25 JEE Main 2021 Environmental Chemistry previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Environmental Chemistry chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Environmental Chemistry chapter hub.
Which one of the following gases is reported to retard photosynthesis?
Given below are two statements : Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region…
The gas ' A ' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated…
The type of pollution that gets increased during the daytime and in the presence of O 3 is :
The green house gas/es is (are): (A) Carbon dioxide (B) Oxygen (C) Water vapour (D) Methane Choose the most appropriate…
Which one of the following chemical agent is not being used for dry-cleaning of clothes?
Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Stat…
The presence of ozone in troposphere:
Water sample is called cleanest on the basis of which one of the BOD values given below :
Which of the following statement(s) is (are) incorrect reason for eutrophication? (A) excess usage of fertilisers (B) e…
Log in to unlock the full list, track what you've solved, and practice on the TCS iON-style CBT player. It's free.