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.

HF has highest boiling point among hydrogen halides, because it has:

• Strongest van der Waal’s interactions

• Lowest ionic character

• Strongest hydrogen bonding

• Lowest dissociation enthalpy

Among the following molecules/ ions, 

${\mathrm{C}}_2^{2-}, {\mathrm{N}}_2^{2-}, {\mathrm{O}}_2^{2-}, {\mathrm{O}}_2$

Which one is diamagnetic and has the shortest bond length?

• ${\mathrm{O}}_2^{2-}$

• C${}_2^{2-}$

• N${}_2^{2-}$

• O₂

645.

The correct statement among I to III are:

(I) Valence bond theory cannot explain the color exhibited by transition metal complexes.

(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.

(III) Valence bond theory cannot distinguish ligands as weak and strong field ones.

• (I) and (III) only

• (II) and (III) only

• (I), (II) and (III)

• (I) and (II) only

The ion that has sp³d² hybridization for the central atom, is:

• [ICl₄]^-

• [ICl₂]^-

• [IF₆]^-

• [BrF₂]^-

During the change of O₂ to O${}_2^{-}$, the incoming electrons goes to the orbital;

• π^*2P_x

• π2P_x

• σ*2P_x

• π2P_y

Predict the correct order among the following.

• long pair-lone pair> bond pair-bond pair> lone pair>bond pair

• bond pair-bond pair> lone pair-bond pair > lone pair -lone pair

• lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

• lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

The pair of an electron in the given carbanion, is present in which orbital? 

• sp³

• sp²

• sp

• sp

Consider the molecules CH₄, NH₃ and H₂O. Which of the given statement is false?

• The H-O-H bond angle in H₂O  is larger than the H-C-H bond angle in CH₄.

• The H-O-H bond angle in H₂O is smaller than the H-N-H bond angle in NH₃.

• The H-C-H bond angle in CH₄ is larger than the H-N-H bond angle in NH₃

• The H-C-H bond angle in CH₄ is larger than the H-N-H bond angle in NH₃