1
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The mechanism of action of ''Terfenadine'' (Seldane) is :
A
Activates the histamine receptor
B
Helps in the secretion of histamine
C
Inhibits the secretion of histamine
D
Inhibits the action of histamine receptor
2
JEE Main 2020 (Online) 4th September Evening Slot
Numerical
+4
-0
Change Language
Consider the following equations :
2Fe2+ + H2O2 $$ \to $$ xA + yB
(in basic medium)
2MnO4- + 6H+ + 5H2O2 $$ \to $$ x'C + y'D + z'E
(in acidic medium)
The sum of the stoichiometric coefficients x, y, x', y', and z' for products A, B, C, D and E, respectively, is ______.
Your input ____
3
JEE Main 2020 (Online) 4th September Evening Slot
Numerical
+4
-0
Change Language
The number of chiral centres present in threonine is ________.
Your input ____
4
JEE Main 2020 (Online) 4th September Evening Slot
Numerical
+4
-0
Change Language
The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature from 27oC to 42oC. Its energy of activation in J/mol is _____.
(Take ln 5 = 1.6094; R = 8.314 J mol–1 K–1)
Your input ____
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