Question

you are given with History solutions hydrochloric acid hn O3 and zncl2 and two containers made up of Copper and Aluminium in which of these two containers given solutions can become​

Answer 1

(i) Dilute HCl, Copper does not react with dilute HCl. Therefore, it can be kept.

(ii) Dilute HNO3, Nitric acid acts as a strong oxidising agent and reacts with copper vessel, therefore cannot be kept.

(iii) ZnCl2. Zinc is more reactive than copper (Cu) therefore, no displacement reaction occurs and hence can be kept.

(iv) H2O, Copper does not react with water. Therefore. can be kept.

(B) When solutions are kept in aluminium containers

i) Dilute HCI, Aluminium reacts with dilute HCl to form its salt and hydrogen is evolved. Therefore, cannot be kept. 2Al + 6HCl → 2AICl3 + 3H2.

(ii) Dilute HNO3, Aluminium gets oxidised by dilute HNO3 to form a layer of Al2O3 and cannot be kept.

(iii) ZnCI2, Aluminium being more reactive than zinc can displace zinc ion from the solution. Therefore, the solution cannot be kept. 2Al + 3ZnCl2 → 2AlCl3+ 3Zn

(iv) H2O, Aluminium does not react with cold or hot water. Therefore, water can be kept while aluminium is attacked by steam to form aluminium oxide and hydrogen 2Al(s) + 3H2O(g) → Al2O3(s) + 3H2(g). I think so....