Q.1

Calcination of limestone is not done in a __________ kiln for producing lime.

  • vertical shaft
  • rotary
  • fluidised bed
  • fixed bed
Q.2

Tall oil obtained as a by-product from the black liquor recovery is

  • a black, sticky & viscous liquid.
  • used in the manufacture of greases, emulsions & soaps.
  • composed mainly of rosin & fatty acids.
  • all (a), (b) & (c).
Q.3

Commercially ethylene is produced from naphtha by

  • catalytic cracking.
  • catalytic dehydrogenation.
  • pyrolysis.
  • hydrocracking.
Q.4

Which of the following, when pyrolysed, produces perchloro-ethylene ?

  • Ethylene dichloride
  • Chlorobenzene
  • Carbon tetrachloride
  • Chlorinated paraffin
Q.5

The major constituents of glass are

  • lime, clay and soda ash
  • sand, lime and soda ash
  • silica, alumina and clay
  • silica, alumina and soda ash
Q.6

Gun powder uses

  • sulphur
  • charcoal
  • potassium nitrate
  • all (a), (b), & (c)
Q.7

__________ is a polysacchride.

  • Maltose
  • Starch
  • Sucrose
  • Glucose
Q.8

Neoprene is a

  • monomer
  • synthetic rubber
  • polyester
  • none of these
Q.9

Poly Vinyl Chloride (P.V.C.) is a __________ material.

  • thermosetting
  • thermoplastic
  • fibrous
  • chemically active
Q.10

Chemical name of aspirin (an analgesic drug) is

  • acetylsalicylic acid
  • nictonic acid
  • calcium acetate
  • methyl salicylate
Q.11

Margarine is a/an

  • fat
  • explosive
  • plasticiser
  • rocket propellant
Q.12

Dichloro diphenyl __________ is the full form of DDT (an insecticide).

  • tetrachloroethane
  • trichloroethane
  • tetrachloromethane
  • trichloromethane
Q.13

Styrene is produced from ethyl benzene by the process of

  • dehydrogenation
  • oxidation
  • alkylation
  • dehydration
Q.14

Saponification value/number of an oil or fat is a measure of its

  • fatty acid content.
  • degree of unsaturation of the fatty acids present in it.
  • average molecular weight.
  • insoluble fatty acid content.
Q.15

Pig iron is produced by blast furnaces in India using mostly the iron ore named

  • hematite
  • magnetite
  • siderite
  • chalcopyrite
Q.16

Which is the most efficient absorbant for SO3 out of the following ?

  • 20% oleum
  • 65% oleum
  • 78%H2SO4
  • 98%H2SO4
Q.17

Oils and fats are converted to soap in a process called

  • hydrogenation
  • esterification
  • saponification
  • none of these
Q.18

The basic difference between vegetable oils and fats is in their

  • density
  • chemical properties
  • physical state
  • composition
Q.19

Acetone is produced by catalytic dehydrogenation of

  • phenol
  • naphthalene
  • isopropanol
  • ethyl benzene
Q.20

Ethyl alcohol cannot be produced

  • from waste sulphite substrate of paper mills.
  • by esterification and hydroloysis of ethylene.
  • from molasses.
  • none of these.
Q.21

The difference between saponification value and acid value is

  • called ester value.
  • always negative.
  • constant for all fatty oils.
  • none of these.
Q.22

Coal tar is used as a

  • binding material for coal briquettes.
  • fuel in rotary kiln.
  • binder in making carbon electrodes.
  • all (a), (b) and (c).
Q.23

Glycerine can be obtained from

  • fat
  • naphthalene
  • cumene
  • sucrose
Q.24

Calgon used in water treatment is chemically

  • sodium phosphate
  • sodium hexametaphosphate
  • calcium phosphate
  • tricresyl phosphate
Q.25

Kaoline is a/an

  • refractory material
  • synthetic resin
  • artificial abrasive
  • blue pigment
Q.26

Pick out the wrong statement.

