91Ó°ÊÓ

Bond angle of \(109^{\circ} 28\) ' is found in: (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\stackrel{+}{\mathrm{CH}}_{3}\) (d) \({ }^{+} \mathrm{NH}_{4}\)

Which of the following is an electron deficient molecule? (a) \(\mathrm{C}_{2} \mathrm{H}_{6}\) (b) \(\mathrm{PH}_{3}\) (c) \(\mathrm{B}_{2} \mathrm{H}_{6}\) (d) \(\mathrm{SiH}_{4}\)

Which of the following molecules/ions does not contain unpaired electrons? (a) \(\mathrm{O}_{2}^{2-}\) (b) \(\mathrm{B}_{2}\) (c) \(\mathrm{N}_{2}^{+}\) (d) \(\mathrm{O}_{2}\)

In 1,3 -butadiene, the carbon is hybridized as: (a) sp (b) sp \(^{2}\) (c) \(\mathrm{sp}^{3}\) (d) \(\mathrm{sp}^{2}\) and \(\mathrm{sp}^{3}\)

Born-Haber cycle is used to determine: (a) Electron affinity (b) Lattice energy (c) Crystal energy (d) All the above

\(\mathrm{BaSO}_{4}\) is insoluble in water because of: (a) Low hydration energy (b) Low lattice energy (c) High lattice energy (d) Both (a) and (c)

The boiling point of alcohol is high due to: (a) Hydrogen bonding (b) Large size of alcohol (c) Presence of \(-\mathrm{OH}\) group (d) High molecular weight

How many sigma and pi bonds are present in toluene? (a) \(3 \pi+15 \sigma\) (b) \(6 \pi+6 \sigma\) (c) \(3 \pi+6 \sigma\) (d) \(3 \pi+8 \sigma\)

The hybridization of atomic orbitals of nitrogen \(\mathrm{inNO}_{2}^{+}, \mathrm{NO}_{3}^{-}\) and \(\mathrm{NH}_{4}^{+}\) are: (a) \(\mathrm{sp}^{2}, \mathrm{sp}^{3}\) and \(\mathrm{sp}^{2}\) respectively (b) sp, sp and sp respectively (c) \(\mathrm{sp}^{2}\), sp and sp \(^{3}\) respectively (d) \(\mathrm{sp}^{2}, \mathrm{sp}^{3}\) and sp respectively

Which of the following types of bonds are present in \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O} ?\) (1) electrovalent (2) covalent (3) coordinate Select the correct answer using the code given below. (a) 1 and 2 only (b) 1 and 3 only (c) 1,2 and 3 (d) 2 and 3 only