List of top Chemistry Questions on Chemical bonding and molecular structure

Formal charge on sulphur atom in the following three Lewis structures I, II and III respectively is \[ \text{I.}\quad \ddot{S}=C=\ddot{N} \] \[ \text{II.}\quad :S-C\equiv N: \] \[ \text{III.}\quad :S\equiv C-N: \]
Which of the following statements are correct about \(\mathrm{CO_3^{2-}}\) ion?
  1. The hybridisation of the central atom is \(sp^2\).
  2. The average formal charge on each oxygen atom is \(-\frac{2}{3}\).
  3. The resonance hybrid structure does not have one C--O single bond and two C=O double bonds; all C--O bonds are equivalent.
  4. All C--O bond lengths are equal.
In which of the following, the number of valence electrons is maximum?
Match molecules with correct geometries:
BrF$_5$, XeF$_4$, ClF$_3$, SF$_4$
Consider the following \[ \mathrm{HF,\ H_2O,\ BeCl_2,\ CO_2,\ BF_3,\ NF_3,\ CCl_4,\ CHCl_3} \] The number of polar molecules is
Which one of the following molecules has maximum number of lone pairs of electrons?
Consider the following species: \[ Li_2,\; B_2,\; Be_2,\; C_2,\; O_2,\; O_2^{2-},\; F_2 \] The number of species with bond order value 1 is:
Which of the following sets are correctly matched? {|c|c|c|} Set & Molecule & Geometry
I & $\text{BrF}_5$ & Square pyramidal
II & $\text{XeF}_6$ & Distorted octahedral
III & $\text{SF}_4$ & Square planar
IV & $\text{PbCl}_2$ & Linear
Identify correct orders of covalent character:
How many of the following molecules ions are paramagnetic in nature? \[ \mathrm{N_2,\ O_2,\ F_2,\ NO,\ CO,\ O_2^-,\ O_2^{2-},\ N_2^+,\ NO^+,\ NO^-,\ H_2} \]
Identify the correct orders for the given properties. I. C-H<C-O<N-O<C-C (Bond length) {II. } H_2S<O_3<NO_2<CO_2 (Bond angle) {III. } He_2^+<B_2<C_2<N_2 (Bond order)
Identify the reaction in which the hybridization of the underlined atom is changed
Which of the following is favourable condition for the formation of ionic bond ?
Which of the following metal halides have more covalent character?
What is formal charge on sulphur in sulphuric acid molecule?
Which of the following statements regarding Pi \((π)\) bond is NOT true ?
The electronic configurations of elements are as-
\(A = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2\)
\(B = 1s^2 2s^2 2p^6 3s^2 3p^5\)
Which of the following is formula of ionic compound that could be formed between these two elements A and B?
Which statements are NOT TRUE about $XeO_2F_2$?
A. It has a see-saw shape.
B. Xe has 5 electron pairs in its valence shell in $XeO_2F_2$.
C. The O-Xe-O bond angle is close to $180^\circ$.
D. The F-Xe-F bond angle is close to $180^\circ$.
E. Xe has 16 valence electrons in $XeO_2F_2$.
The bond order of $\text{Li}_2$ is _______ and it is _______.
What type of bond is formed by the sharing of electrons between two atoms to achieve a completely filled outermost shell?
Why do ionic compounds have high melting points?
Covalent bonded compounds have low melting and boiling point because of :
The structure of water (\(\text{H}_2\text{O}\)) molecule is resembling with :
C=S & C=Te में परस्पर तथा Cl—Cl & F—F में परस्पर आबंध ऊर्जा का सही क्रम क्या होगा?
निम्नलिखित अणुओं में से कौन से अणु का आबंध कोटि (bond order) इसके उच्चतम अधिग्रहित आण्विक कक्षक (highest occupied molecular orbital) से इलेक्ट्रॉन के निकलने पर बढ़ जायेगा?