Q.1

Which of the following is not an insecticide?

  • Hydrocyanic acid
  • Nicotine
  • Sodium flouride
  • Hexane
Q.2

Alcohol is produced by the

  • oxidation of an aldehyde
  • hydrolysis of an ether
  • esterification of a fat
  • none of these
Q.3

Chloramines are used in water treatment for

  • disinfection and control of taste & odour.
  • corrosion control.
  • removing turbidity.
  • control of bacteria.
Q.4

Transportation ofoleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

  • nitric acid
  • hydrochloric acid
  • methyl alcohol
  • formic acid
Q.5

Nickel is not used as a catalyst in the

  • Fischer-Tropsch process.
  • shift conversion.
  • hydrogenation of oil.
  • Ostwald's process of HNO3 manufacture.
Q.6

Sudden temperature fluctuation does not affect pyrex glass, because of its

  • low co-efficient of expansion.
  • high co-efficient of expansion.
  • high melting point.
  • both (b) and (c).
Q.7

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

  • SO3
  • Cl2
  • NH3
  • SO2
Q.8

Neoprene is chemically known as

  • polybutadiene
  • styrene butadiene rubber (SBR)
  • polyurathane
  • polychloroprene
Q.9

__________ glass is used for the manufacture of optical glass.

  • Pyrex
  • Soda
  • Flint
  • Crooke's
Q.10

__________ of rubber decreases after its vulcanisation.

  • Resistance to the action of organic solvent
  • Tackiness
  • Maximum service temperature
  • Tensile strength
Q.11

Industrial production of chloroform requires acetone and

  • phosgene
  • calcium hypochlorite
  • chlorine
  • ammonium chloride
Q.12

Mannheim furnace is used in the manufacture of

  • hydrochloric acid.
  • H2SO4 by Chamber process.
  • calcium carbide.
  • corundum.
Q.13

Which of the following is not required in the manufacture of soda ash by Solvay process ?

  • Ammonia
  • Limestone
  • Nitric acid
  • None of these
Q.14

Phosphoric acid is prepared from

  • cryolite
  • chalcopyrite
  • rock phosphate
  • none of these
Q.15

Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.

  • 10
  • 50
  • 80
  • 95
Q.16

Shrinkage volume in cement setting does not depend upon the

  • sand to cement ratio.
  • water to cement ratio.
  • ambient temperature fluctuation.
  • drying period.
Q.17

Bisphenol A is produced by the condensation of acetone with

  • formaldehyde
  • ethyl alcohol
  • diethyl ether
  • phenol
Q.18

Varnish does not contain

  • pigment
  • thinner
  • dryer
  • anti-skimming agent
Q.19

Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called

  • polyurethane
  • silicone
  • teflon
  • epoxy resin
Q.20

Glycerine is recovered from lye by

  • evaporation followed by vacuum distillation.
  • liquid extraction technique.
  • extractive distillation technique.
  • none of these.
Q.21

A mineral is termed as 'ore', if

  • a metal can be economically extracted from it.
  • it contains ≥ 40% metal.
  • the metal present in it is costly.
  • all (a), (b) and (c).
Q.22

The most stable allotropic form of phosphorous is the __________ phosphorous.

  • white
  • black
  • yellow
  • red
Q.23

__________ iron is the purest form of iron.

  • Cast
  • Wrought
  • Pig
  • High silicon
Q.24

__________ nature of hypo (sodium thiosulphate) makes it useful in photography.

  • Oxidising
  • Reducing
  • Complex forming
  • Photochemical
Q.25

Sugar content in sugarcane on cane basis is about __________ percent by weight.

  • 1 to 5
  • 5 to 10
  • 15 to 20
  • 20 to 30
Q.26

Plasticisers are added to paints to

  • make it corrosion resistant.
  • make glossy surface.
  • give elasticity & prevent cracking of the film.
  • increase atmospheric oxidation.
Q.27

Pick out the wrong statement.

  • Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%.
  • Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%.
  • 75% oleum can be produced by distillation of 20% oleum.
  • Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Q.28

Boiling of water containing temporary hardness produces

  • CO2
  • CaSO4
  • CaHCO3
  • none of these
Q.29

Pencillin, an antibiotic drug was discovered by

  • Alexender
  • Flaming
  • Dr. Zivago
  • none of these
Q.30

Styrene (a monomer for the production of polystyrene) is commercially produced by

  • catalytic dehydrogenation of ethyl benzene.
  • dehydration of ethyl alcohol followed by hydrogenation.
  • reacting ethylene oxide with acetal-dehyde.
  • fermentation of starch.
Q.31

Which of the following sugars is the sweetest?

  • Glucose
  • Fructose
  • Sucrose
  • Lactose
Q.32

Which of the following sugars is the sweetest?

  • Glucose
  • Fructose
  • Sucrose
  • Lactose
Q.33

Saponification number of an oil or fat

  • gives an idea about its molecular weight.
  • is inversely proportional to its molecular weight.
  • detects its adulteration.
  • all (a), (b) & (c).
Q.34

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

  • as a lubricant.
  • as a rust preventive.
  • in hard water for cleaning of cloth.
  • as a foam depressant in distillation column.
Q.35

Ore concentration by froth floatation utilises the __________ of ore particles.

  • density difference
  • wetting characteristics
  • terminal velocities
  • none of these
Q.36

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

  • sodium sulphide & sodium carbonate.
  • sodium sulphite & sodium carbonate.
  • sodium sulphite & sodium sulphide.
  • none of these.
Q.37

Inversion of sucrose produces

  • fructose
  • glucose
  • both (a) & (b)
  • neither (a) nor (b)
Q.38

In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst

  • gives higher conversion efficiency.
  • has a longer life and is not poisoned by arsenic.
  • handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant.
  • all (a), (b) and (c).
Q.39

Function of thinner in a paint is to

  • accelerate the oxidation of oil.
  • prevent gelling of the paint.
  • suspend pigments & dissolve film forming materials.
  • form a protective film.
Q.40

Enamels

  • give good glossy finish.
  • are same as varnish.
  • are prepared from non-drying oil.
  • do not contain pigment.
Q.41

__________ is an ore of lead.

  • Quartz
  • Galena
  • Siderite
  • Chalcopyrite
Q.42

Pick out the wrong statement.

  • Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively.
  • Protein catalysts are called enzymes.
  • The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes.
  • Total sugar content in molasses is about 10%.
Q.43

Resistance to fusion of the refractory under a steady rising temperature condition is called

  • spalling
  • refractoriness
  • both (a) & (b)
  • neither (a) nor (b)
Q.44

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.
Q.45

Starting material for the commercial production of ethyl alcohol in India is

  • rice
  • molasses
  • fruit of Mahua tree
  • maize
Q.46

Hydrogenation of oil takes place in a/an __________ reactor.

  • autothermal
  • trickle bed
  • plug flow
  • none of these
Q.47

The purpose of tanning in leather industry is to

  • stiffen the leather.
  • smoothen the leather.
  • make it flexible.
  • impart water resistance.
Q.48

Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?

  • Diaphragm electrolytic cell process
  • Mercury electrolytic cell process
  • Lime-soda process
  • None of these
Q.49

The main use of activated carbon in water treatment is to control

  • bacterial growth
  • taste and odour
  • turbidity
  • none of these
Q.50

Presence of carbonaceous matter in the sewage

  • causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures.
  • reduces sulphate ions to sulphides causing obnoxious smell.
  • increases the quantity of chlorine used for its purification.
  • all (a), (b) and (c).
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