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1
JEE Main 2021 (Online) 31st August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the structure of the dichromate ion, there is a :
A
linear symmetrical Cr-O-Cr bond.
B
non-linear symmetrical Cr-O-Cr bond.
C
linear unsymmetrical Cr-O-Cr bond.
D
non-linear unsymmetrical Cr-O-Cr bond.
2
JEE Main 2021 (Online) 31st August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature? (Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58)
A
Nd
B
Yb
C
La
D
Ce
3
JEE Main 2021 (Online) 27th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The addition of dilute NaOH to Cr3+ salt solution will give :
A
a solution of [Cr(OH)4]$$-$$
B
precipitate of Cr2O3(H2O)n
C
precipitate of [Cr(OH)6]3$$-$$
D
precipitate of Cr(OH)3
4
JEE Main 2021 (Online) 27th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Potassium permanganate on heating at 513 K gives a product which is :
A
paramagnetic and colourless
B
diamagnetic and green
C
diamagnetic and colourless
D
paramagnetic and green
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