JEE Main 2019 (Online) 9th April Evening Slot | Environmental Chemistry Question 54 | Chemistry

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JEE Main 2019 (Online) 9th April Evening Slot

MCQ (Single Correct Answer)

-1

The layer of atmosphere between 10 km to 50 km above the sea level is called as :

mesosphere

thermosphere

troposphere

stratosphere

JEE Main 2019 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

Excessive release of CO₂ into the atomosphere results in :

depletion of ozone

polar vortex

global warming

formation of smog

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

-1

The maximum prescribed concentration of copper in drinking water is:

3 ppm

5 ppm

0.5 ppm

0.05 ppm

JEE Main 2019 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

Assertion: Ozone is destroyed by CFCs in the upper stratosphere.

Reason: Ozone holes increase the amount of UV radiation the earth.

Assertion and reason are both correct, and the reason is the correct explanation for the assertion.

Assertion and reason are incorrect.

Assertion and reason are correct but, the reason is not the explanation for the assertion

Assertion is false, but the reason is correct.

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