The correct order of C-O bond length among CO, CO₃^2-, CO₂ is,

• CO₂<  CO₃^2-<  CO

• CO <  CO₃^2-<  CO₂

• CO₃^2- <CO₂ <CO

• CO₃^2- <CO₂ <CO

In which of the following pairs, the two species are isostructural?

• SF₄ and XeF₄

• SO₃^2- and NO₃^-

• BF₃ and NF₃

• BF₃ and NF₃

In which of the following molecules are all the bonds not equal? 

• ClF₃

• BF₃

• AlF₃

• AlF₃

Which of the following is not isostructural with SiCl₄?

• SCl₄

• 
  SO₄^2-

• PO₄^3- 

• PO₄^3- 

With respect to the conformers of ethane, which of the following statements is true?

• Bond angle remains same but bond length changes

• Bond angle changes but bond length remains same

• Both bond angle and bond length change

• Both bond angle and bond length change

Which of the following pairs of compounds is isoelectronic and isostructural?

• BeCl₂, XeF₂

• Tel₂, XeF₂

• IBr₂^- , XeF 

• IBr₂^- , XeF 

427.

Match the interhalogen compounds of column I with the geometry in column II and assign the correct code

Column I	Column II
a) XX'	(i) T-shape
b) XX3'	(ii) Pentagonal bipyramidal
c) XX'5	(iii) Linear
d) XX'7	(iv) Square-pyramidal
	(v) Tetrahedral

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

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

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

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

Which of the following is least soluble in water?

• C₂H₆

• CH₃OH

• CH₃NH₂

• C₆H₅OH

Among the following compounds, which compound is polar as well as exhibit sp²-hybridisation by the central atom.

• H₂CO₃

• SiF₄

• BF₄

• HClO₃

Choose the correct statement from the following

• ${\mathrm{NH}}_4^{+}$ and CH₄ are not isoelectronic species

• BF₃ does not have dipole moment

• O - Cl - O obeys octet rule

• O^- in O₃ is Sp³-hybridised