Question

Which of the following is the best route to prepare BeF2?

(a) thermal decomposition of BeF2

(b) thermal decomposition of beryllium

(c) thermal decomposition of (NH4)2BeF4

(d) thermal decomposition of Barium sulphate

The question was asked in unit test.

My doubt stems from s-Block Elements in division s-Block Elements of Chemistry – Class 11

Answer 1

The correct choice is (c) thermal decomposition of (NH4)2BeF4

The best I can explain: All the alkali Earth metals combine with halogen at elevated temperatures forming their halides, the thermal decomposition of (NH4)2BeF4, is best road and to prepare BeF2 and BeCl2 is conveniently made from the oxide.