JEE Main 2026 — Chemistry Inorganic Chemistry

Statement A: Vanadium pentoxide ($\text{V}_2\text{O}_5$V2​O5​) is used as a catalyst in the manufacture of $\text{H}_2\text{SO}_4$H2​SO4​ by the Contact process. $\text{V}_2\text{O}_5$V2​O5​ is an amphoteric oxide, not a basic oxide. Thus, statement A is incorrect.

Statement B: The transition metal halide used in Ziegler-Natta polymerization is $\text{TiCl}_4$TiCl4​. In $\text{TiCl}_4$TiCl4​, titanium is in the $+4$+4 oxidation state with a $3\text{d}^0$3d0 electronic configuration. The number of unpaired electrons is zero, so its spin-only magnetic moment is $0$0 BM. Thus, statement B is incorrect.

Statement C: The p-block metal compound used in Ziegler-Natta polymerization is triethylaluminium, $\text{Al}(\text{C}_2\text{H}_5)_3$Al(C2​H5​)3​. Aluminium is a p-block element and is in the $+3$+3 oxidation state. Thus, statement C is correct.

Statement D: The metal halide employed in the Wacker process is $\text{PdCl}_2$PdCl2​. Palladium (Pd) has the electronic configuration $[\text{Kr}] 4\text{d}^{10}$[Kr]4d10. In $\text{PdCl}_2$PdCl2​, Pd is in the $+2$+2 oxidation state, giving it a $4\text{d}^8$4d8 configuration. The number of electrons in the outermost d-orbital is $8$8. Thus, statement D is correct.

Therefore, only statements C and D are correct.