1

### IIT-JEE 2000 Screening

The hybridisation of atomic orbitals of nitrogen in $NO_2^+$, $NO_3^-$ and $NH_4^+$ are
A
sp, sp3 and sp2 respectively
B
sp, sp2 and sp3 respectively
C
sp2, sp and sp3 respectively
D
sp2, sp3 and sp respectively
2

### IIT-JEE 2000 Screening

Molecular shape of SF4, CF4 and XeF4 are
A
the same, with 2, 0 and 1 lone pair of electrons
B
the same, with 1, 1 and 1 lone pair of electrons
C
different, with 0, 1 and 2 lone pairs of electrons respectively
D
different, with 1, 0 and 2 lone pairs of electrons respectively
3

### IIT-JEE 1999

The geometry of H2S and its dipole moment are
A
angular and non-zero
B
angular and zero
C
linear and non-zero
D
linear and zero
4

### IIT-JEE 1999

The correct order of increasing C - O bond length of CO, $CO_3^{2-}$, CO2 is
A
$CO_3^{2-}$ < CO2 < CO
B
CO2 < $CO_3^{2-}$ < CO
C
CO < $CO_3^{2-}$ < CO2
D
CO < CO2 < $CO_3^{2-}$