The C-H bond and C-C bond in ethane are formed by which of the following types of overlap?

• sp²-s and sp²-sp²

• sp-s and sp-sp

• p-s and p-p

• sp³-s and sp³-sp³

Which one of the following has a magnetic moment of.1.75 BM?

• V³⁺

• Cr³⁺

• Fe³⁺

• Ti³⁺

Which one of the following contains ionic, covalent and coordinate bonds?

• NaCl

• NaCN

• NaNC

• NaOH

Which one of the following is not true regarding electromeric effect?

• It is a temporary effect

• It operates on multiple bonds

• It requires an attacking reagent

• It results in the appearance of partial charges on the carbon atoms

d²sp³ hybridisation of the atomic orbitals gives

• square planar structure

• triangular structure

• tetrahedral structure

• octahedral structure

A group of atoms can function as a ligand only when

• It is a small molecule

• It has an unshared electron pair

• Its a negatively charged ion

• It is a positively charge ion

Which of the following is diamagnetic?

• H${}_2^{+}$

• He${}_2^{+}$

• O₂

• N₂

The number of anti-boinding electron present in O${}_2^{+}$ molecular ion is

• 8

• 6

• 5

• 4

The pair of compounds having identical shapes for their molecules is

• CH₄, SF₄

• BCl₃, ClF₃

• XeF₂, ZnCl₂

• SO₂, CO₂

290.

The correct arrangement for the ions in the increasing order of their radii is

• Na⁺, Cl^-, Ca²⁺

• Ca²⁺, K⁺, S^2-

• Na⁺, Al³⁺, Be²⁺

• Cl^-, F^-, S^2-