MCQ
The atmospheric pollution is generally measured in the units of:
- AMass percentage
- BVolume percentage
- CVolume fraction
- ✓$\text{ppm}$
✓
Answer
Correct option: D.
$\text{ppm}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Among the following, the compound that is both paramagnetic and coloured is
Euchlorine is a mixture of
At a certain temperature the vapour pressure of pure water is $76\ mm$ of $Hg$ . When $1\ mol$ of $Na_2SO_4$ is dissolved in $36\ ml$ of water the vapour pressure of solution becomes $38\ mm$ of $Hg$ . What is the percentage dissociation of $Na_2SO_4$ in the solution ........... $\%.$
→Vitamin ${B_{12}}$ contains metal
→Select the correct statement among following
When primary amine is heated with $C{S_2}$ in presence of excess mercuric chloride, it gives isothiocyanate. This reaction is called
→Which has valency two
Which of the following is formed by the action of water on sodium peroxide
Rate constant of a reaction is given as
→${\log _{10}}K = - \frac{{2000}}{T} + 6.0$ Activation energy is ....... $kcal$
Which of the following structures is enantiomeric with the molecule (A) given below:
