1

### JEE Advanced 2015 Paper 1 Offline

Numerical
Among the triatomic molecules/ions, BeCl2, $N_3^-$, N2O, $NO_2^+$, O3, SCl2, $ICl_2^-$, $I_3^-$ and XeF2, the total number of linear molecule(s)/ion(s) where the hybridization of the central atom does not have contribution from the d-orbital(s) is

[Atomic number: S = 16, Cl = 17, I = 53 and Xe = 54]

2

### JEE Advanced 2014 Paper 1 Offline

Numerical
A list of species having the formula XZ4 is given below.

XeF4, SF4 ,SiF4, $BF_4^-$, $BrF_4^-$, [Cu(NH)3]2+, [FeCl4]2-, [CoCl4]2- and [PtCl4]2-

Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is

3

Numerical
The total number of lone-pairs of electrons in melamine is

4

### IIT-JEE 2010

Numerical
Based on VSEPR theory, the number of 90 degree F-BR-F angles in BrF5 is