BE Biotechnology Semester 2 (FE First Year) - University of Mumbai Important Questions for Applied Chemistry 2

Explain why cathodic coating is preferred over anodic coating for manufacturing of containers to store food stuffs.

Porous Film is also called as ‘Non protective Film’. Explain with an example.

Define Electrochemical Corrosion. Explain Intergranular Corrosion with a neat diagram.

Iron does not rust even if the zinc coating is broken in a galvanized iron pipe.Give reasons. 

Calculate the higher and lower calorific values of coal sample contains 84%carbon, 1.5% sulphur, 0.6 Nitrogen, 5.5% hydrogen and 8.4% oxygen. 

What is cathodic protection?

Explain impressed current cathodic protection with the applications.

Mention three functions of thinner in paint. 

Define corrosion of metals. Explain the electrochemical theory of wet corrosion, giving its mechanism. 

List the three main constituents of paint and give functions of each.

Explain how areas of cathode and anode affect the rate of corrosion.

Explain how the following factors affect the rate pf corrosion 

i) pH

ii) Ratio of anode to cathode areas. 

iii) Position of metal in galvanic series.

Gold does not get corroded due to oxidation. Why?

Distinguish between anodic and cathodic coating 

Explain the advantages of galvanizing over tinning.

Explain the following factor affecting the rate of corrosion:
Relative areas of anode and cathode.

Explain the following factor affecting the rate of corrosion: 
Purity of Metal

Explain the following factor affecting the rate of corrosion: Effect of pH

What is pigment?

Give two functions of pigment.