In which of the following species, d-orbitals having xz and yz two nodal planes involved in hybridization of central atom?

(a) ${\mathrm{IO}}_2{\mathrm{F}}_2^{-}$                                  (b) ${\mathrm{ClF}}_4^{-}$

(c) ${\mathrm{IF}}_7$                                       (d) None of these 

Select pair of compound in which both have differant hybridization but have same molecular geomatery:

(1)  $B{F}_{3,}Br{F}_3$       

(2) $IC{I}_2,BeC{I}_2$   

(3)$BC{I}_{3,}PC{I}_3$   

(4) $PC{I}_{3,}NC{I}_3$

Which of the following molecules does not exist?

1. $O{F}_2$

2. $O{F}_4$

3. $S{F}_2$

4. $S{F}_4$

The species having no p$\mathrm{\pi }$-p$\mathrm{\pi }$ bond but has a bond order equal to that of $O_2$

(a) $CIO\underset{3}{-}$     

(b) $P{O_4}^{3-}$   

(c)$S{O_4}^{2-}$   

(d) $Xe{O}_3$

Which pair of atom form strongest ionic bond?

(1) Al and As

(2) Al and N

(3) Al and Se

(4) AL and O

The correct order of increasing s-character (in percentage) in the hybrid orbitals of the following molecules/ions is:

How many possible resonance forms exist for the nitrate ion, \(\text{NO}_3^-\)​?

Which of the following molecule will have all equal $\mathrm{X}—\mathrm{F}$ bond length? (where X= central atom)

$$\begin{gathered} \left(\mathrm{a}\right) {\mathrm{SOCl}}_2{\mathrm{F}}_2 \\ \left(\mathrm{b}\right) {\mathrm{SeF}}_4 \\ \left(\mathrm{c}\right) {\mathrm{PBr}}_2{\mathrm{F}}_3 \\ \left(\mathrm{d}\right) {\mathrm{IF}}_7 \end{gathered}$$

Which of the following fact is directly explained by the statement 'oxygen is a smaller atom than sulpher'?

(1) $H_{2}O$ boils at a much higher tempreture than $H_{2}S$

(2) $H_{2}S$ undergoes intermolecure hydrogen bonding

(3) $H_{2}O$ is liquid and $H_{2}S$ is gas at room tempreture 

(4) S$—$H bond is longer than O$—$H bond

Among given species identify the isostructural pairs:

(1) $\left[N{F}_{3 } and B{F}_3\right]$

(2) $\left[B{F_4}^{-} and N{H_4}^{+}\right]$

(3) $\left[BC{l}_3 and BrC{l}_3\right]$

(4) $\left[N{H}_3 and N{O_3}^{-}\right]$