defence exam Indian Army Nursing Assistant Mock Test Series 2025 General Science Chemistry Chemical Reaction
An iron blade is dropped into a bluish solution, After about half an hour, the colour of the solution is found to have changed to green and a brown-coloured deposit is observed on the nail. Based on this information which of the following can you conclude?
1
The green coloured solution is copper sulphate.
2
The blue coloured solution is Iron sulphate.
3
The brown deposit on the blade is copper.
4
The brown deposit on the blade is rust (Iron oxide)