Chemical Engineering Answers

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

Soda ash is also called as

a) Sodium hydroxide

b) sodium carbonate

c) Sodium bicarbonate d) none of these.

6)The principal raw materials for the manufacture of soda ash by Solvay's method are. a) Limestone and potassium chloride

b) dolomite and sodium hydroxide

c)Limestone, brine and coal

d) coal and caustic soda

5)The most favorable conditions of temperature and pressure for oxidation of sulfur dioxide to sulfur trioxide are

a) Low temperature high pressure b) low temperature low pressure c) High temperature high pressure d) high temperature low pressure