1
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following lanthanoids does not form MO2? [M is lanthanoid metal]
A
Nd
B
Dy
C
Yb
D
Pr
2
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements :

Statement I : CeO2 can be used for oxidation of aldehydes and ketones.

Statement II : Aqueous solution of EuSO4 is a strong reducing agent.

In the light of the above statements, choose the correct answer from the options given below :
A
Statement I is true but Statement II is false.
B
Statement I is false but Statement II is true
C
Both Statement I and Statement II are false
D
Both Statement I and Statement II are true
3
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following pairs, the outer most electronic configuration will be the same?
A
Cr+ and Mn2+
B
Ni2+ and Cu+
C
V2+ and Cr+
D
Fe2+ and Co+
4
JEE Main 2021 (Online) 24th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The incorrect statement among the following is :
A
RuO4 is an oxidizing agent
B
Cr2O3 is an amphoteric oxide.
C
VOSO4 is a reducing agent
D
Red colour of ruby is due to the presence of Co3+
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