1

### IIT-JEE 2001 Screening

The common features among the species CN-, CO and NO+ are
A
bond order three and isoelectronic
B
bond order three and weak field ligands
C
bond order two and $\pi$-acceptors
D
isoelectronic and weak field ligands
2

### 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
3

### 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
4

### 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