Question

Which of the following does not exist in free form.

• A. $B F _ { 3 }$
• B. $\mathrm { BCl } _ { 3 }$
• C.
• D. (e) None of these

Answer 1

Answer: (D)

(e) None of these

Answer 2

Boron form different hydride of general formula $B _ { n } H _ { n + 4 }$ and $B _ { n } H _ { n + 6 }$but $\mathrm { BH } _ { 3 }$ is unknown.