Which of the following shape are not possible for possible value of 'n' in $XeFn$ molecule?

(1) Linear 

(2) Square planar 

(3) Trigonal planar

(4) Capped octahedral

Which of the following compound has a maximum "C$—$C" single bond length?

1. CH₂CHCCH        
2. HCCCCH  
3. CH₃CHCH₂        
4. CH₂CHCHCH₂

$BeC{l}_2$ is not isostructural with :

(1)$IC{l_2}^{-}$

(2) $C_2{H}_2$

(3) $Xe{F}_2$

(4) $GeC{l}_2$

Which statement is true about the most stable Lewis structure for $C{S}_2$ ?

(1) There are no lone pairs in molecule 

(2) All bonds are double bonds 

(3) The central atom does not have an octet of electrons 

(4) A sulfur atom must be the central atom for the stucture to be stable 

Minimum $\mathrm{F}—\mathrm{S}—\mathrm{F}$ bond angle present in:

1. ${\mathrm{SSF}}_{2 }$                                                     

2. ${\mathrm{SF}}_6$

3. ${\mathrm{SF}}_2$                                                       

4. ${\mathrm{F}}_3\mathrm{SSF}$

$Sb{F}_5$ reacts with $Xe{F}_4$ and $Xe{F}_6$ to form ionic compounds $\left[Xe{F_3}^{+}\right]$ $\left[Sb{F_6}^{-}\right]$ and $\left[Xe{F_5}^{+}\right]$ $\left[Sb{F_6}^{-}\right]$ then molecular shape of $\left[Xe{F_3}^{+}\right]$ ion and $\left[Xe{F_5}^{+}\right]$ ion respectively :

(1) Square pyramidal, T-shaped 

(2) Bent T-shape, Square pyramidal

(3) See- saw , square pyramidal 

(4) Square pyramidal , See-saw

In which of the following species maximum atom can lie in same plane? 

1. XeF₂O₂

2. $PC{l}_5$

$\mathrm{3.\; A}s{H_4}^{+}$

4. $Xe{F}_4$

The geometry of ammonia molecule can be best described as:

(1) Nitrogen at one vertex of a regular tetrahedron, the other three vertices being occupied by three hydrogens 

(2) Nitrogen at the centre of the tetrahedron, three vertics being occupied by three hydrogens

(3) Nitrogen at the centre of an equilateral triangle, three corners being occupied by three hydrogens 

(4) Nitrogen at the junction of a T, three open ends being occupied by three hydrogens  

The molecular geometry that is least likely to result from a trigonal bipyramidal electron geometry is:

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) $d_{yz}$