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1.
Which of the following shows minimum melting point?
2.
Which of the following does not have a lone pair on the central atom?
3.
Molecular orbital theory was given by
4.
has a net dipole moment, but boron trifluoride 
has zero dipole moment, because:
has a net dipole moment, but boron trifluoride has zero dipole moment, because:
5.
Proton plays an important role in...bonding.
6.
Which represents a collection of isoelectronic species?
7.
An electrovalent compound does not exhibit space isomerism due to:
8.
In which molecule Sulphur atom is not 
-hybridized?
-hybridized?
9.
In which one of the following species, the central atom has the type of hybridization which is not the same as that present in other three?
10.
The radii of 
and 
are in the order of:
and are in the order of: