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The bond angle between two hybrid orbitals is ${105}^{°}$. The % s character in orbital is-

$PC{l}_5$ exists but $NC{l}_5$ does not because:
1. Nitrogen has no vacant d-subshells .
2. $NC{l}_5$ is unstable .
3. Nitrogen atom is much smaller than p .
4. Nitrogen is highly inert . 

Polarization of electrons in acrolein may be written as: 
(a) $\stackrel{{\delta }^{-}}{C}{H}_2=CH-\stackrel{{\delta }^{+}}{C}H=O$
(b)$\stackrel{{\delta }^{-}}{C}{H}_2=CH-CH=\stackrel{{\delta }^{+}}{O}$
(c) $\stackrel{{\delta }^{-}}{C}{H}_2=\stackrel{{\delta }^{+}}{C}H-CH=O$
(d) $\stackrel{{\delta }^{+}}{C}{H}_2=CH-CH=\stackrel{{\delta }^{-}}{O}$

The species among the following that does not exist is-
1. ${\left(\mathrm{Sn}{F}_6\right)}^{2-}$
2. ${\left({\mathrm{GeCl}}_6\right)}^{2-}$
3. ${\left({\mathrm{CCl}}_6\right)}^{2-}$
4. ${\left({\mathrm{SiF}}_6\right)}^{2-}$

If ${\mathrm{CdI}}_2$ is pink in colour, the ${\mathrm{CdCl}}_2$ will be '.............' coloured.
(1) yellow         
(2) red                 
(3) blue                   
(4) cannot be predicted

The species showing $p\pi$-$d\pi$  overlapping is :
1. $N{O_3}^{-}$
2. $P{O_4}^{3-}$
3. $C{O_3}^{2-}$
4. $N{O_2}^{-}$

A compound having a metal-to-metal bond is:
1. Cupric chloride           
2. Stannous chloride
3. Mercurous chloride     
4. Mercuric chloride

Which of the following orbital can not form $\mathrm{\pi }$ as well as $\delta$-bond?
(1) $d_{xy}$                    (2) $d_{z^2}$
(3) $d_{x^2-y^2}$               (4) $d_{yz}$

Which molecule does not exist?
1. $O{F}_2$
2. $O{F}_4$
3. $S{F}_2$
4. $S{F}_4$

Aqueous solution of which of the following compounds is the best conductor of electric
current?
1. Acetic acid, C₂H₄O₂
2. Hydrochloric acid, HCl
3. Ammonia, NH₃
4. Fructose, C₆H₁₂O₆

Predict the correct order among the following.
(1) lone pair-lone pair>bond pair-bond pair>lone pair-bond pair
(2) bond pair-bond pair>lone pair-bond pair>lone pair-lone pair
(3) lone pair-bond pair>bond pair-bond pair>lone pair-lone pair
(4) lone pair-lone pair>lone pair-bond pair>bond pair-bond pair

The species, having bond angles of 120° is : 
1. PH₃ 
2. ClF₃
3. NCl₃
4. BCl₃

Which of the following leads to bonding orbital?

1.		2.
3.		4.

The isostere pair is
1. CO₂ and N₂O
2. CO and N₂
3. O₂ and NO₂
4. Both (1) and (2)

In which case observed dipole moment is greater than theoretical dipole moment?
1.
2.
3.
4.

The number of sigma bonds in P₄O₁₀ is 
1. 6
2. 16
3. 20
4. 7

In an octahedral structure, the pair of d orbitals involved in d²sp³-hybridisation is
1. $d_{x^2-y^2}, d_{z^2}$
2. $d_{xy}, d_{x^2\mathit{-}{y}^{\mathit{2}}}$
3. $d_{{\mathrm{z}}^2}, d_{xz}$
4. $d_{xy}, d_{yz}$