Zeolites — Surface Chemistry Chemistry Question

💡 Solution & Explanation

(A) Zeolites are microporous aluminosilicates. \checkmark (B) General formula: $M_{x/n}[(AlO_2)_x\cdot(SiO_2)_y]\cdot mH_2O$ where cations $M^{n+}$ balance negative framework charge. \checkmark (C) Pore sizes 260–740 pm (molecular dimensions). \checkmark (D) Shape-selective catalysts: only molecules small enough to enter pores react (e.g., ZSM-5). \checkmark All correct: $\boxed{A,B,C,D}$