1
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following gives the most stable Diazonium salt?
A
CH3$$-$$CH2$$-$$CH2$$-$$NH2
B
JEE Main 2021 (Online) 1st September Evening Shift Chemistry - Compounds Containing Nitrogen Question 93 English Option 2
C
JEE Main 2021 (Online) 1st September Evening Shift Chemistry - Compounds Containing Nitrogen Question 93 English Option 3
D
JEE Main 2021 (Online) 1st September Evening Shift Chemistry - Compounds Containing Nitrogen Question 93 English Option 4
2
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The potassium ferrocyanide solution gives a Prussian blue colour, when added to :
A
CoCl3
B
FeCl2
C
CoCl2
D
FeCl3
3
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Number of paramagnetic oxides among the following given oxides is ____________.

Li2O, CaO, Na2O2, KO2, MgO and K2O
A
1
B
2
C
3
D
0
4
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d5 :
A
Ru
B
Mn
C
Co
D
Fe
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