Chemical Engineering Mcqs

Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil?

• (A)  Nutrient supply
• (B)  Texture
• (C)  Water holding capacity
• (D)  All

Answer

Submitted By :Ali Uppal

Lower temperature and large excess of ammonia in urea melt__________________?

• (A)  Increases biuret formation
• (B)  Decreases biuret formation
• (C)  Is undesirable
• (D)  Does not effect biuret formation

Answer

Submitted By :Ali Uppal

Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?

• (A)  Phosphoric acid
• (B)  Superphosphate
• (C)  Phosphorous
• (D)  Triple superphosphate

Answer

Submitted By :Ali Uppal

The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ____________ percent?

• (A)  60
• (B)  30
• (C)  95
• (D)  100

Answer

Submitted By :Ali Uppal

Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?

• (A)  Increased biuret formation
• (B)  High corrosion rate
• (C)  Increased cost of equipment
• (D)  All

Answer

Submitted By :Ali Uppal

Which of the following is not a measure component necessarily to be present in fertilisers ?

• (A)  Nitrogen
• (B)  Potassium
• (C)  Phosphorous
• (D)  Sulphur

Answer

Submitted By :Ali Uppal

Fertiliser plants get their N2 requirements _____________________?

• (A)  By fractionation of liquefied air
• (B)  By dissociating oxides of nitrogen
• (C)  From coal gas (coke oven gas)
• (D)  From producer gas

Answer

Submitted By :Ali Uppal

Phosphatic fertiliser is graded based on its _____________ content?

• (A)  P2O3
• (B)  PCl5
• (C)  P2O5
• (D)  H3PO4

Answer

Submitted By :Ali Uppal

Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?

• (A)  Stabilisation
• (B)  Increasing the effectiveness
• (C)  Improving the strength & heat resistance
• (D)  All A, B & C

Answer

Submitted By :Ali Uppal

Naphtha in a fertiliser plant is used as a source of___________________?

• (A)  Fuel
• (B)  H2
• (C)  N2
• (D)  O2

Answer

Submitted By :Ali Uppal