Class 11 Chemistry MCQ Chapter 11 The p-Block Elements
Are you searching for Class 11 Chemistry MCQ Chapter 11 The p-Block Elements English Medium? If yes, then this article is a valuable study resource for AHSEC Higher Secondary First Year students. Here, you will find important multiple-choice questions (MCQs) with answers to help you prepare effectively for examinations.
The chapter The p-Block Elements introduces students to the elements of Groups 13 to 18 of the periodic table. It covers important topics such as electronic configuration, physical and chemical properties, trends in the periodic table, and the compounds formed by p-block elements. Students will also learn about the unique characteristics of elements like boron, carbon, nitrogen, oxygen, and their important compounds.
These MCQ questions are based on the latest AHSEC syllabus and examination pattern. They are designed to help students revise important concepts, improve subject knowledge, and gain confidence in answering objective questions during examinations.
Whether you are preparing for class tests, annual exams, or the AHSEC HS First Year Final Examination, these MCQ solutions will help you strengthen your Chemistry concepts and achieve better results.
Part II
Class 11 Chemistry MCQ Chapter 11 The p-Block Elements
Selected VSA & MCQ
I. Very Short Answer Questions (VSA)
Q: Which groups of the periodic table constitute the p-block elements?
Ans: Groups 13 to 18 constitute the p-block elements.
Q: Why are p-block elements so called?
Ans: p-block elements are so called because their valence electrons enter the p-orbital.
Q: Which group of the p-block is known as the boron family?
Ans: Group 13 is known as the boron family.
Q: Name the elements of Group 13.
Ans: Boron, aluminium, gallium, indium and thallium are the elements of Group 13.
Q: Which element of Group 13 is a metalloid?
Ans: Boron is a metalloid.
Q: Which metal is most abundant in the earth’s crust?
Ans: Aluminium is the most abundant metal in the earth’s crust.
Q: What is the oxidation state commonly shown by Group 13 elements?
Ans: Group 13 elements commonly show +3 oxidation state.
Q: Why does boron differ from other Group 13 elements?
Ans: Boron differs due to its small size, high ionisation enthalpy and absence of dorbitals.
Q: Name one important ore of aluminium.
Ans: Bauxite is an important ore of aluminium.
Q: What is alum?
Ans: Alum is a double sulphate of potassium and aluminium.
Q: Which group is known as the carbon family?
Ans: Group 14 is known as the carbon family.
Q: Name the elements of Group 14.
Ans: Carbon, silicon, germanium, tin and lead are the elements of Group 14.
Q: Which element is the basis of organic chemistry?
Ans: Carbon is the basis of organic chemistry.
Q: What is catenation?
Ans: Catenation is the property of self-linking of atoms to form chains or rings.
Q: Which element shows maximum catenation?
Ans: Carbon shows maximum catenation.
Q: What are allotropes?
Ans: Allotropes are different forms of the same element existing in the same physical
state.
Q: Name two crystalline allotropes of carbon.
Ans: Diamond and graphite are two crystalline allotropes of carbon.
Q: Which allotrope of carbon is the hardest natural substance?
Ans: Diamond is the hardest natural substance.
Q: Which allotrope of carbon conducts electricity?
Ans: Graphite conducts electricity.
Q: Why does graphite conduct electricity?
Ans: Graphite conducts electricity due to the presence of free electrons.
Q: What is fullerene?
Ans: Fullerene is an allotrope of carbon containing carbon atoms arranged in cage-like
structures.
Q: What is the oxidation state commonly shown by Group 14 elements?
Ans: Group 14 elements commonly show +4 and +2 oxidation states.
Q: What is inert pair effect?
Ans: Inert pair effect is the tendency of the valence s-electrons to remain unshared
during bond formation.
Q: Which oxidation state becomes more stable down Group 14?
Ans: The +2 oxidation state becomes more stable down Group 14.
Q: Name one important compound of silicon.
Ans: Silicon carbide is an important compound of silicon.
Q: What is silicon carbide commonly known as?
Ans: Silicon carbide is commonly known as carborundum.
Q: What is the use of silicon in electronics?
Ans: Silicon is used as a semiconductor in electronic devices.
Q: Which oxide of carbon is poisonous?
Ans: Carbon monoxide is poisonous.
Q: Why is carbon monoxide poisonous?
Ans: Carbon monoxide combines with haemoglobin and reduces oxygen transport in
blood.
Q: What is dry ice?
Ans: Dry ice is solid carbon dioxide.
Q: State one use of dry ice.
Ans: Dry ice is used as a refrigerant.
Q: What is water glass?
Ans: Water glass is sodium silicate solution.
Q: What are silicones?
Ans: Silicones are synthetic polymers containing silicon and oxygen atoms.
Q: State one use of silicones.
Ans: Silicones are used as lubricants and water-proof materials.
Q: Why is diamond hard?
Ans: Diamond is hard because each carbon atom is covalently bonded to four other
carbon atoms in a three-dimensional network.
Q: Why does carbon form a large number of compounds?
Ans: Carbon forms a large number of compounds due to catenation and tetravalency.
II. Multiple Choice Questions (MCQs)
Q: The p-block elements belong to —
(a) Groups 1 and 2
(b) Groups 3 to 12
(c) Groups 13 to 18
(d) Lanthanoids only
Ans: (c) Groups 13 to 18
Q: p-block elements are so called because their valence electrons enter the —
(a) s-orbital
(b) p-orbital
(c) d-orbital
(d) f-orbital
Ans: (b) p-orbital
Q: Group 13 elements are known as the —
(a) Carbon family
(b) Nitrogen family
(c) Boron family
(d) Oxygen family
Ans: (c) Boron family
Q: Which of the following is a metalloid?
