1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Which of the following is used for the preparation of colloids?
A
Van Arkel Method
B
Bredig’s Arc Method
C
Mond Process
D
Ostwald Process
2
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The statement that is not true about ozone is :
A
In the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with O3 to give chlorine dioxide radicals
B
It is a toxic gas and its reaction with NO gives NO2.
C
In the atmosphere, it is depleted by CFCs
D
In the stratosphere, it forms a protective shield against UV radiation
3
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
A
Pipette and distilled water
B
Clamp and phenolphthalein
C
Burette and porcelain tile
D
Bunsen burner and measuring cylinder
4
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In general the property (magnitudes only) that show an opposite trend in comparison to other properties across a period is
A
Electron gain enthalpy
B
Electronegativity
C
Ionization enthalpy
D
Atomic radius
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