Calcium Phosphate and its Properties

This set of MCQs helps students to learn about calcium phosphate which appears as a white amorphous or crystalline powder that is odourless and tasteless. It is insoluble in ethanol, acetic acid but soluble in dilute nitric acid and hydrochloric acid. It slightly dissolves in water. It is found in bones, milk, teeth, and ground.

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Super phosphate grade of calcium phosphate is formed by reacting with which of the following acid?

H2SO4 HCl H3PO4 HNO3

What is the percentage of P2O5 present in triple super phosphate?

16-20% 42-50% 30-35% 62-70%

What is the chemical formula of super phosphate?

CaH4 (PO4)2 Ca3 (PO4)2 CaH4 (PO4)2∙CaSO4 (Ca3 (PO4)2)3∙CaF2

What is the chemical formula of triple super phosphate?

(Ca3 (PO4)2)3∙CaF2 CaH4 (PO4)2 Ca3 (PO4)2 CaH4 (PO4)2∙CaSO4

What is the reaction time of triple super phosphate formation?

15-20 min 5-6 min 5-15 min 20-30 min

Nitromethane is which type of propellants?

Monopropellants Bipropellant Solid propellants Liquid propellants

What is ‘hydrazine’?

Hypergolic material Non-hypergolic material Principal oxidizers Principal fuels

Which one is not an ideal performance criterion for propellants?

Non-corrosive Low toxicity Low density High heat of reaction

What is the major disadvantage associated with solid propellants compared to liquid propellants?

Temperature sensitivity High pressure Low pressure Insensitive to friction

Ammonia-sodium hypochlorite process is associated with which type of propellants production?

Boron-hydrogen compounds HNO3 N2O4 Hydrazine

Which process is used in sodium hypochlorite process to produce final product of anhydrous hydrazine?

Azeotropic distillation Evaporation Continuous distillation Batch distillation

How methyl borate is prepared?

CH3OH + B2 CH3OH + B3H3O6 CH3OH + B3H3 CH3OH + B2O4

In which type of burning process of solid propellants usually a solid grain is used?

Progressive burn Digressive burn Neutral burn Natural burn

Polysulfide is which types of propellants?

Composite propellants cmdb Single base propellants Double base propellants

What is HTPB?

An oxidizer A metallic fuel Curing agents Binder
Quiz/Test Summary
Title: Calcium Phosphate and its Properties
Questions: 15
Contributed by:
Steve