1
JEE Main 2021 (Online) 25th February Morning Slot
MCQ (Single Correct Answer)
+4
-1
The correct statement about B2H6 is :
A
Its fragment, BH3, behaves as a Lewis base.
B
All B$$-$$H$$-$$B angles are of 120$$^\circ$$.
C
The two B$$-$$H$$-$$B bonds are not of same length.
D
Terminal B$$-$$H bonds have less p-character when compared to bridging bonds.
2
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
The reaction of NO with N2O4 at 250 K gives :
A
N2O3
B
N2O5
C
N2O
D
NO2
3
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Reaction of an inorganic sulphite X with dilute H2SO4 generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and Z, respectively, are :
A
S and Na2SO3
B
SO2 and NaHSO3
C
SO2 and Na2SO3
D
SO3 and NaHSO3
4
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
The correct statement with respect to dinitrogen is :
A
N2 is paramagnetic in nature
B
it can be used as an inert diluent for reactive chemicals
C
it can combine with dioxygen at 25oC
D
liquid dinitrogen is not used in cryosurgery
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