Q.1

Common salt is generally not produced commonly by __________ method from brine.

  • freeze drying
  • electrolytic
  • solar evaporation
  • vacuum evaporation
Q.2

Massacuits is a terminology used in the __________ industry.

  • paint
  • oil hydrogenation
  • soap
  • sugar
Q.3

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.

  • -83
  • -183
  • -196
  • -218
Q.4

Mercury electrolytic cell produces 50-NaOH solution. Its operating temperature is __________ °C.

  • 25
  • 60-70
  • 150-200
  • 250-300
Q.5

Chemical name of soda ash is

  • sodium bicarbonate
  • sodium thiosulphate
  • potassium carbonate
  • none of these
Q.6

Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material ?

  • Slag cement
  • Glasses
  • Porcelain/Potteries
  • Teflon
Q.7

Essential oils are usually obtained using

  • steam distillation
  • extractive distillation
  • solvent extraction
  • leaching
Q.8

Exothermic condensation reaction of monochlorobenzene with chloral in presence ofoleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

  • 15-30
  • 90-100
  • 250-300
  • <0
Q.9

Low purity oxygen is used for

  • L.D. steel making.
  • cutting and welding of metals.
  • medicinal purposes.
  • chemical oxidation processes.
Q.10

Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is

  • 0.14
  • 0.34
  • 0.94
  • 1.4
Q.11

High temperature carbonisation of coal takes place at __________ °C.

  • 2000
  • 700
  • 1100
  • < 500
Q.12

Sodium carbonate (soda ash) is not used in the manufacture of

  • fire extinguishers
  • sugar
  • baking powder
  • detergents
Q.13

Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?

  • Oxidation of Na+ ions
  • Oxidation of Cl- ions
  • Reduction of Na+ ions
  • Reduction of Cl- ions
Q.14

Hydrodenation of vegetable oils is a/an __________ reaction.

  • endothermic
  • autocatalytic
  • exothermic
  • homogenous
Q.15

Starting raw material for the manufacture of maleic anhydride is

  • n-butene
  • benzene
  • either (a) or (b)
  • neither (a) nor (b)
Q.16

Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.

  • 1
  • 2.5
  • 5
  • 10
Q.17

Aryl benzene sulphonate (ABS) is a

  • detergent.
  • plasticiser for unsaturated polyester.
  • starting material for the synthesis of glycerine.
  • coating ingredient for photographic film.
Q.18

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

  • has larger production capacity per unit cell.
  • consumes less power per ton of Cl2 produced.
  • produces high purity (70%) caustic soda directly.
  • all (a), (b) and (c).
Q.19

Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of

  • trichloroethylene
  • perchloroethylene
  • parathion
  • methanol
Q.20

Carbon disulphide is mainly used in the production of

  • viscose rayon.
  • corundum.
  • plasticiser for unsaturated polyester.
  • paints.
Q.21

Commercial production of Vanaspati is done by __________ of edible vegetable oils.

  • hydrogenation
  • oxidation
  • hydrolysis
  • hydrocracking
Q.22

The basic constituent of vegetable oils is

  • triglyceride
  • fatty acids
  • fatty alcohol
  • mono esters
Q.23

Which is a high grade pulp ?

  • Rag pulp
  • Mechanical pulp
  • Sulphate pulp
  • Sulphite pulp
Q.24

Titanium dioxide is a/an __________ colour pigment.

