Chemistry - PERIODIC TABLE Question with Solution | TestHub

The correct statements are A, C, and D. Here is the breakdown:

A) BeF₂ has a significantly higher hydration energy than BaF₂ due to the small size of the Be²⁺ ion, making it more soluble.

B) This statement is incorrect; while AgI is colored due to the high polarizability of the I⁻ ion (not F⁻), AgF is indeed colorless.

C) BiF₅ exists because fluorine is small and highly electronegative, while BiI₅ does not exist due to steric hindrance and the strong reducing nature of I⁻.

D) BeCO₃ is less stable because the small Be²⁺ ion has a high polarizing power, which easily distort the large carbonate electron cloud, leading to decomposition at lower temperatures.