1
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The oxide that shows magnetic property is :
A
MgO
B
SiO2
C
Mn3O4
D
Na2O
2
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the reaction of hypobromite with amide, the carbonyl carbon is lost as :
A
CO2
B
CO
C
HCO$$_3^ - $$
D
CO$$_3^{2 - }$$
3
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO4 . 5H2O, respectively, are :
A
5 and 1
B
4 and 1
C
6 and 5
D
6 and 4
4
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. The elements X, Y and Z, respectively, are :
A
neon, sodium and chlorine
B
argon, chlorine and sodium
C
chlorine, lithium and sodium
D
argon, lithium and sodium
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