List of top Chemistry Questions on Chemical bonding and molecular structure

Resonance in X$_2$Y can be represented as

The enthalpy of formation of X$_2$Y is 80 kJ mol$^{-1}$, and the magnitude of resonance energy of X$_2$Y is:

In $ SO_2 $, $ NO_2^- $ and $ N_3^- $ the hybridizations at the central atom are respectively :

Match the LIST-I with LIST-II.

Choose the correct answer from the options given below :

Given below are two statements :
Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes.
Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes.
In the light of the above statements, choose the Correct answer from the options given below

Given below are two statements:
Statement I : The N-N single bond is weaker and longer than that of P-P single bond
Statement II : Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions.
In the light of above statements, choose the correct answer from the options given below

Match the LIST-I with LIST-II

LIST-I	LIST-II
A. PF₅	I. dsp²
B. SF₆	II. sp³d
C. Ni(CO)₄	III. sp³d²
D. [PtCl₄]^2-	IV. sp³

Choose the correct answer from the options given below:

Which of the following is chloral?

The number of unpaired electrons in one molecule of liquid oxygen is

Which of the following molecules has the highest bond angle?

Polar molecule among the following is:

Minimum bond length is of:

The number of molecules having lone pair of electrons on central atom in the following is: BF$_3$, SF$_4$, SiCl$_4$, XeF$_4$, NCl$_3$, XeF$_6$, PCl$_5$, HgCl$_2$, SnCl$_2$

Identify the pair of molecules which have the same hybridisation as the hybridisation in Xenon (II) fluoride.

The correct order of increasing bond lengths of C--H, O--H, C--C, and H--H is

How many of the following molecules / ions have a trigonal planar structure?
$ \text{BO}_3^{3-}, \, \text{NH}_3, \, \text{PCl}_3, \, \text{BCl}_3, \, \text{ClF}_3, \, \text{XeO}_3 $

Consider the following
Assertion (A): Dipole moment of NF$_3$ is lesser than NH$_3$
Reason (R): In NF$_3$, the orbital dipole due to lone pair of electrons is in the opposite direction to the resultant dipole moment of the three N-F bonds.
The correct answer is:

The pairs of compounds which have the same molecular geometry are
I) BF\textsubscript{3}, BrF\textsubscript{3}
II) XeF\textsubscript{2}, BeCl\textsubscript{2}
III) BCl\textsubscript{3}, PCl\textsubscript{3}
IV) PCl\textsubscript{3}, NCl\textsubscript{3}

Which of the following sets are not correctly matched?
I) O\textsubscript{2}\textsuperscript{+}, O\textsubscript{2}\textsuperscript{–} \hspace{1em} – diamagnetic
II) O\textsubscript{2}\textsuperscript{–}, O\textsubscript{2} \hspace{3.8em} – paramagnetic
III) O\textsubscript{2}\textsuperscript{–}, O\textsubscript{2}\textsuperscript{2–} \hspace{1em} – diamagnetic
IV) O\textsubscript{2}\textsuperscript{+}, O\textsubscript{2}\textsuperscript{2–} \hspace{1em} – paramagnetic

A diatomic molecule has a dipole moment of $ 4 \times 10^{-30} \, \text{Cm} $. If the bond distance is $ 1.0 \, \text{\AA} $, what fraction of an electronic charge exists on each atom? (Actual value of electronic charge = $ 1.6 \times 10^{-19} \, \text{C} $)

A molecule ‘X’ has square pyramidal geometry, as per VSEPR theory. The number of bond pairs and lone pairs of electrons present in the valence shell of central atom of X, respectively, are

The increasing order of covalent character of $\mathrm{NaCl}$ (I), $\mathrm{RbCl}$ (II), $\mathrm{MgCl}_2$ (III), $\mathrm{AlCl}_3$ (IV) is: