The term “p-block elements” refers to substances in which the final electron reaches the p-subshell. There are three p-orbitals in total. With six being the maximum number of electrons that can fit in a set of p-orbitals, the p-block is made up of six groups. These elements’ general electrical configuration is ns2np1-6 (except for He).
Download Class 11 Chemistry Worksheet on Chapter 11, The p-Block Elements Set 2 PDF.
CBSE Class 11 Chemistry Chapter 11 The p-Block Elements– Set 2
Q-1: Which statement is correct for the carbon family?
a) Tin mainly occurs as Cassiterite, SnO2.
b) Silicon is the third most abundant element on the Earth’s crust.
c) Only two isotopes of carbon are present, 12C and 13C.
d) Germanium is more abundant than other members of the carbon family.
Q-2: Which of the following silicates contains discrete tetrahedral units?
a) Sheet silicates
b) Ortho silicates
c) Three-dimensional silicates
d) Pyrosilicates
Q-3: Hydrolysis of dimethyldichlorosilane,(CH3)2SiCl2, followed by condensation polymerisation, yields straight chain polymer of
Q-4: Which of the following statements is wrong?
a) Feldspar are not aluminosilicates.
b) Beryl is an example of cyclic silicate.
c) Mg2SiO4 is an orthosilicate.
d) Basic structural unit in silicates SiO42- is the tetrahedron.
Q-5: Allotropy is due to
a) The differences in the number of atoms in the molecules.
b) Variations in how the atoms are arranged within the crystal molecules.
b) Differing chemical characteristics.
d) All of the above
Q-6:
i) Name a crude form of carbon.
ii) How is it formed?
iii) What are its successive stages of transformation?
iv) Name its superior quality.
Q-7: Why do boron compounds behave as Lewis acids?
Q-8: The ammoniacal cupric chloride solution quickly absorbs carbon monoxide but not carbon dioxide. Explain.
Q-9: Identify the acidic, basic or amphoteric oxide among the following.
B2O3, Al2O3, Ga2O3, In2O3, TlO3
Q-10: What is the reason for the decrease in oxidising power of the carbon family?
Q-11: Why is the boron family considered the most heterogenous family?
Q-12: a) What is glass?
b) Name the compound used as a catalyst in petrochemical industries.
Q-13: Why is there irregularity in metallic character in gallium on moving down the group in the boron family?
Q-14: Give two uses of
a) Boric acid
b) Alums
Q-15: Why do the properties of tin different from germanium despite the same electronegativity?
Q-16: Complete the following reactions.
a) CaCO3(s) + 2HCl (aq) →
b) SiO2 + 2NaOH →
c) 2C + O2 + 4N2 
d) 4BF3 + 3LiAlH4 →
Q-17:
a) Define silicates.
b) What is the hybridisation of Si in SiO42-?
c) Give two examples of orthosilicates.
Q-18: i) Draw the structure of diborane.
ii) a) How many bonds have a bond length of 119 pm?
b) How many bonds have a bond angle of 120o?
c) How many atoms are present in the same plane?
d) How many bridging hydrogens are there in it?
Q-19: Give a reason for the following.
(i) Boron has a high melting point.
(ii) Except for boron, other elements of group 13 show a +1 oxidation state.
Q-20: Give the preparation reaction of silicones and their two uses.
Download the PDF to access answers to the Chemistry Worksheet for Class 11 Chemistry Chapter 11 The p-Block Elements Set – 2.
