Question Bank Directory

The most preferred structure among the following with the lowest energy for $SO_{3}$ is:

The correct order of C-O bond length among CO, $CO_3^{2-}$, and $CO_2$ is:

Which of the following is incorrect statement?

The correct order of increasing bond order among the given is:

Which of the following is the most basic oxide?

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

The compound that forms a linear polymer due to hydrogen bonding is:

Among the following, the pair in which the two species are not isostructural is:

A species that does not exhibit paramagnetism is:

Increasing order of bond length is:

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

The number of hydrogen bonded water molecules(s) associated with CuSO₄·5H₂O is:

The incorrect statement among the following for sigma- ($\sigma$) and pi- ($\pi$) bonds formed between two carbon atoms is:

Match the compounds given in Column I with the hybridization and shape given in Column II and mark the correct option. **Column I** (A) XeF₆ (B) XeO₃ (C) XeOF₄ (D) XeF₄ **Column II** (1) Distorted octahedral (2) Square planar (3) Pyramidal (4) Square pyramidal

The correct shape and hybridisation for $\text{XeF}_4$ are:

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 of the following set of molecules will have zero dipole moment?

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

Which one of the following is the correct order of decreasing bond enthalpies for the given species?

For a sample of perfect gas when its pressure is changed isothermally from $p_i$ to $p_f$, the entropy change is given by: