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:

Which molecule does not exist?

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

Which pair of atom form strongest ionic bond?

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

(i) ${\mathrm{CO}}_3^{2-}$           (ii) ${\mathrm{XeF}}_4$                (iii) ${\mathrm{I}}_3^{-}$                     (iv) ${\mathrm{NCl}}_3$                         (v) ${\mathrm{BeCl}}_2$

The total number of possible resonance forms for the nitrate ion, ($\mathrm{N}{{\mathrm{O}}_3}^{-}$) is: 

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'?

Among given species identify the isostructural pairs:

Consider the following information (X=F or Cl)

Molecule     P-X(axial)       P-X(Equitorial) 

                 bond length     bond length

PF_{5                     a                        b}

PF₄CH_{3            c                        d}

PF₃(CH₃)_{2       e                       f}

PCl_{5                   g                      h}

According to information choose the incorrect order of bond length :

In which of the following cases $\mathrm{C}—\mathrm{C}$ bond length will be highest?

The ratio of $\mathrm{\sigma } / \mathrm{\pi } \mathrm{bond}$ in tetracyano ethylene is: 

Which of the following statement is correct in the context of the allene molecules, $C_3{H}_4$?

Select the incorrect statement about ${\mathrm{N}}_2{\mathrm{F}}_{4 }\mathrm{and} {\mathrm{N}}_2{\mathrm{H}}_4$:

(i) In${\mathrm{N}}_2{\mathrm{F}}_4$, d-orbitals are contracted by electronegative fluorine atoms, but d-orbitals contaraction is not possible by H-atom in ${\mathrm{N}}_2{\mathrm{H}}_4$

(ii) The N-N bond energy in ${\mathrm{N}}_2{\mathrm{F}}_4$ is lesser than N-N bond energy in ${\mathrm{N}}_2{\mathrm{H}}_4$

(iii) The N-N bond length in ${\mathrm{N}}_2{\mathrm{F}}_4$ is more than that in ${\mathrm{N}}_2{\mathrm{H}}_4$

(iv) The N-N bond length in ${\mathrm{N}}_2{\mathrm{F}}_4$ is less than that in ${\mathrm{N}}_2{\mathrm{H}}_4$

Choose the correct code:

(a) (i),(ii) and (iii)                                        (b) (i) and (iii)

(c) (ii) and (iv)                                            (d) (ii) and (iii)

The shape of $\mathrm{Xe}{{\mathrm{F}}_3}^{+}$ is :

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

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

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

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

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

The bond length of the S$—$O bond in maximum in which of the following compounds?

Out of the two compounds shown below, the vapour pressure of B at a particular temperature is expected to be :

(A)  and (B) 

Solubillity of alkali metal fluorides increases down the group select correct explanation for given statement :

Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of $B{F}_3$ and $N{H}_3$:

Assuming $2s-2p$ mixing is NOT operative, the paramagnetic species among the following is :

$Sb{F}_5$ 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 :

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

The geometry of ammonia molecule can be best described as:

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