Q.1

Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

  • phosphoric acid.
  • superphosphate.
  • phosphorous.
  • triple superphosphate.
Q.2

Monte catini process is a widely used process for the manufacture of

  • urea
  • calcium ammonium nitrate
  • triple superposphate
  • none of these
Q.3

Pick out the wrong statement.

  • Nitrogen is normally supplied in fertiliser either in ammoniacal or the nitrate form, from which the soil takes it up in the form of ammonium ions or nitrate ions and forms amino acids.
  • Calcium present in the fertiliser helps in correcting the soil acidity.
  • Particle size range of a good grannular fertiliser is 10-15 mesh and it contains less moisture as compared to finely divided powder form of fertiliser.
  • Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having by-product coke ovens.
Q.4

Fertiliser produced during soda ash manufacture by dual process is ammonium

  • chloride
  • sulphate
  • nitrate
  • none of these
Q.5

Which of the following does not come under the category of 'micro-nutrient' for plant growth?

  • Chlorine
  • Iron
  • Boron
  • Carbon
Q.6

Reaction of __________ acid with phosphate rock produces superphosphates.

  • hydrochloric
  • sulphuric
  • nitric
  • phosphoric
Q.7

Reaction of nitric acid and sulphuric acid with phosphate rock produces

  • nitrophosphate
  • diammonium phosphate
  • tricresyl phosphate
  • tributyl phosphate
Q.8

P2O5 content in superphosphate is about __________ percent.

  • 30-35
  • 15-20
  • 65-70
  • 85-90
Q.9

In an ammonia plant, the purge off is essential to

  • maintain inert gas concentration within a limit.
  • remove excess poisonous gases.
  • maintain H2 : N2 ratio at 3 :1.
  • remove uncondensed ammonia vapour.
Q.10

The composition of fresh feed to the high temperature, high pressure urea autoclave is

  • excess liquid ammonia and liquefied CO2.
  • excess liquid ammonia and compressed CO2 gas.
  • liquid ammonia and excess compressed CO2.
  • compressed ammonia gas and excess compressed CO2.
Q.11

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.12

Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

  • catalytic
  • endothermic
  • exothermic
  • autocatalytic
Q.13

Temperature and pressure in urea autoclave is

  • 120°C and 300 atm.
  • 190°C and 200 atm.
  • 400°C and 550 atm.
  • 200°C and 10 atm.
Q.14

Maximum stability of white phosphorous is at

  • very high pressure
  • atmospheric pressure
  • room temperature
  • >600°C
Q.15

Heating of orthophosphoric acid to about 900°C, produces

  • metaphosphoric acid
  • pyrophosphoric acid
  • no change in it
  • none of these
Q.16

Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?

  • Nitrogenous fertilisers
  • Phosphatic fertilisers
  • Potassic fertiliser
  • None of these
Q.17

__________ is required more for leafy crops.

  • Nitrogen
  • Phosphorous
  • Potassium
  • Carbon
Q.18

The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser.

  • nitrogenous
  • phosphatic
  • potassic
  • none of these
Q.19

Potassic fertilisers do not promote the development of

  • stems & leaves during early stage of plant growth.
  • starches of potatoes & grains.
  • sugar of fruits & vegetables.
  • fibrous materials of plants.
Q.20

Reaction of phosphate rock withH2SO4 produces

  • orthophosphoric acid
  • superphosphate
  • white phosphorous
  • none of these
Q.21

NPK fertiliser is a __________ fertiliser.

  • complex
  • mixed
  • nitrogenous
  • phosphatic
Q.22

The fertiliser plant getting hydrogen by electrolysis of water is situated at

  • Namrup
  • Nangal
  • Rourkela
  • Korba
Q.23

Triple superphosphate is chemically represented as

  • CaF2.3Ca3(PO4)2
  • 3Ca3(PO4)2
  • Ca(PO3)2
  • Ca(H2PO4)2
Q.24

Phosphatic fertilisers

  • are useful during early stage of the plant growth.
  • accelerate fruit formation in later stages of growth.
  • lessen the effect of excessive nitrogen application.
  • none of these
Q.25

Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?

  • Iso propyl alcohol
  • Butyl alcohol
  • Toluene
  • Hexane
Q.26

Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

  • osmotic pressure of the soil water becomes less than that of the plant sap.
  • soil becomes too alkaline.
  • osmotic pressure of the soil water becomes higher than that of the plant sap.
  • soil becomes too acidic.
Q.27

The optimum size of the ammonia plant is __________ tons/day.

  • 10
  • 100
  • 1000
  • 1000C.
Q.28

I argest capacity nitrogenous fertiliser plants (tons of NH3 per day) (2 Nos) in India are located at

  • Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat).
  • Talchar (Orissa) and Ramagundam (A.P.) both under FCI.
  • Korba (M.P.) and Talchar (Orissa) both under FCI.
  • Haldia (W.B) and Namrup (Assam) both under HFC.
Q.29

Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis ?

  • H2 separation from coke oven gas
  • Steam reforming of naphtha
  • Cracking of natural gas
  • Electrolysis of water
Q.30

Potassic fertiliser is graded based on its __________ content.

  • KCl
  • K2O
  • KNO3
  • K2SO4
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