List of top Chemistry Questions on Environmental Chemistry asked in JEE Main

Identify the incorrect pair from the following:
Formation of photochemical smog involves the following reaction in which $A , B$ and $C$ are respectively i $NO _2 \xrightarrow{ h\nu } A + B$ ii $B + O _2 \rightarrow C$ iii $A + C \rightarrow NO _2+ O _2$ Choose the correct answer from the options given below:

Photochemical smog found mainly in 

Consider the following:
  1. D.D.T.
  2. Aldrin
  3. Sodium arsenite
  4. Sodium chlorate
How many of these are pesticides?
Which of the following free radicals helps in depletion of the ozone layer?
In which of the following cities photochemical smog is minimum?
Given below are two statements:
Statement I: If BOD value is 4 ppm and dissolved oxygen is 8 ppm, it is a good quality water.
Statement II: If the concentration of zinc and nitrate is 5 ppm, then it can be used as good quality water.
Correct statement about smog is
Match the following List-I and List-II:
List-IIndustryList-IIWaste Generated
(A)Steel Plants(I)Gypsum
(B)Thermal Power Plants(II)Fly ash
(C)Fertilizer industries(III)Slag
(D)Ppaer mills(IV)Bio-degradable Wastes
Choose the correct answer from the options given below:
The concentration of dissolved Oxygen in water for growth of fish should be more than đť‘‹ ppm and Biochemical Oxygen Demand in clean water should be less than đť‘Ś ppm. X and Y in ppm are, respectively.
Which of these reactions is not a part of breakdown of ozone in stratosphere?
The photochemical smog does not generally contain :
The measured BOD values for four different water samples (A-D) are as follows:
A = 3 ppm; B = 18 ppm; C = 21 ppm; D = 4 ppm;. The water samples which can be called as highly polluted with organic wastes, are
Sulphur dioxide is one of the components of polluted air. SO2 is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by SO2 is
The mixture of chloroxylenol and terpineol is an example of
Dinitrogen and dioxygen, the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because
Correct statement about photo-chemical smog is:
Given below are two statements:
Statement I: The pH of rain water is normally ~5.6.
Statement II: If the pH of rain water drops below 5.6, it is called acid rain.
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 COâ‚‚ (D) methane is a part of reducing smog. Choose the most appropriate answer from the options given below :
Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Statement II : Bio-degradable detergents lead to eutrophication. In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Photochemical smog causes cracking of rubber.
Reason (R) : Presence of ozone, nitric oxide, acrolein, formaldehyde and peroxyacetyl nitrate in photochemical smog makes it oxidizing.
Choose the most appropriate answer from the options given below :
The gas 'A' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV-radiations in stratosphere. The intermediates formed initially from the gas 'A' are:
In stratosphere most of the ozone formation is assisted by :
BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively as :
The deposition of X and Y on ground surfaces is referred as wet and dry depositions, respectively. X and Y are :