List of top Chemistry Questions on Chemical bonding and molecular structure asked in IISER

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?

What is the time period of revolution of an electron in the fourth Bohr orbit of $\text{He}^+$?
(Bohr radius = 52.9 picometers, mass of an electron = $9.11 \times 10^{-31}\text{ kg}$, Planck’s constant = $6.626 \times 10^{-34}\text{ Js}$)}

Which among the following processes is/are associated with increasing bond order but no change in diamagnetic/paramagnetic behaviour?
(i) $\text{N}_2 \rightarrow \text{N}_2^+ + \text{e}^-$
(ii) $\text{O}_2 \rightarrow \text{O}_2^+ + \text{e}^-$
(iii) $\text{O}_2 + \text{e}^- \rightarrow \text{O}_2^-$

Which one of the following statements best describes the acidic/basic/amphoteric nature of ZnO and CaO?

According to the VSEPR theory, what are the most stable shapes of \(\text{XeF}_4\) and \(\text{SF}_4\), respectively?

Which one of the following statements is correct about \(\text{N}_2\), \(\text{CO}\), and \(\text{NO}^+\)?

If an element with Z = 120 is discovered, then which group of elements will it belong to?