Question

the colour of both iron nails with the nail kept aside.​

Answer 1

Answer:

Bro your question is incomplete.

But here are few things that might help you in cracking it :)

○ Fe, when kept in a humid temperature, develops a flaky coating, called rust.

Rust-------------->$Fe_{2}O_{3}.xH_{2 } O$

○ Rust can't be formed even if a single of these is not available -

$H_{2}O\\O_{2}$

$Learning\;\;together\;:)$