JEE Main 2023 (Online) 8th April Evening Shift | Environmental Chemistry Question 9 | Chemistry

JEE Main 2023 (Online) 8th April Evening Shift

MCQ (Single Correct Answer)

-1

Which of these reactions is not a part of breakdown of ozone in stratosphere?

$$\mathrm{C{F_2}C{l_2}(g)\buildrel {uv} \over \longrightarrow \mathop C\limits^ \bullet l(g) + \mathop C\limits^ \bullet {F_2}Cl(g)}$$

$$\mathrm{C\mathop l\limits^ \bullet (g) + {O_3}(g)\buildrel {} \over \longrightarrow Cl\mathop O\limits^ \bullet (g) + {O_2}(g)}$$

$$\mathrm{2Cl\mathop O\limits^ \bullet \buildrel {} \over \longrightarrow Cl{O_2}(g) + C\mathop l\limits^ \bullet (g)}$$

$$\mathrm{Cl\mathop O\limits^ \bullet (g) + O(g)\buildrel {} \over \longrightarrow C\mathop l\limits^ \bullet (g) + {O_2}(g)}$$

JEE Main 2023 (Online) 8th April Morning Shift

MCQ (Single Correct Answer)

-1

Match List I with List II:

	LIST I (Species)		LIST II (Maximum allowed concentration in ppm in drinking water)
A.	$$\mathrm{F^-}$$	I.	< 50 ppm
B.	$$\mathrm{SO_4^{2-}}$$	II.	< 5 ppm
C.	$$\mathrm{NO_3^-}$$	III.	< 2 ppm
D.	$$\mathrm{Zn}$$	IV.	< 500 ppm

Choose the correct answer from the options given below :

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

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

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

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

JEE Main 2023 (Online) 6th April Morning Shift

MCQ (Single Correct Answer)

-1

The possibility of photochemical smog formation is more at :

Industrial areas

Himalayan villages in winter

The places with healthy vegetation

Marshy lands

JEE Main 2023 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

The industrial activity held least responsible for global warming is :

manufacturing of cement

Electricity generation in thermal power plants

steel manufacturing

Industrial production of urea

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