Q.1

__________ is produced by the dehydrogenation of ethyl benzene.

  • Styrene
  • Ethyl alcohol
  • Cumene
  • Phenol
Q.2

In industrial nomenclature, alcohol means

  • butyl alcohol
  • propyl alcohol
  • ethanol
  • methyl alcohol
Q.3

Which of the following is not a food additive?

  • Citric acid
  • Invertage
  • Benzoyl peroxide
  • Ammonium chloride
Q.4

Glauber's salt is chemically represented by

  • Na2SO4.10H2O
  • CaCl(OCl)
  • CaSO4.H2O
  • (NH4)2SO4
Q.5

A substance produced by a living organism and capable of anti-microbial activity is called a/an

  • antibiotic
  • antiseptic
  • disinfectant
  • none of these
Q.6

Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.

  • flint
  • soda
  • pyrex
  • potash
Q.7

Chemical formula of oleum is

  • H2SO3
  • H2SO4
  • H2S2O7
  • H2SO7
Q.8

A cane sugar factory having sugar production rate oftons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).

  • 1
  • 10
  • 25
  • 40
Q.9

Polythene is a/an __________ polymerisation product.

  • addition
  • condensation
  • thermosetting
  • none of these
Q.10

A 'unit process' is exemplified by the

  • distillation
  • hydrogenation of oils
  • absorption
  • humidification
Q.11

Major component of flint glass is

  • lead oxide
  • silica
  • alumina
  • soda
Q.12

Pick out the wrong statement pertaining to nitric acid.

  • About 90% of nitric acid is manufactured by Ostwald's process.
  • It is a strong mono basic acid which reacts with almost all the metals except noble metals.
  • Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2).
  • Arc process of nitric acid manufacture is economical as compared to Ostwald's process.
Q.13

Main constituents of portland cement are calcium aluminate and

  • gypsum
  • silicates
  • sodium silicate
  • carbonates
Q.14

Soaps remove dirt by

  • increasing the surface tension.
  • decreasing wettability.
  • supplying hydrophyllic group.
  • none of these.
Q.15

Grignard reagent is chemically known as

  • ethyl magnesium chloride.
  • methyl magnesium chloride.
  • dichlorophenol.
  • monochloro acetic acid.
Q.16

Nitrogen is an essential component of

  • mineral salts
  • carbohydrates
  • fats
  • proteins
Q.17

Concentration of sulphide ores is done usually by

  • roasting
  • smelting
  • froth floatation
  • electro magnetic separation
Q.18

Proximate analysis of coal determines its __________ content.

  • moisture, ash, sulphur & volatile matter
  • moisture & volatile matter
  • moisture, sulphur, nitrogen & fixed carbon
  • none of these
Q.19

Which of the following is used as a coagulant in water treatment ?

  • Chloramine
  • Chlorine
  • Ferrous sulphate
  • Hydrogen peroxide
Q.20

Which of the following is the purest form of water out of the following ?

  • Underground water
  • Rain water
  • Well water
  • Lake water
Q.21

Alum is commercially produced from

  • gypsum
  • feldspar
  • galena
  • bauxite
Q.22

Chemical name of Grignard reagent is

  • sodium thiosulphate.
  • ethyl magnesium chloride.
  • sodium sulphite.
  • sodium bicarbonate.
Q.23

Deaeration of water in its treatment is necessary, as it

  • minimises its turbidity.
  • helps in controlling its taste and odour.
  • minimises its corrosiveness.
  • none of these.
Q.24

Zeigler process

  • produces high density polyethylene.
  • produces low density polyethylene.
  • uses no catalyst.
  • employs very high pressure.
Q.25

Electrodeposition of metals i.e. electroplating is never done on

  • metals
  • alloys
  • refractories
  • non-metals
Q.26

Sucrose content in cane sugar may be around __________ percent.

  • 50
  • 70
  • 80
  • 95
Q.27

Catalytic oxidation-dehydrogenation of methyl alcohol produces

  • formaldehyde
  • phenol
  • acetone
  • maleic anhydride
Q.28

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is

  • a slow reaction.
  • a discontinuous reaction (requiring regeneration of iron by water gas intermittently).
  • still in development stage (by employing fluidised bed technique).
  • all (a), (b) and (c).
Q.29

Gypsum is chemically

  • calcium chloride
  • potassium sulphate
  • sodium sulphate
  • calcium sulphate
Q.30

Alcohol percentage in molasses may be around

  • 10
  • 40
  • 70
  • 85
Q.31

Pick out the wrong statement.

  • High early strength cement are made from materials having high silica to lime ratio.
  • The function of gypsum in cement is to enhance its initial setting rate.
  • Acid resistant cements are known as silicate cement.
  • Major component of greyish portland cement is tricalcium silicate.
Q.32

Fusion of limestone and __________ produces high alumina cement.

  • sand
  • bauxite
  • quicklime
  • calcite
Q.33

Pure rectified spirit contains about __________ percent alcohol.

  • 45
  • 70
  • 95
  • 99.5
Q.34

Rotary kiln is not involved in the production of

  • cement
  • lime from limestone
  • slaked lime from quick lime
  • none of these
Q.35

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?

  • Xanthates
  • Stearic acid
  • Calcium & aluminium stearate
  • Formic acid
Q.36

The function of gypsum addition during cement making is to

  • increase the density of cement.
  • decrease the cement setting rate.
  • both (a) and (b).
  • neither (a) nor (b).
Q.37

Bromine content in sea water may be around __________ ppm.

  • 70
  • 640
  • 1875
  • 2500
Q.38

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

  • brighten the faint images.
  • remove metallic silver.
  • convert silver chloride to silver.
  • remove unexposed silver halide.
Q.39

Dacron is a/an

  • polyester
  • unsaturated polyster
  • polyamide
  • inorganic polymer
Q.40

His scrubbed from refinery gases by absorption using

  • dilute H2SO4
  • ethanol amine
  • chilled water
  • tri-butyl phosphate
Q.41

Pick out the exothermic reaction out of the following:

  • C + H2O = CO + H2
  • CaC2 + H2O = Ca(OH)2 + C2H2
  • MgCO3 = MgO + CO2
  • all (a), (b) and (c)
Q.42

__________ paper is used in the manufacture of newsprint paper.

  • Groundwood
  • Board
  • Tissue
  • Wrapping
Q.43

Use of water having dissolved oxygen in boilers promotes

  • corrosion
  • sequestration
  • scale formation
  • none of these
Q.44

CaO is called

  • quick lime
  • slaked lime
  • limestone
  • calcite
Q.45

Which of the following processes is absent in glass manufacturing process ?

  • Sintering
  • Annealing
  • Shaping or forming
  • Melting
Q.46

Hydrochloric acid is also known as

  • oil of vitriol
  • muriatic acid
  • strong organic acid
  • green acid
Q.47

Massecuite is

  • used for paper making.
  • used as a cattle feed.
  • highly acidic in nature.
  • none of these.
Q.48

Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

  • cutting
  • fibrillation
  • hydration
  • strengthening
Q.49

'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of

  • final rolling out of paper.
  • cutting of fibres.
  • hydration of fibres.
  • fibrillation of fibre.
Q.50

Main use of hydrazine is

  • as a rocket fuel
  • in water treatment
  • as a disinfectant
  • as fire retardant
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