List of top Chemistry Questions on Environmental Chemistry

Acrolein, formaldehyde and peroxy acetyl nitrate are the main compounds present in photochemical smog. The total number of $\text{sp}^2$ carbons present in these three compounds is

Observe the following:

PANAcrolein\(\mathrm{CF_2Cl_2}\)\(\mathrm{CH_2O}\)Vinyl chloride
ABCDE

Identify the pollutants which are formed when unburnt hydrocarbons are released into atmospheric air.

Two statements are given below Statement--I: An object located at \(30\,\mathrm{km}\) above the sea level is in stratosphere. Statement--II: The maximum permissible limit of Cd present in drinking water is \(0.05\ \mathrm{ppm}\). The correct answer is
Ageing of skin, cataract and skin cancer are the result of
The major component of biogas is
Which of the following is not a green-house effect gas?
Identify the correct statements about Eutrophication
• [I.] It takes place in air
• [II.] It is due to excess oxygen in water
• [III.] It occurs in water
• [IV.] It leads to the destruction of aquatic life The correct answer is
Match the following:
Which of the following radical initiates the chain reaction responsible for depletion of ozone layer?
The oxides of which element are responsible for photochemical smog?
In winter, polar stratospheric clouds formed over Antarctica provide surface on which compound X responsible for depletion of ozone is formed. What is X?

Match the following:

 

High levels of which pollutant in blood induce premature delivery in pregnant women, who have the habit of smoking?
The BOD of highly polluted water is
The oxide of nitrogen responsible for depletion of ozone layer is
Which of the following in not to be considered as a primary fuel?
Which ions in drinking water causes a disease 'methemoglobinemia' when they are above permissible level?
In which of the following, pollutant in air/water is not correctly matched with its effect?

Identify the sets which contain greenhouse gases only:  I. $CO_{2}$, $SO_{3}$, $N_{2}$  II. $CO_{2}$, $CH_{4}$, $O_{3}$  III. $O_{2}$, $NO_{2}$, $SO_{2}$  IV. $O_{3}$, CFCs, $N_{2}O$  The correct answer is:

Which of the following gases causes greenhouse effect?
When salt BA is treated with Conc. H\(_2\)SO\(_4\), reddish brown gas is liberated. The aqueous solution of BA gives pale yellow precipitate with AgNO\(_3\) solution. Which of the following anion(A) is present in the salt BA?
Which material is suitable for water purification/softening?
The major constituent of biogas is:
Which of the following is present in emissions from unleaded petrol?
The major constituent of air (by volume) is: