Chemical Technology

1. Which of the mentioned is the formula of Oleum?

• a) H2S2O8

• b) H2S2O6

• c) H2S2O7

• d) H2S2O5

Answer explanation

Explanation: Oleum – (H2SO4+SO3) which on summing up the like compounds will give H2S2O7.

2. Which of the mentioned can be used as raw material to manufacture sulphuric acid?

• a) Iron pyrites

• b) Elemental Sulphur

• c) Hydrogen Sulphide

• d) All of the mentioned

Answer explanation

Explanation: Iron pyrites (FeS), Elemental Sulphur(S), Hydrogen Sulphur(H2S) all the mentioned has Sulphur so they can be used as raw material to manufacture sulphuric acid.

3. Which of the mentioned are constituents of producer gas?

• a) CO, N2, H2

• b) CO, H2

• c) H2, CH4, CO

Answer explanation

Explanation: Producer gas is produced from Coke, Air, and Steam as raw materials. So, CO,N2 and H2 will be the consituents.

4. High purity oxygen in used in which of the mentioned cases?

• a) Combustion

• b) Medical purposes

• c) Chemical reactions

• d) Oxidation processes

Answer explanation

Explanation: Medical purposes need 100% pure oxygen for respiration whereas the mentioned options take up the available free oxygen.

5. Linde’s cycle uses which of the following effects?

• a) Newton’s law of cooling

• b) Fouriers law

• c) Joule Thomson cooling

Answer explanation

Explanation: Linde’s cycle achieves liquefaction of gases by expansion through a throttle valve adiabatically which is known as Joule-Thomson cooling.

6. The three major components that are necessary in a fertilizer are?

• a) Na, K, S

• b) N, P, S

• c) N, Cl, K

• d) N, P, K

Answer explanation

Explanation: Nitrogen promotes development of stems and leaves, Phosphorus stimulates early growth and accelerates seeding and Potassium is essential for development of grains, sugars etc.

Ammonia manufactured by Haber’s process uses which of the mentioned as catalyst?

• a) Iron

• b) Molybdenum

• c) Titanium

• d) Zinc

Answer explanation

Explanation: In Haber’s process, Iron is used as catalyst and Molybdenum is used as promoter.

Which of the mentioned can be used as an explosive and a fertilizer?

• a) Ammonium Carbamate

• b) Urea

• c) Ammonium Chloride

• d) Ammonium Nitrate

Which of the mentioned are the principal constituents of an organic compound?

• a) Carbon, Oxygen and Nitrogen

• b) Carbon, Oxygen and Hydrogen

• c) Carbon, Oxygen and Sulphur

• d) Carbon, Oxygen and Sulphur

Answer explanation

Explanation: Any compound containing Carbon, Hydrogen and Oxygen as principal constituents is an organic compound.

Identify the organic chemical from the mentioned?

• a) Benzene

• b) Silicates

• c) Aluminates

• d) Sulphur

Answer explanation

Explanation: Benzene’s chemical formula is C6H6, which help us, identify it as organic chemical whereas the rest are inorganic, as they don’t posses Carbon, Oxygen, Hydrogen as chief constituents.