This chapter is currently out of syllabus
1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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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) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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A mixture of gases O2, H2 and CO are taken in a closed vessel containing charcoal. The graph that represents the correct behaviour of pressure with time is :
A
JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Surface Chemistry Question 76 English Option 1
B
JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Surface Chemistry Question 76 English Option 2
C
JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Surface Chemistry Question 76 English Option 3
D
JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Surface Chemistry Question 76 English Option 4
3
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
For the following Assertion and Reason, the correct option is
Assertion : For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements.
Reason : The reactants are most strongly adsorbed on group 7-9 elements.
A
Both assertion and reason are true and the reason is the correct explanation for the assertion.
B
The assertion is true, but the reason is false.
C
Both assertion and reason are true but the reason is not the correct explanation for the assertion.
D
Both assertion and reason are false.
4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :
A
AICl3 > K3[Fe(CN)6] > K2CrO4 > KBr = KNO3
B
K3[Fe(CN)6] < K2CrO4 < KBr = KNO3 = AlCl3
C
K3[Fe(CN)6] < K2CrO4 < AlCl3 < KBr < KNO3
D
K3[Fe(CN)6] > AlCl3 > K2CrO4 > KBr > KNO3
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