  • white
  • black
  • yellow
  • blue
Q.25

Vanillin is a type of

  • anti-pyretic drug
  • food preservative
  • flavour
  • dye
Q.26

Glass is

  • mainly CaO
  • subjected to galvanising
  • a super cooled liquid
  • all (a), (b) and (c)
Q.27

Impurities present in brine is normally removed by treatment with

  • NH3 and CO2.
  • lime and soda ash.
  • lime, ammonia and carbon.
  • all (a), (b) and (c).
Q.28

Cement mainly contains

  • CaO, SiO2, Al2O3
  • MgO, SiO2, K2O
  • Al2O3, MgO, Fe2O3
  • CaO, MgO, K2O
Q.29

__________ is produced using molasses as the starting raw material.

  • Methyl alcohol
  • Ethyl alcohol
  • Benzol
  • Dimethyl ether
Q.30

Poly tetraflouro ethylene (P.T.F.E.) is known as

  • bakelite
  • teflon
  • celluloid
  • decron
Q.31

White phosphorous is stored under water, because

  • it does not react with water.
  • it is poisonous.
  • its kindling temperature in dry air is very low.
  • it is unstable.
Q.32

Viscose rayon

  • cannot be made from sulphite pulp.
  • utilises H2SO4, NaOH and CS2 during its manufacture.
  • cannot yield textile grade fibre.
  • none of these.
Q.33

Zeolite is a/an

  • naturally occuring clay which is capable of exchanging cations.
  • abrasive material.
  • catalyst used in shift conversion.
  • none of these.
Q.34

Permanent hardness of water is due to the presence of calcium & magnesium

  • bi-carbonates
  • sulphates & chlorides
  • carbonate
  • none of these
Q.35

Pick out the wrong statement.

  • Fibrillation of fibre during paper manufacture is done to develop the strength in paper.
  • Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number.
  • Bagasse fibre contains both lignin & cellulose.
  • Presence of sodium sulphate in pulp makes the pulp bleachability poor.
Q.36

Dacron (or terylene) fibres as compared to nylon'fibres have

  • better heat & acid resistant properties.
  • poorer resistance to alkalis.
  • poorer dyeability.
  • all (a), (b) and (c).
Q.37

Adipic acid is an intermediate in the manufacture of

  • perspex
  • nylon-66
  • polystyrene
  • bakelite
Q.38

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.

  • Phosphates
  • Chromates
  • Sulphates
  • Bi-carbonates
Q.39

Salt is added in the kettle during soap manufacture to separate

  • soap from lye.
  • glycerine from lye.
  • the metallic soap.
  • the unsaponified fat from soap.
Q.40

99.purity oxygen is used in

  • cutting and welding by oxy-acetylene flame.
  • hospitals for medicinal purposes.
  • gas masks and artificial breathing apparatus.
  • all (a), (b), and (c).
Q.41

Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene ?

  • AgO
  • Al2O3
  • ZnCl2
  • Fe2O3
Q.42

Baking soda is chemically represented by

  • Na2CO3
  • NaHCO3
  • Na2CO3.H2O
  • Na2CO3.10H2O
Q.43

Fourdrinier machine is used in the manufacture of

  • nylon-6
  • paper
  • antibiotics
  • sugar
Q.44

Celluloid is chemically

  • cellulose acetate
  • regenerated cellulose
  • cellulose nitrate
  • cellulose acetate butyrate
Q.45

The most economical pulp for the production of newsprint would be the __________ pulp.

  • groundwood
  • sulphate
  • sulphite
  • semichemical
Q.46

Stereospecific agents are exemplified by

  • radiation
  • supported metal oxide catalysts
  • ziegler catalysts
  • all (a), (b) & (c)
Q.47

Mercury cells for caustic soda manufacture, compared to diaphragm cells

  • require lower initial investment.
  • require more power.
  • produce lower concentration NaOH.
  • none of these.
Q.48

Temporary hardness of water can be removed by

  • addition of alum (a coagulant).
  • boiling.
  • filtration (through gravity sand filter).
  • addition of lime.
Q.49

Analgesic drugs are

  • pain relievers
  • antibiotics
  • used in the treatment of T.B.
  • used in the treatment of typhiod
Q.50

Hydrogenation of oil/fat does not

  • improve its resistance to rancid oxidation.
  • raise its melting point.
  • remove double bonds.
  • none of these.
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