The elements belonging to groups 13-18 are called the p-block elements. The general electronic configuration for all these elements is ns2 np1-6; the value of n lies anywhere from 2 to 6. The elements of p-block include all- metals, metalloids and nonmetals.
Download Class 12 Chemistry Worksheet on Chapter 7 The P-Block Elements Set 1 PDF
CBSE Class 12 Chemistry Chapter 7 The P-Block Elements Worksheet – Set 1
Q-1: The inability of Nitrogen to form a pentahalide is due to:
a.) the small size of Nitrogen
b.) the absence of d-orbitals
c.) the high ionisation energy
d.) the high electronegativity of Nitrogen
Q-2: What is the maximum covalency of sulphur?
a.) 2
b.) 4
c.) 6
d.) 8
Q-3: Given that both- NO and ClO2 are odd electrons species, why does ClO2 show dimerisation whereas NO does not?
Q-4: The absence of S-S bond is in:
a.) S2O42-
b.) S2O72-
c.) S2O52-
d.) S2O32-
Q-5: Why does N2 show less reactivity at room temperature?
Q-6: What is the shape of ClO3–?
a.) Triangular pyramidal
b.) Triangular bipyramidal
c.) Triangular planar
d.) Tetrahedral
Q-7: Why does the bleaching of flowers by sulphur dioxide (SO2) leave a temporary effect and that with chlorine shows a permanent effect?
Q-8: Why does FCl3 not exist whereas ClF3 exists?
Q-9: Choose the correct statement for xenon fluorides.
a.) XeF6 acts as a Lewis acid with RbF
b.) XeF2 acts as a Lewis base with SbF5
c.) The first isolated noble gas compound was XePtF6
d.) All of the above
Q-10: Why does the KCl crystal sometimes appear violet in colour?
Q-11: Why is H2Te more acidic than H2S?
Q-12: Write a balanced chemical equation for the reaction between Bi2O3 and HNO3.
Q-13: Why does nitric oxide turn brown when it is released in air?
Q-14: Why is H3PO3 diprotic in nature?
Q-15: Select the most acidic halide.
a.) PCl3
b.) SbCl3
c.) CCl4
d.) BiCl3
Q-16: The five bonds in phosphorus pentachloride are not equivalent. Explain.
Q-17: What level of fluoride is toxic to bones and teeth?
a.) 1 ppm
b.) 3 ppm
c.) 5 ppm
d.) 7 ppm
Q-18: Write the balanced chemical equation for the thermal decomposition of sodium azide.
Q-19: Why cannot carbon be used to reduce aluminium?
Q-20: Why is the bond energy of F2 lesser than that of Cl2?
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