(a) Aluminium
(b) Boron
(c) Indium
(d) Thallium
Ans: (b) Boron
Q: The most abundant metal in the earth’s crust is —
(a) Iron
(b) Copper
(c) Aluminium
(d) Calcium
Ans: (c) Aluminium
Q: The common oxidation state of Group 13 elements is —
(a) +1
(b) +2
(c) +3
(d) +4
Ans: (c) +3
Q: Which ore is the chief source of aluminium?
(a) Haematite
(b) Bauxite
(c) Calamine
(d) Galena
Ans: (b) Bauxite
Q: Group 14 elements are known as the —
(a) Boron family
(b) Carbon family
(c) Halogen family
(d) Noble gas family
Ans: (b) Carbon family
Q: Which element is the basis of organic chemistry?
(a) Silicon
(b) Nitrogen
(c) Carbon
(d) Sulphur
Ans: (c) Carbon
Q: The property of self-linking of atoms is called —
(a) Allotropy
(b) Hybridisation
(c) Catenation
(d) Ionisation
Ans: (c) Catenation
Q: Which element shows maximum catenation?
(a) Silicon
(b) Carbon
(c) Germanium
(d) Tin
Ans: (b) Carbon
Q: Diamond and graphite are —
(a) Isotopes
(b) Isobars
(c) Allotropes of carbon
(d) Compounds of carbon
Ans: (c) Allotropes of carbon
Q: The hardest natural substance is —
(a) Graphite
(b) Silicon carbide
(c) Diamond
(d) Quartz
Ans: (c) Diamond
Q: Which allotrope of carbon conducts electricity?
(a) Diamond
(b) Graphite
(c) Charcoal
(d) Coke
Ans: (b) Graphite
Q: Graphite conducts electricity because it contains —
(a) Free protons
(b) Free neutrons
(c) Free electrons
(d) Free ions
Ans: (c) Free electrons
Q: Group 14 elements commonly show oxidation states —
(a) +1 and +2
(b) +2 and +4
(c) +3 and +5
(d) +1 and +3
Ans: (b) +2 and +4
Q: Inert pair effect refers to the tendency of valence electrons to remain —
(a) Excited
(b) Shared
(c) Unshared
(d) Ionised
Ans: (c) Unshared
Q: The +2 oxidation state becomes more stable down Group 14 due to —
(a) Catenation
(b) Hybridisation
(c) Inert pair effect
(d) Allotropy
Ans: (c) Inert pair effect
Q: Silica is chemically known as —
(a) Silicon carbide
(b) Silicon dioxide
(c) Sodium silicate
(d) Calcium silicate
Ans: (b) Silicon dioxide
Q: Silicon carbide is commonly known as —
(a) Quartz
(b) Silica gel
(c) Carborundum
(d) Water glass
Ans: (c) Carborundum
Q: Silicon is widely used as a —
(a) Fertiliser
(b) Semiconductor
(c) Oxidising agent
(d) Refrigerant
Ans: (b) Semiconductor
Q: Which oxide of carbon is poisonous?
(a) Carbon dioxide
(b) Carbon monoxide
(c) Silicon dioxide
(d) Sulphur dioxide
Ans: (b) Carbon monoxide
Q: Carbon monoxide is poisonous because it combines with —
(a) Chlorophyll
(b) Haemoglobin
(c) Plasma
(d) Water
Ans: (b) Haemoglobin
Q: Dry ice is —
(a) Frozen water
(b) Solid oxygen
(c) Solid carbon dioxide
(d) Solid nitrogen
Ans: (c) Solid carbon dioxide
Q: Water glass is —
(a) Calcium silicate
(b) Sodium silicate
(c) Potassium carbonate
(d) Silicon dioxide
Ans: (b) Sodium silicate
Q: Silicones are polymers containing —
(a) Carbon and hydrogen
(b) Silicon and oxygen
(c) Nitrogen and oxygen
(d) Sulphur and oxygen
Ans: (b) Silicon and oxygen
Q: Diamond is very hard because carbon atoms are arranged in —
(a) Linear chains
(b) Layered sheets
(c) Three-dimensional covalent network
(d) Simple cubic structure
Ans: (c) Three-dimensional covalent network
Q: Assertion (A): Boron differs from other Group 13 elements.
Reason (R): Boron has small size and no vacant d-orbitals.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A
Q: Assertion (A): Graphite conducts electricity.
Reason (R): Graphite contains delocalised electrons.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A
Q: Assertion (A): Diamond is the hardest natural substance.
Reason (R): Each carbon atom in diamond is bonded to four other carbon atoms.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A
Q: Assertion (A): Carbon shows maximum catenation.
Reason (R): Carbon-carbon bond is very stable.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A
Q: Assertion (A): Carbon monoxide is poisonous.
Reason (R): Carbon monoxide reduces oxygen-carrying capacity of blood.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A
Q: Assertion (A): Silicon is used in electronic devices.
Reason (R): Silicon acts as a semiconductor.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A
Q: Assertion (A): The +2 oxidation state becomes more stable down Group 14.
Reason (R): Inert pair effect increases down the group.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
Ans: (a) Both A and R are true and R is the correct explanation of A. 0 0 0
