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

632.

Among the following compounds of boron, the species which also forms $\mathrm{\pi }$-bond in addition to σ-bonds is

• BH₃

• B₂H₆

• BF₃

• BF${}_4^{-}$

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

Match the following

List I	List II
(a) PCl3	(i) Square planar
(b) BF3	(ii) T-shape
(c) ClF3	(iii) Trigonal pyramidal
(d) XeF4	(iv) See- saw
	(v) Trigaonal planar

• (a)    (b)  (c)  (d)
  (iv)   (ii)   (i)    (iii)

• (a)    (b)   (c)    (d)
  (iii)   (v)   (ii)    (iv)

• (a)  (b)    (c)   (d)
  (iii)   (v)   (ii)   (i)

• (a)   (b)   (c)    (d)
  (iii)   (v)   (ii)   (v)

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