Question

21. Which of these oxides will produce a basic solution when dissolved in water? A) CO2 B) SO C) P205 D) Rb20 Ks = 2.0 x 10-5 22. Calculate the pH of a 0.021 M NaCN solution. [K, = 4.9 x 10-10 A) 1.68 B) 3.18 C) 5.49 D) 7.00 E) 10.82 23. Which response gives the products of hydrolysis of KF? A) KOH + HF B) OH + HF C) KOH + H+F D) KH+ + OH E) No hydrolysis occurs. 24. Which one of these salts will form a basic solution upon dissolving in water? A) LiBr B) NaF C) NH.NO D) Cr(NO3) E)

Answer 1

solution :- 2) since all non-metallic oxides are acidic in nature and on dissolving in water they will produce acidic solution . But metallic oxides are basic in nature and gives baseć solectic - from the given option CO2, SO2 and P2O5 all are acidic non metallic oxides But Rb₂o es alkaline metallic oxides hence it will produce basic solution → answer is (DJ RDD