ELECTRICAL CABLES QUIZ

Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

Either A or B

Hydrochloric

Sulphuric

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Hydrogen content of coke oven gas is __________ percent.

22

4

84

58

TRUE ANSWER : ?
YOUR ANSWER : ?

Rock phosphate constitutes mainly of

Di-calcium phosphate

Di-ammonium phosphate

Fluorapatite

Mono-calcium phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

Dehydration of ammonium carbamate produces

None of these

Ammonia water

Urea

Biuret

TRUE ANSWER : ?
YOUR ANSWER : ?

Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

Absence of air

Presence of an oxidising atmosphere

Presence of an inert atmosphere

Presence of a reducing atmosphere

TRUE ANSWER : ?
YOUR ANSWER : ?

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

15-25

60-65

1-2

40-45

TRUE ANSWER : ?
YOUR ANSWER : ?

In an ammonia plant, the purge off is essential to

Remove excess poisonous gases

Maintain H₂ : N₂ ratio at 3 :1

Remove uncondensed ammonia vapour

Maintain inert gas concentration within a limit

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical formula of metaphosphoric acid is

H₄P₂O₇

HPO₃

H₃PO₄

Same as that of pyrophosphoric acid

TRUE ANSWER : ?
YOUR ANSWER : ?

NPK means a __________ fertiliser.

Liquid

Solid

Mixed

Potassic

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Endothermic

Autocatalytic

Exothermic

Catalytic

TRUE ANSWER : ?
YOUR ANSWER : ?

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