Engineering :: Fertilizer Technology
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| 81. |
Superphosphate is made by reacting phosphate rock with |
| A. |
dilute sulphuric acid |
B. |
orthophosphoric acid |
| C. |
hydrochloric acid |
D. |
gypsum |
Answer: Option A
Explanation:
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| 82. |
Triple superphosphate is made by reacting phosphate rock with |
| A. |
dilute sulphuric acid |
B. |
orthophosphoric acid |
| C. |
hydrochloric acid |
D. |
nitric acid |
Answer: Option B
Explanation:
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| 83. |
Triple superphosphate is made by reacting phosphate rock with orthophosphoric acid. It is represented by |
| A. |
CaH4(PO4)2 |
B. |
CaH2(PO4)2 |
| C. |
Ca3H4(PO4)2 |
D. |
Ca3(PO4)2 |
Answer: Option A
Explanation:
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| 84. |
Orthophosphoric acid forms |
| A. |
H3PO4.H2O in water solutions |
B. |
(H3PO4)2.H2O in water solutions |
| C. |
(H3PO4)4.H2O in water solutions |
D. |
(H3PO4)3.H2O in water solutions |
Answer: Option B
Explanation:
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| 85. |
Superphosphate contains |
| A. |
16-20% P2O5 |
B. |
30-35% P2O5 |
| C. |
42-50% P2O5 |
D. |
70-75% P2O5 |
Answer: Option A
Explanation:
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| 86. |
Triple superphosphate contains |
| A. |
16-20% P2O5 |
B. |
42-45% P2O5 |
| C. |
70-75% P2O5 |
D. |
90-92% P2O5 |
Answer: Option B
Explanation:
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| 87. |
The chemical formula of monoammonium phosphate is |
| A. |
NH4HPO4 |
B. |
NH4H2PO4 |
| C. |
NH4H2HPO4 |
D. |
(NH4)2HPO4 |
Answer: Option B
Explanation:
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| 88. |
The chemical formula of diammonium phosphate is |
| A. |
(NH4)2HPO4 |
B. |
(NH4)2H2PO4 |
| C. |
NH4H2PO4 |
D. |
(NH4)2PO4 |
Answer: Option A
Explanation:
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| 89. |
Ammonium phosphates are made by reacting anhydrous liquid ammonia with |
| A. |
nitric acid |
B. |
orthophosphoric acid |
| C. |
strong sulphuric acid |
D. |
metaphosphoric acid |
Answer: Option B
Explanation:
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| 90. |
The chemical formula of sodium tripolyphosphate (STPP) is |
| A. |
Na5P3O10 |
B. |
Na3P5O10 |
| C. |
Na3P3O10 |
D. |
Na5P2O5 |
Answer: Option A
Explanation:
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