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Question
You have 3 metals and salt solutions of these metals.
Test
tube
Solution
A
Magnesium sulphate
B
Copper sulphate
C
Ferrous sulphate
HINT: (Magnesium sulphate -white colour, copper sulphate -blue colour, Ferrous sulphate- green colour )
When you were away, your younger brother added a metal in a blue coloured solution to make it green. Which of the following could have happened?
You have 3 metals and salt solutions of these metals.
Test
tube
Solution
| A | Magnesium sulphate |
| B | Copper sulphate |
| C | Ferrous sulphate |
When you were away, your younger brother added a metal in a blue coloured solution to make it green. Which of the following could have happened?
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Solution
The correct option is C Addition of iron to solution B
Copper sulphate solution is a blue coloured solution. Iron and magnesium are both more reactive than copper.
If iron falls in a solution of copper sulphate it replaces the copper ions and forms ferrous sulphate which is green in colour.
If magnesium falls in the solution of copper sulphate it also replaces the copper ions and forms magnesium sulphate which is colourless.
Copper sulphate solution is a blue coloured solution. Iron and magnesium are both more reactive than copper.
If iron falls in a solution of copper sulphate it replaces the copper ions and forms ferrous sulphate which is green in colour.
If magnesium falls in the solution of copper sulphate it also replaces the copper ions and forms magnesium sulphate which is colourless.
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