Question Bank Directory

The hybridisation of Ni in the complex $[Ni(CN)_4]^{2-}$ is: (Atomic number of Ni = 28)

Which of the following molecule does not possess a $\pi$ bond?

Identify the correct statement for the change of Gibbs energy for a system ($\Delta G_{\text{system}}$) at constant temperature and pressure:

Which of the compounds given below will exhibit a linear structure?

A molecule among the following that has the maximum dipole moment is:

$H_{2}O$ is dipolar, whereas $BeF_{2}$ is not. It is because:

Which of the two species, $NO_{3}^{-}$ or $H_{3}O^{+}$, has the correctly described properties listed below?

Match the following oxides with their nature: **Column I** (a) CO (b) BaO (c) Al₂O₃ (d) Cl₂O₇ **Column II** (i) Basic (ii) Neutral (iii) Acidic (iv) Amphoteric

The tendency of $\text{BF}_3$, $\text{BCl}_3$, and $\text{BBr}_3$ to behave as Lewis acid decreases in the sequence:

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has a high melting point?

$\Delta E^{\circ}$ of combustion of isobutylene is $-X \text{ kJ mol}^{-1}$. The value of $\Delta H^{\circ}$ is [DCE 2004]:

The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm⁻³, respectively. If the standard free energy difference (∆Gº) is equal to 1895 J mol⁻¹, the pressure at which graphite will be transformed into diamond at 298 K is:

If the main axis of a diatomic molecule is z, then the molecular orbital $p_x$ and $p_y$ overlap to form which of the following orbital:

Which statement about peptide bonds is NOT true?

$\text{XeF}_2$ is isostructural with:

Dipole-induced dipole interactions are present in which of the following pairs?

Which of the following species contains equal number of $\sigma$ and $\pi$ bonds?

The pair of electrons in the given carbanion, $\text{CH}_3\text{C}\equiv\text{C}^-$, is present in which of the following orbitals?

$BF_3$ is a planar and an electron-deficient compound. Hybridisation and the number of electrons around the central atom, respectively, are:

Which pair of the following compounds has one lone pair of electrons on the central atom?