.In a beaker containing a blue coloured solution ‘P’, a metal ‘Q’ was added. It was left
undisturbed for sometimes. A colourless solution ‘R’ was formed and a reddish-brown
deposit ‘S’was observed at the bottom of the beaker. Metal Q is also used for the purpose
of galvanization.
(i) Write the equation for the reaction mentioned above after identifying the
substances P, Q, R and S.
(ii) Is the reverse reaction possible? Give reason.
(iii) Name a metal which can be used in place of Q for the reaction to occur
Answers
Explanation:
When zinc plate is dipped copper sulphate solution,zinc sulphate is formed and copper is deposited on zinc strip.
When zinc plate is dipped copper sulphate solution,zinc sulphate is formed and copper is deposited on zinc strip.Zn(s)+CuSO4(aq)→ZnSO4(aq)+Cu(s)
When zinc plate is dipped copper sulphate solution,zinc sulphate is formed and copper is deposited on zinc strip.Zn(s)+CuSO4(aq)→ZnSO4(aq)+Cu(s)(Silver whitish) (Blue) (colourless) (Reddish brown)
When zinc plate is dipped copper sulphate solution,zinc sulphate is formed and copper is deposited on zinc strip.Zn(s)+CuSO4(aq)→ZnSO4(aq)+Cu(s)(Silver whitish) (Blue) (colourless) (Reddish brown)This reaction shows that zinc is more reactive than copper as it displaces copper from its solution and zinc passes into solution as zinc ions and zinc sulphate solution is formed.