In the molecule O_A = C = O_B, the formal charge on O_A, C and O_B are respectively.

(a)

-1, 0, +1

(b)

+1, 0, -1

(c)

-2, 0, +2

(d)

0, 0, 0

Which of the following molecule contain no л bond ?

(a)

SO₂

(b)

NO₂

(c)

CO₂

(d)

H₂O

Which one of the following is the likely bond angles of sulphur tetrafluoride molecule ?

(a)

120^o,80^o

(b)

109^o,28

(c)

90^o

(d)

89^o,117^o

According to Valence bond theory, a bond between two atoms is formed when _____________

(a)

fully filled atomic orbitals overlap

(b)

half filled atomic orbitals overlap

(c)

non- bonding atomic orbitals overlap

(d)

empty atomic orbitals overlap

When one s and three p orbitals hybridise,

(a)

four equvivalent orbitals at 90^o to each other will be formed

(b)

four equvivalent orbitals at 109^o 28' to each other will be formed

(c)

four equivalent orbitals, that are lying the same plane will be formed

(d)

none of these