Q.1

Reaction of anhydrous liquid ammonia with orthophosphoric acid produces

  • ammonium phosphate
  • superphosphate
  • triple superphosphate
  • none of these
Q.2

HPO3 is the chemical formula of __________ phosphoric acid.

  • pyro
  • ortho
  • meta
  • none of these
Q.3

Both white phosphorous as well as red phosphorous

  • are soluble in CS2.
  • burns when heated in air.
  • reacts with hot caustic soda solution to give phosphine.
  • all (a), (b), and (c).
Q.4

Reaction of calcium fluorapatite with sulphuric acid produces

  • ortho-phosphoric acid.
  • simple superphosphate.
  • triple superphosphate.
  • red phosphorous.
Q.5

Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?

  • Water
  • Naphtha
  • Tar
  • Coal/coke oven gas
Q.6

Chemical formula of biuret is

  • NH2.CO.NH2
  • NH3.COO.NH3
  • NH2CONHCONH2
  • NH4COONH2
Q.7

Rock phosphate constitutes mainly of

  • fluorapatite
  • di-calcium phosphate
  • mono-calcium phosphate
  • di-ammonium phosphate
Q.8

In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at

  • low pressure.
  • high pressure.
  • very high temperature.
  • atmospheric pressure; as the pressure has no effect on conversion.
Q.9

Naphtha in a fertiliser plant is used as a source of

  • fuel
  • H2
  • N2
  • O2
Q.10

Main component of bone ash is

  • calcium sulphate
  • calcium phosphate
  • calcium carbonate
  • sodium phosphate
Q.11

Nitrogen content of urea is about __________ percent.

  • 10
  • 46
  • 80
  • 94
Q.12

In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.

  • Fauser-Monte Catini
  • Claude
  • Udhe
  • Kellog
Q.13

Monte catini process is used for the manufacture of

  • nitric acid
  • phosphoric acid
  • urea
  • calcium ammonium nitrate (CAN)
Q.14

Electric furnace method for production of phosphorous uses phosphate rock

  • and phosphoric acid
  • and coke
  • and sulphuric acid
  • silica and coke
Q.15

Catalyst used in steam reforming of naphtha is

  • nickel
  • platinum
  • silica gel
  • rhodium
Q.16

Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.

  • N2
  • KNO3
  • NO2
  • NHO3
Q.17

Dehydration of ammonium carbamate produces

  • urea
  • biuret
  • ammonia water
  • none of these
Q.18

Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)

  • use coal for heating purpose.
  • gasify coal to get hydrogen from coal gas.
  • use coal as filler in fertiliser.
  • use coal as conditioner in fertiliser.
Q.19

Pick out the wrong statement.

  • Dehydration of ammonium carbamate to produce urea is endothermic.
  • Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable.
  • Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid.
  • Phosphate rock when reacted with dilute H2SO4 produces superphosphate.
Q.20

Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of

  • comparatively higher pressure drop.
  • high cost of the high pressure vessel used for the reactor.
  • higher pumping cost.
  • chances of entrainment and disturbance of catalyst bed.
Q.21

Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.

  • 10
  • 25
  • 50
  • 80
Q.22

Catalyst used in ammonia synthesis uses __________ as a promoter.

  • Pt
  • K2O
  • Al2O3
  • Ni
Q.23

C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

  • 2
  • 6
  • 13
  • 20
Q.24

A phosphatic fertiliser containsP2O5. It could be

  • dicalcium phosphate
  • superphosphate
  • triple superphosphate
  • none of these
Q.25

Main constituent of phosphate rock is

  • ammonium phosphate
  • flour apatite
  • calcium fluoride
  • calcium phosphate
Q.26

Yield of elemental phosphorous from rock phosphate is about __________ percent.

  • 1-2
  • 15-25
  • 40-45
  • 60-65
Q.27

Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

  • adsorption on palladium.
  • cryogenic operations (low temperature cooling).
  • absorption (using ethanolamine or pyragalloll solution).
  • none of these.
Q.28

The essential ingradient of all the synthesis gas is

  • H2
  • O2
  • CO2
  • N2
Q.29

Promoter used in NH3 synthesis catalyst is

  • K2O
  • SiO3
  • V2O5
  • U2O3
Q.30

Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

  • steam reforming of naphtha and cracking of natural gas.
  • electrolysis of water.
  • cryogenic separation of hydrogen from coke oven gas.
  • all (a), (b) and (c)
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