JEE Main 2023 (Online) 13th April Morning Shift | Environmental Chemistry Question 3 | Chemistry

	LIST I		LIST II
A.	Nitrogen oxides in air	I.	Eutrophication
B.	Methane in air	II.	pH of rain water becomes 5.6
C.	Carbon dioxide	III.	Global warming
D.	Phosphate fertilisers in water	IV.	Acid rain

Choose the correct answer from the options given below :

A-II, B-III, C-I, D-IV

A-I, B-II, C-III, D-IV

A-IV, B-II, C-III, D-I

A-IV, B-III, C-II, D-I

JEE Main 2023 (Online) 11th April Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which of the following compounds is an example of Freon?

$$\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{F}_{2}$$

$$\mathrm{C}_{2} \mathrm{HF}_{3}$$

$$\mathrm{C}_{2} \mathrm{F}_{4}$$

$$\mathrm{C}_{2} \mathrm{Cl}_{2} \mathrm{F}_{2}$$

JEE Main 2023 (Online) 11th April Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

Given below are two statements:

Statement I : If BOD is 4 ppm and dissolved oxygen is 8 ppm, then it is a good quality water.

Statement II : If the concentration of zinc and nitrate salts are $$5 ~\mathrm{ppm}$$ each, then it can be a good quality water.

In the light of the above statements, choose the most appropriate answer from the options given below :

Statement I is incorrect but Statement II is correct

Both the statements I and II are incorrect

Both the statements I and II are correct

Statement I is correct but Statement II is incorrect

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