  • Catalytic hydrogenation of carbon monoxide produces methyl alcohol.
  • In nylon-6, the number 6 represents the total number of carbon atoms in the ring.
  • Raw materials for DDT manufacture are benzene and chlorine.
  • Ethanolamines are produced by using ammonia and ethylene oxide as raw material.
Q.27

The process used for the manufacture of ethyl alcohol from molasses is

  • distillation
  • dehydration
  • dehydrogenation
  • none of these
Q.28

Drinking (potable) water treatment does not involve

  • coagulation
  • sedimentation
  • softening
  • disinfection
Q.29

Which oil is preferred for paint manufacture ?

  • Drying oil
  • Non-drying oil
  • Semi-drying oil
  • Saturated oil
Q.30

Hydrogenation of edible vegetable oils

  • is an exothermic reaction.
  • increases their melting point.
  • is done in presence of nickel catalyst.
  • all (a), (b) and (c).
Q.31

Molecular weights of polymers are in the range of

  • 102 - 102
  • 105 - 109
  • 102 - 107
  • 109 - 1011
Q.32

Fermentation of molasses to produce ethyl alcohol is done at __________ °C

  • 20 - 30
  • < - 5
  • 100 - 150
  • 250 - 300
Q.33

The catalyst used in the production of elemental sulphur from H(by oxidation-reduction) is

  • alumina
  • silica gel
  • platinum
  • nickel
Q.34

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

  • 75
  • < 10
  • > 30
  • 50
Q.35

Phenol formaldehyde resin is used as an adhesive in making

  • laminates
  • card boxes
  • furniture
  • books
Q.36

Styrene butadiene rubber (SBR) is

  • a natural rubber.
  • a synthetic polymer.
  • a synthetic monomer.
  • another name of silicone rubber.
Q.37

Phenol is mainly used

  • to produce benzene.
  • to produce phenol formaldehyde.
  • to produce polyester resin.
  • as a plasticiser for unsaturated polyster.
Q.38

Main constituent of dolomite is

  • CaCO3
  • MgCO3
  • K2CO3
  • Na2CO3
Q.39

Sulphur removal by heating of pyrite ore in presence of air is called its

  • reduction
  • roasting
  • calcination
  • smelting
Q.40

Deacon's method is used for the manufacture of

  • glauber's salt
  • common salt
  • chlorine
  • graphite electrode
Q.41

The catalyst used in the manufacture of DDT is

  • alumina.
  • silica.
  • 20% oleum.
  • aluminium chloride.
Q.42

Most widely and commonly used coagulant for the removal of suspended impurities in water is

  • bleaching powder
  • slaked lime
  • alum
  • copper sulphate
Q.43

A good quality coal should have

  • low fusion point of ash
  • high ash content
  • high sulphur content
  • none of these
Q.44

Zeolite used in water softening process (cation exchange) is regenerated by washing with

  • brine
  • chloramines
  • sodium bisulphite
  • liquid chlorines
Q.45

Absorption of SO3 inH2SO4 is

  • exothermic
  • endothermic
  • not possible
  • none of these
Q.46

Pick out the correct statement.

  • A fat is converted into oil by its hydrogenation.
  • There is no difference between a fat and an oil so far as its physical properties are concerned.
  • All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
  • Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.
Q.47

DDT should not be allowed to come in contact with iron (during its manufacture) to

  • avoid its decomposition.
  • prevent sulphonation of the monochlorobenzene by the acid catalyst.
  • achieve non-hygroscopic property.
  • none of these.
Q.48

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

  • 1 atm & 100°C
  • 5 atm & 275°C
  • 100 atm & 500°C
  • 50 atm & 1000°C
Q.49

Conversion of CO to CO2 by steam in presence of a catalyst is called

  • steam reforming.
  • shift conversion.
  • steam gasification.
  • none of these.
Q.50

Pick out the true statement pertaining to water treatment.

  • Slow sand filters can remove colour completely.
  • Activated carbon can be used for taste & odour control without subsequent filtration.
  • Application of activated carbon reduces the temporary hardness of water.
  • Normally, the turbidity is removed by adding a coagulent prior to sedimentation.
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