Fertiliser Technology

141.Reaction of Cresylic acid with _________ produces Tricresyl phosphate.

1. Phosphorous pentoxide
2. Phosphorous oxychloride
3. Ammonium phosphate
4. Calcium phosphate

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142.Reaction of dilute sulphuric acid with phosphate rock produces

1. Phosphoric acid
2. Superphosphate
3. Triple superphosphate
4. Gypsum

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143.Reaction of nitric acid and sulphuric acid with phosphate rock produces

1. Nitrophosphate
2. Diammonium phosphate
3. Tricresyl phosphate
4. Tributyl phosphate

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144.Reaction of ortho-phosphoric acid with phosphate rock produces

1. Superphosphate
2. Triple superphosphate
3. Meta-phosphoric acid
4. Monoammonium phosphate

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145.Reaction of ortho-phosphoric acid with soda ash produces

1. Sodium Tributyl phosphate (STPP)
2. Tricresyl phosphate
3. Tributyl phosphate
4. Nitrophosphate

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146.Reaction of phosphate rock with 98% H₂SO₄ produces

1. Ortho-phosphoric acid
2. Superphosphate
3. White phosphorous
4. None of these

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147.Red phosphorous is changed into white phosphorous by

1. Heating in presence of light
2. Melting under pressure
3. Vaporisation followed by condensation
4. None of these

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148.Rock phosphate constitutes mainly of

1. Fluorapatite
2. Di-calcium phosphate
3. Mono-calcium phosphate
4. Di-ammonium phosphate

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149.Rock phosphate used for the production of phosphatic fertiliser is mined at (INDIA):

1. Amjhor (Jharkhand)
2. Talcher (Orissa)
3. Bailladella (M.P.)
4. Kiriburu (Bihar)

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150.Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

1. Carbonate
2. Phosphate
3. Bicarbonate
4. Silicate

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