MCQ
Transition elements form binary compounds with halogens. Which of the following elements will form $\mathrm{MF}_3$ type compounds?
$a. Cr$
$b. Co$
$c. Cu$
$d. Ni$
$a. Cr$
$b. Co$
$c. Cu$
$d. Ni$
- ✓$a$ and $b$
- B$a$ and $c$
- C$b$ and $c$
- D$a$ and $d$