Bond order of which among the following molecules is zero?

• F₂

• O₂

• Be₂

• Li₂

362.

Select a ferromagnetic material from the following.

• Dioxygen

• Chromium (IV) oxide

• Benzene

• Dihydrogen monoxide

Which element among the following does form p$\mathrm{\pi }$ - p$\mathrm{\pi }$ multiple bonds?

• Arsenic

• Nitrogen

• Phosphorus

• Antimony

The colour and magnetic nature of manganate ion (MnO${}_4^{2-}$) is

• green, paramagnetic

• purple, diamagnetic

• green, diamagnetic

• purple, paramagnetic

What is the hybridisation of carbon atoms in fullerene?

• sp³

• sp

• sp²

• dsp³

Among the following, the molecule that will have the highest dipole movement is

• H₂

• HF

• HBr

• HCl

Which of the following pair have identical bond order?

• CN^- and NO⁺

• CN^- and O${}_2^{-}$

• CN^- and CN⁺

• NO⁺ and O${}_2^{-}$

Hybridisation of carbon is CH${}_3^{-}$

• sp²

• sp³

• sp³d

• sp³d²

The common features among CO, CN^- and NO${}_2^{+}$ are

• Bond order three and isoelectronic.

• Bond order three and weak field ligands.

• Bond order two and $\mathrm{\pi }$-acceptors.

• Bond order three and $\mathrm{\pi }$-donors.

Identify the T-shaped molecule from the following.

• BF₃

• NH₃

• NF₃

• CIF₃