The incorrect statement among the following is

Options

A. oxides of highly electropositive metals can be reduced by carbon at high temperature
B. in smelting to get tin from `"SnO"_(2)`, excess lime must be avoided
C. anodising is done to produce an oxide coating on a metal surface by making it anode during electrolysis
D. slag is usually lighter and floats on the surface of the molten metal

Answer

C

Explanation

In fact, anodising is not done for producing an oxide coating on a metal surface.