The P-Block elements are diverse in case of properties, bonding and structures. The elements of P-block include the nitrogen family elements also known as the pnicogens, oxygen family elements also known as the chalcogens (the elements which form ores), the halogen family; the sea salt forming elements and the noble gases also known as the aerogens ( found in air). The elements of p-block include metals, metalloids and nonmetals.
Download Class 12 Chemistry Worksheet on Chapter 7 The P-Block Elements Set 3 PDF
CBSE Class 12 Chemistry Chapter 7 The P-Block Elements Worksheet – Set 3
Q-1: The shapes of SF4, CF4 and XeF4 are:
a.) different with 1, 0, and 2 lone pairs of electrons respectively
b.) different with 0, 1, and 2 lone pairs of electrons respectively
c.) the same with 2, 0, and 1 lone pairs of electrons respectively
d.) the same with 1, 1, and 1 lone pairs of electrons respectively
Q-2: Identify which of the following indicated properties is represented incorrectly.
a.) Br2 < Cl2 < F2: Electronegativity
b.) Br2 < F2 < Cl2: Electron Affinity
c.) Br2 < Cl2 < F2: Oxidising power
d.) Br2 < Cl2 < F2: Bond Energy
Q-3: Why does PH3 have a lower boiling point than NH3?
Q-4: Which among the following compounds forms a linear polymeric structure due to the intermolecular hydrogen bonding?
a.) H2O
b.) HCl
c.) HF
d.) NH3
Q-5: How can the basic nature of PH3 be proved?
Q-6: The number of S-S bonds present in the trimer of sulphur trioxide (SO3)3 is:
a.) 0
b.) 1
c.) 2
d.) 3
Q-7: Why HI cannot be prepared by heating sodium iodide (NaI) with concentrated sulphuric acid (H2SO4)?
Q-8: Draw the structures of XeF2 and XeF4 along with the representation of lone pairs of electrons.
Q-9: The 𝞼 bonds present in P4O10 are___.
a.) 6
b.) 7
c.) 16
d.) 20
Q-10: Why is the +5 oxidation state of Bismuth less stable than the +3 oxidation state? Give a chemical reaction for the same.
Q-11: Why only water among the hydrides of group 16 elements shows unusual properties?
Q-12: SF6 forms but SCl6 does not. Why?
Q-13: Why do halogens have the maximum value of negative electron gain enthalpy?
Q-14: Why is iodine more soluble in potassium iodide than in water?
Q-15: The number of lone pair and bond pair of electrons on nitrogen in NO3– are:
a.) 2, 2
b.) 3, 1
c.) 1, 3
d.) 0, 4
Q-16: Which of the following ionic species is basic and reducing in nature?
Q-17: Which of the following ionic species is basic and reducing in nature?
a.) SO32-
b.) S2O42-
c.) SO42-
d.) HSO4–
Q-18: Why are the interhalogen compounds more reactive than halogens?
Q-19: Why is perchloric acid stronger than sulphuric acid?
Q-20: Complete the following reaction equation:
Ca(OCl)2 + HCl →
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