There are six groups of p-block elements in the periodic table, ranging from 13 to 18, having the electronic configuration of ns2np1-6. It contains metalloids, non-metals, and all other kinds of elements. The change in their electronic configuration’s inner core significantly impacts their chemical and physical characteristics.
Download Class 11 Chemistry Worksheet on Chapter 11, The p-Block Elements Set 3 PDF.
CBSE Class 11 Chemistry Chapter 11 The p-Block Elements – Set 3
Q-1: Which polymorph of carbon acts as the hardest allotrope?
a) Diamond
b) Graphite
c) Fullerene
d) All of the above
Q-2: SiC is popular with the name
a) Methanide
b) Acetylide
c) Plumbago
d) Carborundum
Q-3: Which one of the following elements forms a double or triple bond involving p𝜋-p𝜋 bonding?
a) Silicon
b) Carbon
c) Tin
d) Germanium
Q-4: Silicones are compounds with
a) Water repelling nature
b) High thermal stability
c) High dielectric strength
d) All of the above
Q-5: On strong heating, boric acid yields
a) B
b) B2H6
c) BO2
d) B2O3
Q-6: i) Why does [SiCl6]– cannot exist?
ii) SiO2 is solid, while CO2 is gas. Why?
Q-7: Burning magnesium continues to burn while burning sulphur gets extinguished when dropped into a jar of nitric oxide. Explain.
Q-8: What is water gas? How is it prepared?
Q-9: a) What do you mean by allotropes?
b) How many allotropes of carbon are there?
c) Write about fullerene in short.
Q-10: Why is graphite preferred over grease as a lubricating agent?
Q-11: What is the percentage of sulphur in ultramarine?
Q-12: Why tetrahalides other than carbon can increase their coordination number?
Q-13:
a) Give any three uses of zeolites.
b) Give one use of dry ice.
Q-14: Which oxide of carbon is an anhydride of carbonic acid?
Q-15: Give chemical reactivity of the carbon family towards the water.
Q-16: Draw a basic structural unit of silicates and name two man-made silicates.
Q-17: a) How does CO2 help maintain blood pH?
b) Give a reason for its use in fire extinguishers.
Q-18: Why do atomic radii of gallium less than aluminium?
Q-19: a) Name an oxide of the boron family which has amphoteric nature.
b) What is the group oxidation state of the boron family?
Q-20: An ionic compound B is created when element A burns in nitrogen. B reacts with water to produce C and D. On bubbling carbon dioxide, a C solution turns milky. Identify A, B, C, and D.
Download the PDF to access answers to the Chemistry Worksheet for Class 11 Chemistry Chapter 11 The p-Block Elements Set – 3.
