Explain : (a) Why copper is used to make taps, hot water tanks and not any other metal ? (b) What will happen, if iron nails are kept in a solution containing copper sulphate ? (c) Write the balanced chemical equations for the following and balance it:(i) Ca + H_2O to(ii) Al + HCl to(iii) Fe + H_2O to

Explain : (a) Why copper is used to make taps, hot water tanks and not

1.	Explain : (a) Why copper is used to make taps, hot water tanks and not any other metal ? (b) What will happen, if iron nails are kept in a solution containing copper sulphate ? (c) Write the balanced chemical equations for the following and balance it:(i) Ca + H_2O to(ii) Al + HCl to(iii) Fe + H_2O to
Answer» Solution :(a) Copper does not react with cold and hot water, nor it reacts with the steam of water. Moreover, it is cheap and EASILY available, HENCE, it is used to make taps and hot water TANKS. (b) When iron nails are kept in a copper sulphate solution, the blue COLOUR of the solution fades due to displacement of copper by iron. (c) `(i) Ca + 2H_2O to Ca(OH)_2 + H_2(g)` `(ii) 2Al + 6HCl to 2AlCl_3 + 3H_2(g)` `(iii) 3Fe + 4H_2O to Fe_3O_4 + 4H_2(g)`