Question

Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below:

• A. (A), (B), and (D) only.
• B. (A), (B), and (C) only.
• C. (A), (B), (C), and (D).
• D. (B), (C), and (D) only

Hint:

Elements in the same group of the periodic table often share similar properties.

Answer 1

The Correct Option is D

Europium (Eu) and Calcium (Ca) exhibit several similar properties:
Both are diamagnetic.
Both have insoluble sulfates and carbonates in water.
Both are soluble in liquid NH.
The dichlorides of both Europium and Calcium are insoluble in strong HCl.