Which one of the following has the regular tetrahedral structure?

• XeF₄

• [Ni(CN)₄]^2-

• BF₄^-

• BF₄^-

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

• (n -1)d⁸ ns²

• (n-1)d⁵ ns²

• (n-1)d³ ns²

• (n-1)d³ ns²

The maximum number of 90° angles between bond pair of electrons is observed in

• dsp³ hybridization

• sp³d² hybridization

• dsp² hybridization

• dsp² hybridization

According to molecular orbital theory, which of the following will not be a viable molecule?

• $H_2^{2-}$

• $H{e}_2^{2+}$

• $H{e}_2^{+}$

• $H_2^{-}$

Which of the following compounds contain(s) no covalent bond(s)?
KCl, PH₃, O2, B₂H₆, H₂SO₄

• KCl, B₂H₆

• KCl, B₂H₆, PH₃

• KCl, H₂SO₄

• KCl

Total number of lone pair of electrons in  I₃^- ion is

• 12

• 3

• 6

• 9

Among Me₃N, C₅H₅N and MeCN (Me = methyl group) the electronegativity of N is in the order

• MeCN > C₅H₅N > Me₃N

• C₅H₅N > Me₃N > MeCN

• Me₃N > MeCN > C₅H₅N

• Electronegativity same in all

38.

The shape of XeF${}_5^{-}$ will be

• square pyramid

• trigonal bipyramidal

• planar

• pentagonal bipyramid

The ground state magnetic property of B₂ and C₂ molecules will be

• B₂ paramagnetic and C₂ diamagnetic

• B₂ diamagnetic and C₂ paramagnetic

• Both are diamagnetic

• Both are paramagnetic

The correct order of O-O bond lenght in O_2, H₂O_2, and O₃

• O₂> O₃> H₂O₂

• H₂O₂ > O₃ > O₂

• O₃> O₂> H₂O₂

• O₃ > H₂O₂> O₂