1
IIT-JEE 1981
MCQ (Single Correct Answer)
+1
-0.25
If a molecule MX3 has zero dipole moment, the sigma bonding orbitals used by M (atomic number < 21) are
A
pure p
B
sp hybrid
C
sp2 hybrid
D
sp3 hybrid
2
IIT-JEE 1980
MCQ (Single Correct Answer)
+2
-0.5
Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound formed would be
A
X+Y-
B
X-X+
C
X-Y
D
X $$\to$$ Y
3
IIT-JEE 1980
MCQ (Single Correct Answer)
+2
-0.5
Which of the following compounds are covalent?
A
H2
B
CaO
C
KCl
D
Na2S
4
IIT-JEE 1980
MCQ (Single Correct Answer)
+2
-0.5
The total number of electrons that take part in forming the bond in N2 is
A
2
B
4
C
6
D
10
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