1
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
C60 an allotrope of carbon contains :
A
12 hexagons and 20 pentagons.
B
20 hexagons and 12 pentagons.
C
16 hexagons and 16 pentagons
D
18 hexagons and 14 pentagons.
2
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Diborane (B2H6) reacts with O2 and H2O independently, then products formed are :
A
B2O3 and HBO2
B
B2O3 and H3BO3
C
HBO2 and H3BO3
D
HBO2 and HBO3
3
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The element that does NOT show catenation is :
A
Ge
B
Si
C
Sn
D
Pb
4
JEE Main 2019 (Online) 12th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The element that shows greater ability to form p$$\pi $$-p$$\pi $$ multiple bonds, is :
A
Si
B
Ge
C
C
D
Sn
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