Chemical Engineering Mcqs

Temperature and pressure in urea autoclave is_________________?

(A) 120°C and 300 atm

(B) 190°C and 200 atm

(C) 400°C and 550 atm

(D) 200°C and 10 atm

Submitted By: Ali Uppal


_____________ is the undesirable by-product produced in the manufacture of urea ?

(A) Ammonium carbonate

(B) Biuret

(C) Carbon dioxide

(D) Ammonium carbamate

Submitted By: Ali Uppal


A Potassic fertiliser contains 50% K2O. It could be _________________?

(A) Potassium sulphate

(B) Potassium chloride

(C) A mixture of NaCl + KCl

(D) None of these

Submitted By: Ali Uppal


Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________________?

(A) Low bulk density product

(B) Biuret formation

(C) Non-spherical prills

(D) Substantially wet non-flowing and sticky product

Submitted By: Ali Uppal


Which nutrient in fertiliser makes the plant stems stronger and increases branching ?

(A) Nitrogen

(B) Phosphorous

(C) Potassium

(D) Calcium

Submitted By: Ali Uppal


Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________?

(A) Presence of an inert atmosphere

(B) Presence of a reducing atmosphere

(C) Absence of air

(D) Presence of an oxidising atmosphere

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Ammonium phosphate is a _____________ fertiliser?

(A) Nitrogenous

(B) Phosphatic

(C) Complex

(D) Mixed

Submitted By: Ali Uppal


Nitrolime is chemically known as____________________?

(A) Calcium nitrate

(B) Ammonium nitrate

(C) Calcium ammonium nitrate (CAN)

(D) None of these

Submitted By: Ali Uppal


H3PO4 is the chemical formula of ______________ phosphoric acid?

(A) Pyro

(B) Ortho

(C) Meta

(D) None of these

Submitted By: Ali Uppal