List of top Chemistry Questions on Chemical bonding and molecular structure

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 _______.
Formal charge on sulphur atom in the following three Lewis structures I, II and III respectively is \[ \text{I.}\quad \ddot{S}=C=\ddot{N} \] \[ \text{II.}\quad :S-C\equiv N: \] \[ \text{III.}\quad :S\equiv C-N: \]
How many of the following molecules ions are paramagnetic in nature? \[ \mathrm{N_2,\ O_2,\ F_2,\ NO,\ CO,\ O_2^-,\ O_2^{2-},\ N_2^+,\ NO^+,\ NO^-,\ H_2} \]
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
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 :
In which of the following, the number of valence electrons is maximum?
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.
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:
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 correct orders of covalent character:
Match molecules with correct geometries:
BrF$_5$, XeF$_4$, ClF$_3$, SF$_4$
Which one of the following molecules has maximum number of lone pairs of electrons?
Identify the reaction in which the hybridization of the underlined atom is changed
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?
An ideal gas goes through a reversible isothermal expansion (solid line) followed by a reversible adiabatic expansion (dashed line). Which of the following diagram(s) closely depict(s) the entire process?
Metal-ligand $\pi$-bond formation in Mn$_2$(CO)$_{10}$ and [MnO$_4$]$^-$ requires electron-pair donation between metal and ligand orbitals. Which one of the following represents the direction of electron-pair donation?
What are the numbers of protons (H$^+$) and electrons (e$^-$), respectively, required for the reduction of [Cr$_2$O$_7$]$^{2-}$ to Cr$^{3+}$ under an aqueous acidic condition?
The wave numbers of three spectral lines of hydrogen atom are considered. Identify the set of spectral lines belonging to the {Balmer series. (\(R\) = Rydberg constant)}
Consider the reaction: \[ \text{Ph–CH=CH}_2 \xrightarrow[\text{peroxide}]{\text{HBr}} \text{Product} \] Which of the following statements are correct?
[A.] The reaction proceeds through a more stable radical intermediate.
[B.] The role of peroxide is to generate \(\mathrm{H^\bullet}\) radical.
[C.] During this reaction, benzene is formed as a byproduct.
[D.] \(1\)-Bromo-\(2\)-phenylethane is formed as a minor product.
[E.] The same reaction in absence of peroxide proceeds via a carbocation intermediate. Choose the correct answer.
Identify the correct set of molecules with zero dipole moment: