What is the principal energetic factor in the lack of miscibility between $C_6{H}_{14}\left(l\right)$ and $H_{2}O\left(l\right)$?

1.  The strength of intermolecular forces of attraction between $C_6{H}_{14}\left(l\right)$ molecules

2.  The strength of intermolecular forces of attraction between $H_{2}O\left(l\right)$ molecules

3.  The differences between the molecular weights of the molecules

4.  The difference in electronegativity between carbon and hydrogen

The value of 'x' in ${\left({\mathrm{NH}}_4\right)}_2 \mathrm{Fe}{\left({\mathrm{SO}}_4\right)}_{\mathrm{x}}.6{\mathrm{H}}_2\mathrm{O}$ is

1.  1

2.  2

3. 3

4.  4

The correct structure of $Cl{F}_3$ is:

1.		2.
3.		4.

Select the correct statement regarding $Xe{O}_2{F}_2$ among the folowing.

a.  Xe is $s{p}^{3}d$ hybridised.

b.  4 bond pairs and 1 lone pair are present around Xe.

c.  Shape of $Xe{O}_2{F}_2$ is square pyramidal.

d.  Contains $\mathrm{d\pi }-p\pi$ bonds.

1.  a and b

2.  a,  and d

3.  a, b and d

4.  b, c and d

Consider the following compounds:
$LiCl, BeF_2, BCl_3, IF_7, CH_4, SF_6, PCl_5$
How many of these compounds have an expanded octet around the central atom?

1.  2

2.  4

3.  2

4.  3

Which of the following atomic orbitals will show zero overlaps? (consider x-axis as the molecular axis)

1.  $P_x, P_x$

2.  $P_y, P_y$

3.  $P_y, P_z$

4.  $P_x, s$

The lattice energies of NaCl, NaF, KCl, and RbCl follow the order:

1.  KCl < RbCl < NaCl < NaF

2.  NaF < NaCl < KCl < RbCl

3.  RbCl < KCl < NaCl < NaF

4.  NaCl < RbCl < NaF < KCl

Which of the following molecules has the maximum covalent character?

1. NaH

2. ${\mathrm{Na}}_2\mathrm{S}$

3. ${\mathrm{CaCl}}_2$

4. ${\mathrm{SnCl}}_4$

Identify the species in which the central atom exhibits $sp^2$ hybridization:

1. $PH_3$
2. $NH_3$
3. $CH_3^+$
4. $SbH_3$