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1
JEE Main 2021 (Online) 25th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Al2O3 was leached with alkali to get X. The solution of X on passing of gas Y, forms Z. X, Y and Z respectively are :
A
X = Na[Al(OH)4], Y = CO2, Z = Al2O3.xH2O
B
X = Al(OH)3, Y = CO2, Z = Al2O3
C
X = Al(OH)3, Y = SO2, Z = Al2O3.xH2O
D
X = Na[Al(OH)4], Y = SO2, Z = Al2O3
3
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The reaction of NO with N2O4 at 250 K gives :
A
N2O3
B
N2O5
C
N2O
D
NO2
4
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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
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