Q JEE MAIN 2019

The correct set of species responsible for the photochemical smog is :

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Q JEE MAIN_2019_

The regions of the atmosphere, where clouds form and where we live, respectively, are :

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Q JEE MAIN 2019

The primary pollutant that leads to photochemical smog is

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Q JEE MAIN 2019

The compound used in the treatment of lead poisoning is :

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Q JEE MAIN 2019

The pH of rain water, is approximately

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Q JEE MAIN 2019

Which of the following conditions in drinking water causes methemoglobinemia?

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Q JEE MAIN 2019

Which of the following conditions in drinking water causes methemoglobinemia?

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Q JEE MAIN 2020

The condition that indicates a polluted environment is

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Q JEE MAIN 2020

The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is

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Q JEE MAIN 2019

The concentration of dissolved oxygen (DO) in cold water can go upto:

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Q JEE MAIN 2019

Air pollution that occurs in sunlight is :

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Q JEE Main 2019

Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding...

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Q JEE MAIN 2019

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

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Q JEE MAIN 2019

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

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Q JEE MAIN 2019

The reaction that is NOT involved in the ozone layer depletion mechanism in the stratosphere is :

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Q JEE MAIN 2021

In stratosphere most of the ozone formation is assisted by :

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Q JEE-MAIN 2021

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2021

The gas 'A' is having very low reactivity reaches to stratosphere. It is non–toxic and non–flammable but dissociated by UV—radiations...

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Q JEE MAIN 2019

Assertion : Ozone is destroyed by CFCs in the upper stratosphere. Reason : Ozone holes increase the amount of UV...

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Q JEE MAIN 2021

BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively :

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Q JEE-MAIN 2021

Water sample is called cleanest on the basis of which one of the BOD values given below

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Q JEE MAIN 2021

Water sample is called cleanest on the basis of which one of the BOD values given below

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Q JEE MAIN 2019

Which is wrong with respect to our responsibility as a human being to protect our environment?

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Q JEE MAIN 2021

Green chemistry in day–to–day life is in the use of:

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Q JEE MAIN 2021

Given below are the statements about diborane (a) Diborane is prepared by the oxidation of NaBH4 with I2 (b) Each...

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Q JEE MAIN 2021

The water having more dissolved O2 is :

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Q JEE MAIN 2021

Which one of the following gases is reported to retard photosynthesis ?

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Q JEE MAIN 2021

Which one of the following statements is NOT correct ?

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Q JEE MAIN 2019

The maximum prescribed concentration of copper in drinking water is :

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Q JEE MAIN 2021

Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Statement II...

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Q JEE-Main-2021_

Reducing smog is a mixture of:

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Q JEE MAIN 2021

The green house gas/es is (are) : (A) Carbon dioxide (B) Oxygen (C) Water vapour (D) Methane Choose the most...

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Q JEE MAIN 2021

The statements that are TRUE : (A) Methane leads to both global warming and photochemical smog (B) Methane is generated...

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Q JEE MAIN 2021

The type of pollution that gets increased during the day time and in the presence of $\mathrm{O}_3$ is :

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Q JEE MAIN 2022

Which among the following pairs has only herbicides ?

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Q JEE MAIN 2022

Given below are two statements: Statement I : The non bio-degradable fly ash and slag from steel industry can be...

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Q JEE MAIN 2022

Correct statement about photo-chemical smog is :

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Q JEE MAIN 2022

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion...

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Q JEE MAIN 2022

The acid that is believed to be mainly responsible for the damage of Taj Mahal is

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Q JEE MAIN 2022

Given below are two statements: Statement I: Classical smog occurs in cool humid climate. It is a reducing mixture of...

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Q JEE MAIN 2022

Polar stratospheric clouds facilitate the formation of :

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Q JEE MAIN 2022

The eutrophication of water body results in :

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Q JEE MAIN 2023

https://competishun.com/the-specific-conductance-of-0-0025-m-acetic-acid-is-5-times-10-5-mathrms-mathrmcm-1-at-a-certain-temperature-the-dissociation-constant-of-acetic-acid-is-____-times-10-7-nearest-integer-consider-limiting-molar-conductivity-of-mathrmch_3-mathrmcooh-as-400-mathrms-mathrmcm2-mathrmmol-1/

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Q JEE MAIN 2023

The delicate balance of $\mathrm{CO}_2$ and $\mathrm{O}_2$ is NOT disturbed by:

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Q JEE MAIN 2023

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

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Q JEE MAIN 2023

The group of chemicals used as pesticide is

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Q JEE MAIN 2023

The electrode potential of the following half cell at 298 K . $\mathrm{X}\left|\mathrm{X}^{2+}(0.001 \mathrm{M})\right|\left|\mathrm{Y}^{2+}(0.01 \mathrm{M})\right| \mathrm{Y}$ is $\_\_\_\_$ $...

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Q JEE MAIN 2023

Match List I with List II

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Q JEE MAIN 2023

The industrial activity held least responsible for global warming is :

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Q JEE MAIN 2023

The water quality of a pond was analysed and its BOD was found to be 4. The pond has

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Q JEE MAIN 2023

Correct statement is :

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Q JEE MAIN 2023

The number of correct statements from the following is ____ (A) Conductivity always decreases with decrease in concentration for both...

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Q JEE MAIN 2023

The radical which mainly causes ozone depletion in the presence of UV radiations is:

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Q JEE MAIN 2023

Given below are two statements: Statement I: If BOD is 4 ppm and dissolved oxygen is 8 ppm, then it...

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Q JEE MAIN 2023

The possibility of photochemical smog formation will be minimum at

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Q JEE MAIN 2023

Match List-I with List-II Choose the correct answer from the options given below:

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Q JEE MAIN 2023

The possibility of photochemical smog formation is more at

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Q JEE MAIN 2023

Which of the following is true about freons ?

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Q JEE-Main_2023

Formation of photochemical smog involves the following reaction in which A, B and C are respectively. (i) $\mathrm{NO}_2 \xrightarrow{\mathrm{hv}} \mathrm{A}+\mathrm{B}$...

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Q JEE MAIN 2023

Identify $\mathrm{X}, \mathrm{Y}$ and Z in the following reaction. (Equation not balanced) $$ \mathrm{ClO}+\mathrm{NO}_2 \underline{X} \xrightarrow{\mathrm{H}_2 \mathrm{O}} \underline{\mathrm{Y}}+\underline{\mathrm{Z}} $$

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Q JEE MAIN 2023

How can photochemical smog be controlled?

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Q JEE MAIN 2023

Some reactions of NO2 relevant to photochemical smog formation are Identify A, B, X and Y

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Q JEE MAIN 2023

Correct statement about smog is

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Q JEE MAIN 2023

Which of the following is true about freons ?

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