The acid that is believed to be mainly responsible for the damage of the Taj Mahal is ...

Which of the following atmospheric pollutants is not emitted by vehicles?

Dissolved oxygen is essential for aquatic life. What are the reasons responsible for the depletion of dissolved oxygen in water?

Given below are two statements :
Statement $I :$ The $pH$ of rain water is normally $\sim 5.6$.
Statement $II :$ If the $pH$ of rain water drops below $5.6,$ it is called acid rain.
In the light of the above statements,choose the correct answer from the options given below:

State whether the following statements are true or false:
$(1)$ Mist is produced by particles of spread liquid and by condensation of vapour in air.
$(2)$ Particulate matter of size up to $5 \ \mu m$ reaches directly into the lungs.
$(3)$ Ozone and nitric oxide cause irritation in the nose and throat.

Which among the following statements is $NOT$ a principle of green chemistry?