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1
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The common positive oxidation states for an element with atomic number 24, are :
A
+1 and +3
B
+2 to +6
C
+1 to +6
D
+1 and +3 to +6
2
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous solution?
A
zero
B
5.26
C
5.0
D
5.92
3
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements :

Statement I : Potassium permanganate on heating at 573K forms potassium manganate.

Statement II : Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.

In the light of the above statements, choose the most appropriate 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
4
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Fex2 and Fey3 are known when x and y are :
A
x = F, Cl, Br, I and y = F, Cl, Br, I
B
x = F, Cl, Br and y = F, Cl, Br, I
C
x = F, Cl, Br, I and y = F, Cl, Br
D
x = Cl, Br, I and y = F, Cl, Br, I
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