91Ó°ÊÓ

Which of the following oxoacids of sulphur contains \(S=S\) bond? (a) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{6}\) (b) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}\) (c) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{8}\) (d) \(\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{4}\)

Any p-orbital can accommodate up to: (a) 4 electrons (b) 2 electrons with parallel spins (c) 6 electrons (d) 2 electrons with opposite spins

The shape of \(\mathrm{XeF}_{4}\) is (a) Tetrahedral (b) Square planar (c) Pyramidal (d) Nearly linear

In an atom two electrons are moving in orbits of radii \(r\) and \(9 r\). The ratio of time taken by them to complete one revolution is (a) \(1: 9\) (b) \(1: 3\) (c) \(1: 27\) (d) \(1: 6\)

The structure of \(\mathrm{XeO}_{2} \mathrm{~F}_{2}\) is (a) Plane triangular (b) Trigonal bipyramidal (c) Square planar (d) Tetrahedral

The number of electrons in the 3 d shell of the element with atomic number 26 is (a) 4 (b) 6 (c) 8 (d) 10

Principal, arimuthal and magnetic quantum numbers are respectively related to: (a) size, shape and orientation (b) shape, size and orientation (d) none of the above (c) sire, orientation and shape (d) none of the above

The bonding of \(\mathrm{S}\) in \(\mathrm{SCl}_{4}\) molecule involves (a) sp orbitals (b) \(\mathrm{sp}^{2}\) orbitals (c) \(sp^{3}\) orbitals (d) \(\mathrm{dsp}^{2}\) orbitals

The correct order of decreasing polarisable ions is (a) \(\mathrm{Cl}^{-}, \mathrm{Br}^{-}, \mathrm{F}, \mathrm{F}^{-}\) (b) \(\mathrm{F}^{-}, \mathrm{I}, \mathrm{Br}^{-}, \mathrm{Cl}^{-}\) (c) \(\mathrm{F}, \mathrm{Cl}^{-}, \mathrm{Br}^{-}, \mathrm{I}^{-}\) (d) \(\mathrm{I}^{-}, \mathrm{Br}^{-}, \mathrm{Cl}^{-}, \mathrm{F}^{-}\)

Among the following, the pair in which the two species are not isostructural is (a) \(\mathrm{IO}_{3}^{-}\)and \(\mathrm{XeO}_{3}\) (b) \(\mathrm{BH}_{4}^{-}\)and \(\mathrm{NH}_{4}^{+}\) (c) \(\mathrm{PF}_{6}^{-}\)and \(\mathrm{SF}_{6}\) (d) \(\mathrm{SiF}_{4}\) and \(\mathrm{SF}_{4}\)