Practice Test: Question Set - 01
1. Sodium tri poly phosphate (STPP) is chemically represented as
- (A) Na5P3O10
- (B) Na4P3O8
- (C) Na3P4O6
- (D) Na2PO4
2. Which of the following does not come under the category of 'micro-nutrient' for plant growth?
- (A) Chlorine
- (B) Iron
- (C) Boron
- (D) Carbon
3. Raw materials for nitric acid manufacture are
- (A) Hydrogen
peroxide, air and water
- (B) Anhydrous
ammonia and air
- (C) Anhydrous
ammonia, air and water
- (D) Wet
ammonia, air and water
4. H4P2O7 is the chemical formula of __________ phosphoric acid.
- (A) Pyro
- (B) Ortho
- (C) Meta
- (D) None of
these
5. Plant tranquillisers
- (A) Hold
back stem growth and halt plants at a desired height
- (B) Cause
early maturation of plants
- (C) Accelerate
ripening of food and grain
- (D) Produce
seedless fruit
6. Catalytic ammonia synthesis reaction as in Haber's process is
- (A) Endothermic
- (B) Exothermic
- (C) Irreversible
- (D) None of
these
7. Nitrogen content of a nitrogenous fertilizer is 35%. It could be
- (A) Urea
- (B) Ammonium
nitrate
- (C) Calcium
ammonium nitrate (CAN)
- (D) Ammonium
sulphate
8. Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?
- (A) Urea
- (B) CAN
- (C) Ammonium
sulphate
- (D) Calcium
cyanamide
9. Nitrogen content of urea is about __________ percent.
- (A) 10
- (B) 46
- (C) 80
- (D) 94
10. The most suitable fertilizer for accelerating seeding or fruit formation in later stages of plant growth is __________ fertilizer.
- (A) Nitrogenous
- (B) Phosphatic
- (C) Potassic
- (D) None of
these
11. With increases in pressure, the conversion of Ammonium carbamate into urea
- (A) Increases
- (B) Decreases
- (C) Remains
unaltered
- (D) Can
either increase or decrease depends on biuret content
12. Triple superphosphate is made by reacting phosphate rock with __________ acid.
- (A) Phosphoric
- (B) Nitric
- (C) Sulphuric
- (D) Hydrochloric
13. Nitric acid is produced on commercial scale in a fertilizer plant by
- (A) Oxidation
of ammonia
- (B) CaNO3 +
H2SO4 reaction
- (C) Passing
air through high voltage electric arc
- (D) None of
these
14. __________ catalyst is used in the production of urea from CO2 and NH3.
- (A) Vanadium
pentoxide
- (B) No
- (C) Alumina
- (D) Nickel
15. In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at
- (A) Low
pressure
- (B) High
pressure
- (C) Very
high temperature
- (D) Atmospheric
pressure; as the pressure has no effect on conversion