Question

Better method for preparation of BeF₂, among the following is 

(1) \((NH_4)_2BeF_4 \xrightarrow{\triangle}BeF_2\)

(2) \(BeH_2 +F_2 \xrightarrow{\triangle}BeF_2\)

(3) \(Be+F_2 \xrightarrow{\triangle}BeF_2\)

(4) \(BeO+c+f_2 \xrightarrow{\triangle}BeF_2\)

Answer 1

(1) \((NH_4)_2BeF_4 \xrightarrow{\triangle}BeF_2\)

The better method of preparation of BeF₂ is heating (NH₄)₂BeF₄

 \((NH_4)_2BeF_4 \xrightarrow{\triangle}BeF_2\)