Environmental chemistry practice · Mixed difficulty

Ozone is an important constituent of stratosphere because it

Turpentine oil can be purified by this process

Which of the following gas is the major contributor of global warming?

Mesosphere and thermosphere are collectively known as

Measurement of rate of oxygen utilisation by a unit volume of water over a period of time is to measure

Many people died in London in 1952 as a result of air pollution producing……

Choose the process that is not the reason of increase of $\mathrm{CO}_2$ concentration in atmosphere.

The main gas involved in the formation classical smog is \underline A$\underline \mathrm{A}$ and the chemical nature of this smog is \underline B$\underline \mathrm{B}$ What are A and B respectively?

Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e., tetraethyl lead for improving octane number) is a lethal air pollutant, which causes:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Polluted water may have a value of BOD of the order of 17 ppm.
Reason R: BOD is a measure of oxygen required to oxidise both the bio-degradable and non-biodegradable organic material in water.
In the light of the above statements, choose the most appropriate answer from the options given below.

Presence of high concentration of ozone and smog in atmospheric air causes:

The depletion of ozone layer in the stratosphere would lead to:

Nitrolium is

Photochemical smog is a secondary pollutant and it is generally formed

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Hydrogen is an environment friendly fuel.
Reason R: Atomic number of hydrogen is 1 and it is very light element.
In the light of the above statements, choose the correct answer from the options given below

Which of the following statements is wrong?

It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of:

Which of the following statements is false?

The lowest layer of earth’s atmosphere is

Excessive release of $C{O_2}$ into the atmosphere results in

Pollutant____ forms by burning of fossil fuels.

Which one of the following is not a common component of classical smog?

Statement I: Chlorofluorocarbons are reactive and flammable organic molecules.

Statement II: $\mathrm{CO}_2$ is the major contributor to global warming.

In the light of above statements, select the correct option.

Which of the following statements about polar stratosphere
clouds (PSCs) is not correct?

Among the gases (a)-(e), the gases that cause greenhouse effect are:
a) $C{O_2}$
b) ${H_2}O$
c) $CFCs$
d) ${O_2}$
e) ${O_3}$

Which of the following is/are the main agents of soil erosion?

Identify the correct decreasing order of the following with respect to altitude from atmosphere.

I. Troposhere

II. Mesopshere

III. Thermosphere

Methane gas produces by_____ fields.

Thermal power plants can lead to

The false statement among the followings :