railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Chemistry Classification of Elements and Periodicity in Properties
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
1
(i) and (ii)
2
(ii) and (iii)
3
(ii) and (iv)
4
(iii) and (iv)