defence exam Indian Army Nursing Assistant Mock Test Series 2025 General Science Chemistry Chemical Reaction
Student 'A' puts iron-nails in CuSO4 solution while the other student 'B' puts Cu pieces in FeSO4 solution. The observation that solution turns green from blue colour is reported by: .
1
Student 'A'
2
Student 'B'
3
Both Students 'A' and 'B'
4
None of them