JEE Main 2020 (Online) 3rd September Evening Slot | Environmental Chemistry Question 44 | Chemistry

JEE Main 2020 (Online) 3rd September Evening Slot

MCQ (Single Correct Answer)

-1

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

(a), (b) and (d)

(a), (c) and (d)

JEE Main 2020 (Online) 3rd September Morning Slot

MCQ (Single Correct Answer)

-1

Thermal power plants can lead to :

Ozone layer depletion

Blue baby syndrome

Eutrophication

Acid rain

JEE Main 2020 (Online) 2nd September Morning Slot

MCQ (Single Correct Answer)

-1

The statement that is not true about ozone is :

In the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with O₃ to give chlorine dioxide radicals

It is a toxic gas and its reaction with NO gives NO₂.

In the atmosphere, it is depleted by CFCs

In the stratosphere, it forms a protective shield against UV radiation

JEE Main 2020 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

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

for sustaining life in a water body.

by anaerobic bacteria to breakdown inorganic waste present in a water body.

for the photochemical breakdown of waste present in 1 m³ volume of a water body.

by bacteria to break-down organic waste in a certain volume of a water sample.

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