JEE Main 2022 (Online) 25th June Morning Shift | Environmental Chemistry Question 19 | Chemistry

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JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

The eutrophication of water body results in :

loss of Biodiversity.

breakdown of organic matter.

increase in biodiversity.

decrease in BOD.

JEE Main 2022 (Online) 24th June Evening Shift

MCQ (Single Correct Answer)

-1

Some gases are responsible for heating of atmosphere (green house effect). Identify from the following the gaseous species which does not cause it.

CH₄

O₃

H₂O

N₂

JEE Main 2021 (Online) 1st September Evening Shift

MCQ (Single Correct Answer)

-1

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

11 ppm

15 ppm

3 ppm

21 ppm

JEE Main 2021 (Online) 31st August Morning Shift

MCQ (Single Correct Answer)

-1

BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively :

A > 50, B < 27

A > 25, B < 17

A < 5, B > 17

A > 15, B > 47

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