Question

Why is it advised to fix iron nails at equal distances ?​

Answer 1

${\huge{\underline{\underline{\mathcal{\red{A}\blue{n}\pink{s}\red{w}\blue{e}\pink{R::}}}}}}$

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.