JEE Main 2019 (Online) 12th January Morning Slot | Environmental Chemistry Question 59 | Chemistry

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JEE Main 2019 (Online) 12th January Morning Slot

MCQ (Single Correct Answer)

-1

The molecule that has minimum /no role in the formation of photochemical smog, is -

CH₂ = O

O₃

N₂

JEE Main 2019 (Online) 12th January Morning Slot

MCQ (Single Correct Answer)

-1

Water samples with BOD values of 4 ppm and 18 ppm, respectively are -

Clean and Highly polluted

Highly polluted and Clean

Highly polluted and Highly polluted

Clean and Clean

JEE Main 2019 (Online) 11th January Evening Slot

MCQ (Single Correct Answer)

-1

The higher concentration of which gas in air can cause stiffness of flower buds ?

CO₂

SO₂

NO₂

JEE Main 2019 (Online) 11th January Evening Slot

MCQ (Single Correct Answer)

-1

Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :

acid rain

soil pollution

global warming

water pollution

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