First slide

Corrosion

Question

Select the incorrect statements.

Moderate

A

Zn-Cu cell is called Daniell cell
B

Rust is ${Fe}_{2} O_{3}$
C

Saline water slows down rusting
D

Pure metals undergo corrosion faster than impure metal

Solution

$Rust is {Fe}_{2} O_{3} \cdot {xH}_{2} O$
Saline water speeds up the rusting process and impure metal corrodes more faster as compared to pure metal.

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