A group of students looked at different metals and metal sulphate solutions given in a tabular form. From the data answer the following :
(i) Which metal reacted with all other metal sulphate solutions ?
(ii) Which metal did not react with any other metal sulphate solution ?
(iii) Put the metals in decreasing order of reactivity.
(iv) Iron is slightly more reactive than cobalt. With which other metal sulphate solution, will it react ?
`{:("Metal","Metal sulphate solution","Colour"),("Chromium","Chromium sulphate","green"),("Cobalt","Cobalt sulphate","pink"),("Copper","Copper sulphate","blue"),("Magnesium","Magnesium sulphate","Colourless"):}`

Explanation

(i) Magnessium (Mg) reacted with all other metal sulphate solutions.
(ii) Copper (Cu) did not react with other metal sulphate solutions.
(iii) The decreasing order of reactivity of metals is : `Mg gt Cr gt Co gt Cu`.
(iv) Iron will react only with the solution of copper sulphate.