(i) Al and Fe
(ii) Al and Cu
(iii) Fe and Cu
(iv) Cu and Ag
Correct Answer:(i) Al and Fe
Explanation: The most abundant elements in the earth’s crust are Aluminium (8.1 %) and Iron (5.0%).
(i) Al and Fe
(ii) Al and Cu
(iii) Fe and Cu
(iv) Cu and Ag
Correct Answer:(i) Al and Fe
Explanation: The most abundant elements in the earth’s crust are Aluminium (8.1 %) and Iron (5.0%).