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1
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Hindi

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

A
sulfuric acid.
B
hydrofluoric acid.
C
phosphoric acid.
D
hydrochloric acid.
2
JEE Main 2022 (Online) 28th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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Correct statement about photo-chemical smog is :

A
It occurs in humid climate.
B
It is a mixture of smoke, fog and SO2.
C
It is reducing smog.
D
It results from reaction of unsaturated hydrocarbons.
3
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
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-1
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On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrite gives A and B while its reaction with its reaction with HCl produces B and C. A, B and C are, respectively

A
HOCl, HNO3, Cl2
B
Cl2, HNO3, HOCl
C
HClO2, HNO2, HOCl
D
HOCl, HNO2, Cl2O
4
JEE Main 2022 (Online) 27th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Given below are two Statements:

Statement I : Classical smog occurs in cool humid climate. It is a reducing mixture of smoke, fog and sulphur dioxide.

Statement II : Photochemical smog has components, ozone, nitric oxide, acrolein, formaldehyde, PAN etc.

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

A
Both Statement I and Statement II are correct.
B
Both Statement I and Statement II are incorrect.
C
Statement I is correct but Statement II is incorrect.
D
Statement I is incorrect but Statement II is correct.
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