Question

Which of the following statement is true regarding alkaline earth metals?

• A. Beryllium and barium compounds are poisonous in nature
• B. Beryllium shows diagonal relationship with aluminium
• C. Beryllium salts impart yellow colour to flame
• D. Both $A$ and $B$

Answer 1

Answer: (D)

Both $A$ and $B$

Due to comparatively same size as aluminium, Beryllium show diagonal relationship with aluminium. Same charge/size ratio.

Due to the high reactivity of metals, water-soluble compounds of $Be$ and $Ba$ are poisonous. So option $D$ is correct.