Persons are medically considered to have lead poisoning if they have a concentration of greater than 10…

Persons are medically considered to have lead poisoning if they have a concentration of
greater than 10 micrograms of lead per decilitre of blood. Concentration in parts per billion
is
  1. 1000
  2. 100
  3. 10
  4. 1

Solution

$10 \mu \mathrm{g}$ per decilitre
$\Rightarrow 10 \times 10^{-6} \mathrm{~g}$ in $100 \mathrm{~mL}$
$\therefore 10^{9}$ parts $(1$ billion $)$ has $=\frac{10 \times 10^{-6}}{100} \times 10^{9} g=100 g$

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more SOLUTIONS questions on Aicharya