NO=7e−Incomplete octet with NO2=7e−∫ odd electron BCl3=6e−AlCl3=6e−}Incomplete octet H2SO4=12e−,PCl5=10e−⇒ molecules with expanded octet CCl4=8e−,CO2=8e−⇒ molecules obeying octet rule
JEE Main 2025 — Chemistry Inorganic Chemistry
Match the LIST-I with LIST-II 
Choose the correct answer from the options given below:
Held on 23 Jan 2025 · Verified 6 Jul 2026.
A-IV, B-I, C-III, D-II
A-IV, B-II, C-I, D-III
A-II, B-IV, C-III, D-I
A-III, B-II, C-I, D-IV
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It is noticed that $\mathrm{Pb}^{2+}$ is more stable than $\mathrm{Pb}^{4+}$ but $\mathrm{Sn}^{2+}$ is less stable than $\mathrm{Sn}^{4+}$. Observe the following reactions. $\mathrm{PbO}_{2}+\mathrm{Pb} \rightarrow 2 \mathrm{PbO} ; \Delta_{\mathrm{r}} \mathrm{G}^{\circ}(1)$ $\mathrm{SnO}_{2}+\mathrm{Sn} \rightarrow 2 \mathrm{SnO} ; \Delta_{\mathrm{r}} \mathrm{G}^{\circ}(2)$ Identify the correct set from the following
In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right element, except noble gases, are respectively.
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Which of the following elements has the highest electronegativity?
On heating a mixture of common salt and $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ in equal amount along with concentrated $\mathrm{H}_{2} \mathrm{SO}_{4}$ in a test tube, a gas is evolved. Formula of the gas evolved and oxidation state of the central metal atom in the gas respectively are:
Work through every JEE Main Inorganic Chemistry PYQ, year by year.