Question

Which of the following statements is false?

(a) Salt water decelerates the rate of corrosion

(b) Magnesium is more active than iron

(c) During galvanization, ZnCO3.Zn(OH)2 is formed which prevent further corrosion

(d) Anti-rust solutions are used in car radiators to prevent rusting of iron parts of the engine

This question was addressed to me during an internship interview.

Query is from Electrochemistry in chapter Electrochemistry of Chemistry – Class 12

Answer 1

Correct choice is (a) Salt water decelerates the rate of corrosion

Best explanation: Saline medium has extra salts such as sodium chloride dissolved in water. It has a greater concentration of electrolyte than ordinary medium. The ions present will favour the formation of more electrochemical cells and favour the transfer of hydrogen ions and will thus promote rusting or corrosion.