Problem 169
The number of \(\sigma\) bonds in 1 -buten-3-yne is
Problem 170
Of the following, the number of species having two and more than two electrons in the antibonding molecular orbital is__ \(\mathrm{He}_{2}, \mathrm{He}_{2}^{+}, \mathrm{B}_{2}, \mathrm{O}_{2}^{-}, \mathrm{N}_{2}^{-}\)
Problem 172
Among \(\mathrm{BF}_{3}, \mathrm{NF}_{3}, \mathrm{PH}_{3}, \mathrm{IF}_{3}, \mathrm{IF}_{5}\) and \(\mathrm{SF}_{4}\), the number of species having the same number of lone pair of electrons on the central atom is
Problem 175
Of the following the number of species having unpaired electron are \(\mathrm{B}_{2}, \mathrm{KO}_{2}, \mathrm{BaO}_{2}, \mathrm{NO}_{2}, \mathrm{O}_{2}, \mathrm{ClO}_{2}, \mathrm{O}_{2}\left[\mathrm{AsF}_{6}\right]\)
Problem 176
Find the total number of pr-d \(\pi\) bonds present in \(\mathrm{XeO}_{4}\).
Problem 179
In trimer form of sulphur trioxide, each sulphur atom is bonded to \(\quad \mathrm{O}\) atoms.
Problem 180
Of the following, the number of species having unpaired electron are \(\mathrm{B}_{2}, \mathrm{KO}_{2}, \mathrm{BaO}_{2}, \mathrm{NO}_{2}, \overline{\mathrm{O}_{2}, \mathrm{NO}}, \mathrm{ClO}_{2}, \mathrm{O}_{2}\left[\mathrm{AsF}_{6}\right]\)
Problem 181
Number of \(\mathrm{P}-\mathrm{O}\) bonds in \(\mathrm{P}_{4} \mathrm{O}_{10}\) is (a) 17 (b) 16 (c) 15 (d) 6
Problem 182
Bond angle of \(109^{\circ} 28\) ' is found in (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{CH}_{3}\) (d) \(\mathrm{NH}_{4}^{+}\)
Problem 183
Hybridization of the underlined atom changes in which of the following transitions? (a) \(\mathrm{AIH}_{3}\) changes to \(\mathrm{AlH}_{4}^{-}\) (b) \(\mathrm{H}_{2} \underline{\mathrm{O}}\) changes to \(\mathrm{H}_{3} \mathrm{O}^{+}\) (c) \(\mathrm{NH}_{3}\) changes to \(\mathrm{NH}_{4}^{+}\) (d) in all cases
