MCQs on p-Block Elements

MCQs on p-Block Elements

1. Find the amphoteric oxide

(a) CaO₂

(b) CO₂

(c) SnO₂

(d) SiO₂

Answer: (c)

2. Graphite has a structural similarity with

(a) B₂H₆

(b) B₄C

(c) B

(d) BN

Answer: (d)

3. Which is the correct order of decreasing acidity of lewis acids?

(a) BBr₃ > BCl₃ > BF₃

(b) BF₃ > BCl₃ > BBr₃

(c) BCl₃ > BF₃ > BBr₃

(d) BBr₃ > BF₃ > BCl₃

Answer: (a)

4. In the presence of KF, AlF₃ is soluble in HF. Find the complex formed

(a) K₃[AlF₆]

(b) AlH₃

(c) K[AlF₃H]

(d) K₃[AlF₃H₃]

Answer: (a)

5. S-S bond is present in which of the ion pairs

(a) S₂O₇^2-, S₂O₃^2-

(b) S₄O₆^2-, S₂O₇^2-

(c) S₂O₇^2-, S₂O₈^2-

(d) S₄O₆^2-, S₂O₃^2-

Answer: (d)

6. Which is the correct order of decreasing bond dissociation enthalpy?

(a) F₂ > Cl₂ > Br₂ > I₂

(b) I₂ > Br₂ > Cl₂ > F₂

(c) Cl₂ > Br₂ > F₂ > I₂

(d) Br₂ > I₂ > F₂ > Cl₂

Answer: (c)

7. Oxygen is not released on heating which of the compounds?

(a) (NH₄)₂Cr₂O₇

(b) K₂Cr₂O₇

(c) Zn(ClO₃)₂

(d) KClO₃

Answer: (a)

8. Which of the species has a permanent dipole moment?

(a) SF₄

(b) SiF₄

(c) BF₃

(d) XeF₄

Answer: (a)

9. Which of the statement is incorrect for XeO₄ ?

(a) four p????-d???? bonds are present

(b) four sp³ – p ???? bonds are present

(c) It has a tetrahedral shape

(d) It has a square planar shape

Answer: (d)

10. P₄O₁₀ has ______ bridging O atoms

(a) 4

(b) 5

(c) 6

(d) 2

Answer: (c)