Chapter 3

Which of the following has sp \(^{3}\) hybridization of central atom? (a) \(\mathrm{XeO}_{3}\) (b) \(\mathrm{BCl}_{3}\) (c) \(\mathrm{XeF}_{4}\) (d) \(\mathrm{BBr}_{3}\)

The number of unpaired electrons in \(\mathrm{Mn}^{4+}(Z=25)\) is (a) Four (b) Two (c) Five (d) Three

In \(\mathrm{XeF}_{2}, \mathrm{XeF}_{4}\) and \(\mathrm{XeF}_{6}\), the number of lone pairs of \(\mathrm{Xe}\) is respectively (a) \(2,3,1\) (b) \(1,2,3\) (c) \(4,1,2\) (d) \(3,2,1\)

The molecular shape of \(\mathrm{SF}_{4}, \mathrm{CF}_{4}\) and \(\mathrm{XeF}_{4}\) are (a) The same with 2,0 and 1 lone pairs of electrons on the central atom respectively (b) The same with 1,1 and 1 lone pair of electrons on the central atom respectively (c) Different with 0,1 and 2 lone pairs of electrons on the central atom respectively (d) Different with 1,0 and 2 lone pairs of electrons on the central atom respectively

KF combines with HF to form \(\mathrm{KHF}_{2}\). The compound contains the species (a) \(\mathrm{K}^{+}, \mathrm{F}^{-}\)and \(\mathrm{H}^{+}\) (b) \(\mathrm{K}^{+}, \mathrm{F}^{-}\)and \(\mathrm{HF}\) (o) \(\mathrm{K}^{+}\)and \(\left[\mathrm{HF}_{2}\right]\) (d) \([\mathrm{KHF}]^{+}\)and \(\mathrm{F}_{2}\)

Planck's constant has the same dimensions as that of (a) Power (b) Work (c) Radiant energy (d) Angular momentum

Which type of bond is not present in \(\mathrm{HNO}_{2}\) molecule? (a) Covalent (b) Co-ordinate (c) Ionic (d) Ionic as well co-ordinate

Rutherford's experiment, which established the nuclear model of the atom, used a beam of (a) \(\beta\)-particles, which impinged on a metal foil and got absorbed (b) \\}rays, which impinged on a metal ejected electrons (c) helium atoms, which impinged on a metal foil and got scattered (d) helium nuclei, which impinged on a metal foil and got scattered

According to Bohr's theory of hydrogen atom, which of the following is quantized for an electron? (a) Angular momentum (b) Angular acceleration (c) Acceleration (d) Velocity

The maximum possible number of hydrogen bonds in which a water molecule can partici- pate is (a) 4 (b) 3 (c) 2 (d) 1

A square planar complex is formed by hybridization of which atomic orbitals? (a) \(\mathrm{s}, \boldsymbol{P}_{\mathrm{N}} \boldsymbol{P}_{\mathrm{y}}, \boldsymbol{P}_{4}\) (b) \(s, p_{x} p_{x} \cdot d_{x^{3}}-y^{2}\) (c) \(\mathrm{s} \mathrm{Px} \mathrm{Py} \mathrm{dz} 2\) (d) \(s p x p z d x y\)

The molecule that is not linear is (a)" \(\mathrm{ICl}_{2}^{+}\) (b) \(\mathrm{XeF}_{2}\) (c) \(\mathrm{I}_{3}^{-}\) (d) \(\mathrm{HgCl}_{2}\)

Which of the following is not linear? (a) \(\mathrm{I}_{3}^{-}\) (b) \(\mathrm{I}_{3}^{+}\) (c) \(\mathrm{CS}_{2}\) (d) \(\mathrm{XeF}_{2}\)

How many \(\mathrm{P}-\mathrm{P}\) bonds are there in \(\mathrm{P}_{4}\) ? (a) 4 (b) 5 (c) 65 (d) 8

Which of the following has the minimum bond order? (a) \(\mathrm{O}_{2}\) (b) \(\mathrm{O}_{2}^{+}\) (c) \(\mathrm{O}_{2}^{-}\) (d) \(\mathrm{O}_{2}^{2}\)