1
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the given chemical reaction, colors of the Fe2+ and Fe3+ ions, are respectively :

5Fe2+ + MnO$$_4^ - $$ + 8H+ $$\to$$ Mn2+ + 4H2O + 5Fe3+
A
Yellow, Orange
B
Yellow, Green
C
Green, Orange
D
Green, Yellow
2
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :
A
2 enantiomers and 2 mesomers
B
2 identical mesomers
C
2 enantiomers
D
1 racemic and 2 enantiomers
3
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Hydrogen peroxide reacts with iodine in basic medium to give :
A
IO$$_4^ - $$
B
IO$$-$$
C
I$$-$$
D
IO$$_3^ - $$
4
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the following sequence of reactions,

JEE Main 2021 (Online) 1st September Evening Shift Chemistry - Haloalkanes and Haloarenes Question 63 English
The compounds B and C respectively are :-
A
CI3COOK, HCOOH
B
CI3COOK, CH3I
C
CH3I, HCOOK
D
CHI3, CH3COOK
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