Question

Which of the following are not grouped according to similar chemical properties?

A. Cobalt, iron, nickel.
B. Iron, copper, ruthenium.
C. Ruthenium, iridium, palladium.
D. Gold, silver, copper.

Answer 1

B. iron, copper, ruthenium

Answer 2

Answer: The correct answer is Option D.

Explanation:

Elements which belong to same group show similar chemical properties because they have same number of valence electrons.

From the given options:

Option A: Cobalt belongs to Group 9, Iron belongs to Group 8 and Nickel belongs to Group 10. Hence, they will not show similar chemical properties.

Option B: Iron belongs to Group 8, Copper belongs to Group 11 and Ruthenium belongs to Group 8. Hence, they will not show similar chemical properties.

Option C: Ruthenium belongs to Group 8, Iridium belongs to Group 9 and Palladium belongs to Group 10. Hence, they will not show similar chemical properties.

Option D: Gold, Silver and Copper belongs to the same group which is Group 11. Hence, they all will show similar chemical properties.

Thus, the correct answer is Option D.