Environmental Chemistry — JEE Main PYQs

Water sample is called cleanest on the basis of which one of the BOD values given below:

The type of pollution that gets increased during the day time and in the presence of $\mathrm{O}{}_3$ is:

The green house gas/es is (are) :
(A) Carbon dioxide
(B) Oxygen
(C) Water vapour
(D) Methane

Choose the most appropriate answer from the options given below:

Which of the following statement(s) is (are) incorrect reason for eutrophication?
(A) Excess usage of fertilisers
(B) Excess usage of detergents
(C) Dense plant population in water bodies
(D) Lack of nutrients in water bodies that prevent plant growth

Choose the most appropriate …

The statements that are TRUE:
(A) Methane leads to both global warming and photochemical smog.
(B) Methane is generated from paddy fields.
(C) Methane is a stronger global warming gas than ${\mathrm{CO}}_2$.
(D) Methane is a part of reducing smog.

Choose the most appropriate a …

Given below are two statements:
Statement I: Non-biodegradable wastes are generated by the thermal power plants.
Statement II: Bio-degradable detergents leads to eutrophication.
In the light of the above statements, choose the most appropriate answer from the options given bel …

Among the gases (a) - (e), the gases that cause greenhouse effect are :
(a) ${\mathrm{CO}}_2$
(b) ${\mathrm{H}}_2\mathrm{O}$
(c) CFCs
(d) ${\mathrm{O}}_2$
(e) ${\mathrm{O}}_3$

Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm):

Thermal power plants can lead to:

The incorrect statement(s) among (a) - (d) regarding acid rain is (are):
(a) It can corrode water pipes.
(b) It can damage structures made up of stone.
(c) It cannot cause respiratory ailments in animals
(d) It is not harmful for trees

The condition that indicates a polluted environment is:

Which is wrong with respect to our responsibility as a human being to protect our environment?

Assertion : Ozone is destroyed by CFCs in the upper stratosphere.

Reason : Ozone holes increase the amount of UV radiation reaching the earth.

The maximum prescribed concentration of copper in drinking water is:

Excessive release of ${\mathrm{CO}}_2$ into the atmosphere results in:

Water filled in two glasses A and B have BOD values of 10 and 20 respectively. The correct statement regarding them is

Taj Mahal is being slowly disfigured and discoloured. This is primarily due to:

The higher concentration of which gas in air can cause stiffness of flower buds?

The correct set of species responsible for the photochemical smog is :

Air pollution that occurs in sunlight is:

The concentration of dissolved oxygen (DO) is cold water can go upto:

Peroxyacetyl nitrate (PAN), an eye irritant is produced by:

The molecules that has minimum/no role in the formation of photochemical smog is:

Water sample with BOD vales of 4 ppm and 18 ppm respectively are

The primary pollutant that leads to photochemical smog is:

The compound that is NOT a common component of photochemical smog is :

The upper stratosphere consisting of the ozone layer protects us from the sun's radiation that falls in the wavelength region of :

The layer of atmosphere between 10 km to 50 km above the sea level is called as:

Which of the following conditions in drinking water causes methemoglobinemia?

The pH of rain water is approximately

A water sample has ppm level concentration of the following metals: $\mathrm{Fe}=0.2,\mathrm{Mn}=5.0,\mathrm{Cu}=3.0,\mathrm{Zn}=5.0$. The metal that makes the water sample unsuitable for drinking is

The regions of the atmosphere, where clouds form and where we live, respectively, are:

A water sample has ppm level concentration of following anions
${\mathrm{F}}^{-}=10;{\mathrm{SO}}_4^{2-}=100;{\mathrm{NO}}_3^{-}=50$

The anion/anions that make/makes the water sample unsuitable for drinking is/ are :

Identify the wrong statements in the following:
(1) Chlorofluorocarbons are responsible for ozone layer depletion
(2) Greenhouse effect is responsible for global warming
(3) Ozone layer does not permit infrared radiation from the sun to reach the earth
(4) Acid rains is mostly be …

Regular use of which of the following fertilizer increases the acidity of soil?

The smog is essentially caused by the presence of