Chemical Engineering Answers

Triple superphosphate is produced by reacting...(1).......2..... With

a) (1) Phosphorous (2) dilute sulphuric acid b) (1) Phosphorous (2) orthophosphoric (c) (1) Phosphate rock (2) dilute sulphuric acid d) (1) Phosphate rock (2) orthophosphoric acid

Secondary nutrients in the fertilizers are

a) Nitrogen, Phosphorous, Potassium

b) iron, sulfur, molybdenum

c)Calcium, magnesium,zinc

d) Calcium, magnesium, sulfur

The fermentation of molasses to produce ethyl alcohol is done at___________ C

a)100-150°C.

b) < 5°C

c) 25-30°C

d) 250-300 °C

Portland cement is finely ground

a) Calcium aluminates and silicates of varying compositions

b) Calcium aluminates and caustic soda

c) Calcium aluminates and sodium silicates of varying compositions

d) Calcium silicates and gypsum of fixed composition

Chemical formula of Gypsum is

a) Calcium sulphate

c) Potassium sulphate. d) sodium sulfate.

The undesired product in the urea production process is

a) Ammonium carbamate b)ammonia

c) Biuret. d)water

The constituents of water gas are

a)CO and H₂. c)CO₂ and N₂

b) CO and N₂ d) CO and H₂O

Sulfur produced by oxidation-reduction of H₂S. The catalyst used in this process is

a) V₂O5

b) Platinum. c)Al2O3

d) Nickel