Poll Results
0%A. In test tube ‘P’ iron nail is coated with a blue coating and in test tube ‘Q’ there is no reaction.
100%B. Iron nail is coated with a brown coating in test tube ‘P’ and silver coating in test tube ‘Q’. ( 1 voter )
0%C. There is no reaction in either of the test tubes ‘P’ or ‘Q’.
0%D. There is no reaction in test tube ‘P’ but a silver coating on iron nail is seen in test tube ‘Q’.
Based On 1 Vote
Answer: When an iron nail is placed in aqueous copper(II) sulphate (tube P), iron, being more reactive, displaces copper ions; copper is deposited as reddish-brown metal on the nail and iron goes into solution as Fe²⁺. In aqueous silver nitrate (tube Q), iron similarly displaces silver; silver metal plates the nail producing a silver coating while iron salts form in the solution. Thus both tubes show displacement reactions, with copper and silver metals deposited respectively during the experiment period.