P Block Elements MCQs

Elements from groups 13 to 18 of the periodic table are known as p-block elements. In these elements, the last electron occupies one of the three outermost p-orbitals. Except for helium, their valence shell electronic configuration is ns² np(1-6). The presence of d and f electrons in the inner core of the heavier p-block elements causes significant variations in their physical and chemical properties. Only non-metals and metalloids are found in the p-block. The heaviest element in each p-block group is the most metallic.

The nitrogen family, also known as Group 15, includes phosphorus, nitrogen, antimony, arsenic, and bismuth. P-block elements are also referred to as representative elements. The nitrogen family exhibits a wide range of physical states, chemical properties, and appearances.

Graphite has a structural similarity with

(a) B₂H₆
(b) B₄C
(c) B
(d) BN

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]

Find the amphoteric oxide

(a) CaO₂
(b) CO₂
(c) SnO₂
(d) SiO₂

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

P₄O₁₀ has __ bridging O atoms

(a) 4
(b) 5
(c) 6
(d) 2

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

(a) S₂O₇₂^–, S₂O₃₂^–
(b) S₄O₆₂^–, S₂O₇₂^–
(c) S₂O₇₂^–, S₂O₈₂^–
(d) S₄O₆₂^–, S₂O₃₂^–

Which of the species has a permanent dipole moment?

(a) SF₄
(b) SiF₄
(c) BF₃
(d) XeF₄

Oxygen is not released on heating which of the compounds?

(a) (NH₄)₂Cr₂O₇
(b) K₂Cr₂O₇
(c) Zn(ClO₃)₂
(d) KClO₃

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

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