1
JEE Main 2021 (Online) 27th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The nature of oxides V2O3 and CrO is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is :
A
X = basic Y = amphoteric
B
X = amphoteric Y = basic
C
X = acidic Y = acidic
D
X = basic Y = basic
2
JEE Main 2021 (Online) 26th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere?
A
CuCl2
B
AgCl
C
ZnCl2
D
Cu2Cl2
3
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The spin only magnetic moments (in BM) for free Ti3+, V2+ and Sc3+ ions respectively are :

(At.No. Sc : 21, Ti : 22, V : 23)
A
3.87, 1.73, 0
B
1.73, 3.87, 0
C
1.73, 0, 3.87
D
0, 3.87, 1.73
4
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following metals forms interstitial hydride easily?
A
Cr
B
Fe
C
Mn
D
Co
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