivity to oxygen.
  • lower melting point.
Q.29

Thermal pyrolysis of ethylene dichloride produces

  • trichloroethylene
  • vinyl chloride
  • ethanol amine
  • ethylene oxide
Q.30

Pick out the wrong statement.

  • Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate.
  • Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide.
  • Ordinary glass is represented chemically by Na2O . CaO . 6SiO2.
  • Red color is imparted to glass by addition of arsenic oxide.
Q.31

Calcareous & argillaceous materials are used in the manufacture of

  • lead
  • cement
  • carbon disulphide
  • none of these
Q.32

Isopropyl benzene produced by alkylation of benzene with propylene is known as

  • neoprene
  • cumene
  • gelatin
  • mercaptans
Q.33

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to

  • flocculate the impurities.
  • facilitate fast filtration.
  • both (a) and (b).
  • neither (a) nor (b).
Q.34

Finely ground calcium aluminate & silicate is a/an

  • cermet
  • cement
  • abrasive
  • explosive
Q.35

Pick out the wrong statement.

  • Azoic dyes are mostly applied on cotton fabrics.
  • Basic dyes (e.g. amino derivatives) are applied mostly to paper.
  • Mordant dyes are applied mainly to wools.
  • none of these.
Q.36

Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis.

  • i - Ni/Al2O3; ii - Cu - ZnO/Al2O3
  • i - Fe/Al2O3; ii - Cu - ZnO/Al2O3
  • i - Ni/Al2O3; ii - Fe/Al2O3
  • i - Fe/Al2O3; ii - Ni/Al2O3
Q.37

Commercial production of calcium carbide requires limestone and __________ as raw materials.

  • coke
  • sand
  • soda ash
  • fuel oil
Q.38

The main component of pyrex glass is

  • zinc
  • lead
  • boron
  • celenium
Q.39

Air used in aerobic fermentation must be sterilized, otherwise the

  • recovery of product will be difficult.
  • contamination of pure culture would result.
  • uniformity of product cannot be achieved.
  • none of these.
Q.40

For the hydrogenation of oils __________ (A) __________ is commonly used as catalyst and __________ (B) __________ is a catalyst poison.

  • (A) platinum (B) sulphur
  • (A) palladium (B) oxygen
  • (A) nickel (B) sulphur
  • (A) nickel (B) oxygen
Q.41

Which one of the following is not likely to be a constituent of vegetable oils ?

  • Citric acid
  • Oleic acid
  • Stearic acid
  • Glycerol
Q.42

Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove

  • colour
  • turbidity
  • bacteria
  • all (a), (b) and (c)
Q.43

__________ is an ore concentrating metallurgical process involving a chemical change.

  • Electromagnetic separation
  • Froth floatation
  • Roasting
  • none of these
Q.44

In the manufacture of viscose rayon, the raw material used industrially is

  • recalyptious wood
  • bamboo
  • bagasse
  • fine teak wood
Q.45

Fish contains about __________ percent oil.

  • 5
  • 10
  • 20
  • 35
Q.46

In an integrated steel plant, NH3 present in coke oven gas is normally recovered as

  • (NH4)2SO4
  • NH4Cl
  • (NH4)2 NO3
  • liquid NH3
Q.47

Alkylbenzene sulfonate (ABS) is a

  • detergent
  • rubber
  • pesticide
  • polyester
Q.48

High temperature carbonisation of coal produces

  • inferior coke compared to low temperature carbonisation.
  • less of gases compared to liquid products.
  • larger quantity of tar compared to low temperature carbonisation.
  • none of these.
Q.49

Main constituents of natural rubber is

  • polystyrene
  • polyisoprene
  • polybutadiene
  • polychloroprene
Q.50

Which of the following is an ore of iron ?

  • Galena
  • Chalcopyrite
  • Hematite
  • Bauxite
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