NCERT MCQ CLASS-12 CHAPTER-7 | CHEMISTRY NCERT MCQ | THE p-BLOCK ELEMENTS | EDUGROWN

In This Post we are  providing Chapter-7 The p-Block Elements NCERT MCQ for Class 12 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON THE p-BLOCK ELEMENTS

1. Among the following, which one is a wrong statement.
(a) PH₅ and BiCl₅ do not exist.
(b) pπ-dπ bonds are present in SO₂
(c) SeF₄ and CH₄ have same shape.
(d) I₃ has bent geometry.

Answer: c

2. In which of the pair of ions, both species contain S—S bond?

Answer: a

3. Which one of the following order is correct for the bond dissociation enthalpy of halogen molecule?
(a) Br₂ > I₂ > F₂ > Cl₂
(b) F₂ > Cl₂ > Br₂ > I₂
(c) I₂ > Br₂ > Cl₂ > F₂
(d) Cl₂ > Br₂ > F₂ > I₂

Answer: d

4. Which is strongest acid in the following:
(a) HClO₄
(b) H₂SO₃
(c) H₂SO₄
(d) HClO₃

Answer: a

5. In which of the following pairs, the two species are isostructural

Answer: c

6. The correct order of oxidizing power is
(a) HClO₄ > HClO₃ > HClO₂ > HCIO
(b) HOCl > HClO₂ > HClO₃ > HClO₄
(c) HClO₃ > HClO₄ > HClO₂ > HClO
(d) HCIO₂ > HOCl > HClO₃ > HClO₄

Answer: b

7. The correct order of acid strength is
(a) HClO₄ < HClO₃ < HClO₂ < HClO
(b) HCIO < HClO₂ < HClO₃ < HClO₄
(c) HClO₄ < HClO < HClO₂ < HClO₃
(d) HClO₂ < HClO₃ < HClO₄ < HClO

Answer: b

8. Among the following which is strongest oxidizing agent.
(a) Br₂
(b) I₂
(c) Cl₂
(d) F₂

Answer: d

9. The correct order of bond angles in the following species is

Answer: b

10. Sulphur trioxide can be obtained by which of the following:

Answer: (b)

11. When Cl₂ reacts with hot and cone. NaOH, the oxidation number of chlorine changes from
(a) zero to +1 and zero to +5
(b) 0 to -1 and 0 to +5
(c) zero to -1 and zero to +3
(d) 0 to +1 and 0 to -3

Answer: b

12. Acidity of diprotic acid in aqueous solution increases in the order.
(a) H₂S < H₂Se < H₂Te
(b) H₂Se < H₂S < H₂Te
(c) H₂Te < H₂S < H₂Se
(d) H₂Se < H₂Te < H₂S

Answer: a

13. Which of the following statement is incorrect?
(a) ONF is isoelectronic with NO^–₂
(h) OF₂ is an oxide of fluoride
(c) Cl₂O₇ is an anhydride of perchloric acid
(d) O₃ molecule is bent

Answer: b

14. Chlorine reacts with excess of NH₃ to form
(a) NH₄Cl
(b) N₂ + HCl
(c) N₂ + NH₄Cl
(d) NCl₃ + HCl

Answer: c

15. Which of the following reactions is an example of redox reaction?
(a) XeF₄ + O₂F₂ → XeF₆ + O₂
(b) XeF₂ + PF₅ → [XeF]⁺ [PF₆]^–
(c) XeF₆ + H₂O → XeOF₄ + 2HF

Answer: a

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