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1.
The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is:
2.
The molecule which has T – shaped structure is
3.
As a result of resonance:
4.
The pair of species with the same bond order is:
5.
Which of the following molecules has pentagonal bipyramidal shape?
6.
The number of types of bonds between two carbon atoms in calcium carbide is
7.
The bond angle between 
—
— in ice is closest to:
—— in ice is closest to:
8.
If a molecule 
has zero dipole moment the sigma bonding orbitals used by 
(at. No. < 21) is:
has zero dipole moment the sigma bonding orbitals used by (at. No. < 21) is:
9.
Which combination of atoms can form a polar covalent bond?
10.
The bond strength in 
and 
follows the order:
and follows the order: