Chemical Bonding and Molecular Structure

Which one of the following has (have) octahedral geometry?

(i) SbCl${}_6^{-}$

(ii) SnCl${}_6^{2-}$

(iii) XeF₆

(iv) IO${}_6^{5-}$

• (i), (ii) and (iv)

• (ii), (iii) and (iv)

• (i), (ii) and (iii)

• All of these

Number of bonding electron pairs and number of lone pairs of electrons in ClF₃, SF₄, BrF₅ respectively are

• 3, 2, 4, 2, 5, 2

• 3, 1, 4, 1,5, 2

• 3, 1, 4, 2, 5, 1

• 3, 2, 4, 1, 5, 1

What is the bond order of N₂ ?

• 3

• 4

• 2

• 1

The hybridisation of each carbon in the following compound respectively is CH₃-CO-CH₂CN

• sp³,sp²,sp³,sp

• sp³,sp³,sp²,sp

• sp³,sp²,sp, sp³

• sp²,sp, sp³, sp³

The paramagnetic species is

• SiO₂

• TiO₂

• BaO₂

• KO₂

In terms of polar character which one of the following orders is correct?

• H₂S < NH₃ < H₂O < HF

• H₂O < NH₃ < H₂S < HF

• HF < H₂O < NH₃ < H₂S

• NH₃ < H₂O < HF < H₂S

The bond lenght (pm) of F₂, H₂, Cl₂ and I₂, respectively is:

• 144, 74, 199, 267

• 74, 144, 199, 267

• 74, 267, 199, 144

• 144, 74, 267, 199

Which one of the following statement is correct for d⁴ ions [ P = pairing energy]

• When Δ₀ > P, low-spin complex form

• When Δ₀ < P, low-spin complex form

• When Δ₀ > P, high-spin complex form

• When Δ₀ > P, both high and low-spin complex form

The species having pyramidal shape according to VSEPR theory is

• SO₃

• BrF₃

• SiO${}_3^{2-}$

• OsF₂

The correct statement about ICl₅ and ICl${}_4^{-}$ is:

• ICl₅ is trigonal bipyramidal and ICl${}_4^{-}$ is tetrahedral

• ICl₅ is square pyramidal and ICl${}_4^{-}$ is tetrahedral

• both are isostructural

• ICl₅ is square pyramidal and ICl${}_4^{-}$ is square planar.