Q.1

Contact process of sulphuric acid manufacture

  • yields acid of higher concentration than chamber process.
  • yields acids of lower concentration than chamber process.
  • is obsolete.
  • eliminates absorber.
Q.2

Na2CO3 is called

  • washing soda
  • soda ash
  • plaster of paris
  • calcite
Q.3

Which of the following is not an antibiotic ?

  • Penicillin
  • Streptomycin
  • Tetracyclin
  • Quinine
Q.4

Widely used method for the conditioning of boiler feed water is the

  • cold lime process
  • coagulation
  • hot-lime soda process
  • sequestration
Q.5

The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.

  • cationic
  • anionic
  • amphoteric
  • semi polar
Q.6

The most reactive allotropic form of phosphorus is __________ phosphorus.

  • red
  • yellow
  • violet
  • black
Q.7

Blue colour is imparted to glass by the addition of

  • FeSO4
  • PbO
  • CaO
  • NaOH
Q.8

Reaction of calcium carbide with water produces a gas, which is used

  • as an illuminant.
  • for metal cutting/welding.
  • both (a) & (b).
  • neither (a) nor (b).
Q.9

Salt is the basic raw material for the manufacture of

  • cement
  • glass
  • potteries
  • caustic soda
Q.10

Flux addition during smelting of ore is done to

  • remove impurities/gangue.
  • enhance rate of reaction.
  • accelerate reduction of ore.
  • separate slag from metal.
Q.11

Lithopaneis

  • explosive
  • white lead
  • filter aid
  • ZnS (white pigment)
Q.12

Pick out the wrong statement.

  • Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators.
  • Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur.
  • Lead azide is a popular military explosive.
  • TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being.
Q.13

Hydrazine is used in water treatment for the removal of

  • colloidal impurities
  • dissolved oxygen
  • turbidity
  • chlorinous taste
Q.14

What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?

  • Cl2 & Na
  • Cl2 & H2
  • O2 & H2
  • Cl2, H2 & NaOH solution.
Q.15

Hydrazine (N2H4) is used mainly as a/an

  • explosive
  • rocket fuel
  • detergents additive
  • none of these
Q.16

Direct conversion of chemical energy into electrical energy is done in a

  • magnetohydrodynamic (MHD) generator.
  • fuel cell.
  • fast breeder reactor.
  • none of these.
Q.17

__________ acid is the main constituent of cotton seed oil.

  • Acetic
  • Linoleic
  • Palmitic
  • Oleic
Q.18

Hydrocynic acid (HCN) is used as an insecticide for

  • controlling timber degradation by ants
  • controlling poultry lice
  • potato beetle
  • citrus fruits
Q.19

Which of the following is not produced commercially from sea water ?

  • Magnesium & potassium compounds
  • Common salt
  • Bromine
  • Iodine
Q.20

Chemical formula of 'salt cake' is

  • Na2SO4
  • CaSO4
  • MgSO4
  • BaSO4
Q.21

Molecular weight of plastics ranges from

  • 5000 to 10000
  • 20000 to 250000
  • 500 to 5000
  • 106 to l09
Q.22

Pick out the wrong statement.

  • Dry process is used for the manufacture of cement, when the raw material is blast furnace slag.
  • Portland cement is made employing wet process.
  • Gypsum is added to portland cement to lengthen its setting time.
  • none of these.
Q.23

Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in

  • pyrolysis of oil.
  • sintering of porous catalyst.
  • hydrogen embrittlement.
  • all (a), (b) and (c).
Q.24

Chemical name of 'alum' is

  • barium sulphate.
  • aluminium sulphate.
  • aluminium chloride.
  • calcium sulphate.
Q.25

Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

  • reduce its viscosity.
  • increase its viscosity.
  • reduce the variation in its viscosity with temperature.
  • increase the variation in its viscosity with temperature.
Q.26

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.

  • 70
  • 55
  • 80
  • 94
Q.27

Yellow glycerine is made into white, using

  • activated carbon
  • diatomaceous earth
  • bauxite
  • bentonite
Q.28

Main use of liquid nitrogen is in

  • rocket propulsion.
  • making gun powder.
  • detergent manufacture.
  • refrigerative cooling.
Q.29

__________ is produced using polycondensation reaction.

  • Polythene
  • Phenol formaldehyde
  • Poly vinyl chloride
  • none of these
Q.30

Calcination of gypsum produces

  • plaster of paris
  • salt cake
  • nitre cake
  • lime
Q.31

Unsaturated oils compared to saturated oils have

  • lower melting point & higher reactivity to oxygen.
  • higher melting point & higher reactivity to oxygen.
  • lower melting point & lower reactivity to oxygen.
  • higher melting point & lower reactivity to oxygen.
Q.32

The biochemical treatment applied to sewage effluents is a process of

  • dehydration
  • reduction
  • oxidation
  • polymerisation
Q.33

Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction

  • decreases with decrease of thickness of the flakes.
  • increases with the increasing flake size keeping the flake thickness constant.
  • increases Considerably with the rise of temperature.
  • decreases as the moisture content of flakes increases.
Q.34

Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.

  • hard
  • soft
  • metallic
  • lubricating
Q.35

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.

  • -5 to 0
  • 5 to 10
  • 30 to 50
  • 75 to 80
Q.36

Which of the following is a detergent ?

  • Fatty alcohol
  • Alkyl benzene sulphonate (ABS)
  • Fatty acids
  • Methylene chloride
Q.37

The noble gas which occurs most abundantly in the atmosphere is

  • helium
  • neon
  • krypton
  • argon
Q.38

The temperature in the calcium carbide furnace is __________ °C.

  • 200-300
  • 700-850
  • 2000-2200
  • 4000-4500
Q.39

Comparing sulphate process with sulphite process, we find that __________ in the later.

  • both temperature & pressure in the former is less than that
  • both temperature & pressure in the former is more than that
  • temperature is more in the former whereas pressure is more
  • pressure is more in the former whereas temperature is less
Q.40

Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

  • phthalic anhydride
  • vinyl chloride
  • maleic anhydride
  • dacron
Q.41

Phthalic anhydride is produced by the oxidation of

  • naphthalene
  • benzene
  • toluene
  • aniline
Q.42

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

  • increases
  • increases linearly
  • decreases
  • decreases linearly
Q.43

Ultimate analysis of coal determines its __________ content.

  • carbon, hydrogen, nitrogen & sulphur
  • carbon, ash, sulphur & nitrogen
  • carbon, sulphur, volatile matter & ash
  • carbon, volatile matter, ash & moisture
Q.44

Sea weeds are an important source of

  • fluorine
  • chlorine
  • bromine
  • iodine
Q.45

Synthetic glycerine is produced from

  • toluene
  • phenol
  • propylene
  • naphthalene
Q.46

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

  • reverse osmosis
  • sand filter
  • lime soda
  • permutit
Q.47

Sulphuric acid is mainly used in the __________ industry.

  • fertiliser
  • steel
  • paper
  • paint
Q.48

Production of alcohol by fermentation of molasses is an __________ process.

  • anaerobic
  • aerobic
  • endothermic
  • both(b) and (c)
Q.49

Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

  • 4 kgf/cm2 & 500°C.
  • 10 kgf/cm2 & 1000°C.
  • 40 kg/cm2 & 200°C.
  • 100 kgi/cm2 & 500°C.
Q.50

Which of the following is a disacchride ?

  • Sucrose
  • Glucose
  • Starch
  • Maltose
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