MCQs on p-Block Elements for NEET

Elements of the group 13 to 18 in the periodic table are known as p-Block elements. In these elements, the last electron goes to one of the outermost three p-orbital. Except for He, their valance shell electronic configuration is ns², np^(1-6). Due to the presence of d and f electron in the inner core of heavier p-block elements, there exists a large variation in their physical and chemical properties. Non-metals and metalloids only exist in the p-block. The heaviest element of each group of p-block is the most metallic in nature.

Phosphorous, Nitrogen, Antimony, Arsenic and Bismuth are included in the Nitrogen family and are the Group 15 elements. The p-block elements are referred to as the Representative elements. These nitrogen elements are said to possess a wide range in terms of their physical state in the periodic table. The diversity is wide even on chemical aspects. Likewise, the variety is diverse when it comes to the appearance of these 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 p𝜋-d𝜋 bonds are present

(b) four sp³ – p 𝜎 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)

Also see:

• Why Is Group 15 Called Pnictogens?
• Electronic Configuration – Group 15 Elements

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P-Block Elements Group 13 and 14 Class 11 Chemistry One Shot | NEET 2023 Chemistry Exam Preparation