Question

What amount of bromine will be required to convert $2g$ of phenol into $2,4,6-tribromophenol$?

• A. $4.00$
• B. $6.00$
• C. $10.22$
• D. $20.44$

Answer 1

Answer: (C)

$10.22$

Write equation for chemical change, find molecular masses of reactants and products and solve it.
Molecular weight of phenol
$=12\times 6+1\times 6+16=94$
Molecular wt. of $B{r}_2=3\times 160=480$
$\because 94$ of phenol requires $=480g$ of $B{r}_2$
$\therefore 2g$ of phenol requires $=\frac{480}{94}\times 2=10.22g$

The correct answer is 10.22 g