Which of the following order(s) is / are CORRECT :

Question

TestHub · Accepted Answer

(A) IE₁ increases generally across period, but Be → B is exception (p-subshell effect). So order is incorrect.
beryllium and boron show anomaly.

(B) Bond length increases down group: HF < HCl < HBr < HI correct.
hydrogen halides

(C) Acidic nature of oxides increases across period: Na₂O < MgO < Al₂O₃ < SiO₂ < P₂O₅ correct.

(D) Ionic radius increases down group: Li⁺ < Na⁺ < K⁺ < Cs⁺ correct.

Correct options: (B), (C), (D)

Chemistry - PERIODIC TABLE Question with Solution | TestHub