MCQs on Class 11 Chemistry Chapter 3 – Classification of Elements and Periodicity in Properties are crucial for exam preparation. This chapter is worth 6 marks in the annual exam and helps in understanding fundamental chemistry concepts that will be used throughout the course. To master the topics in this chapter, solving multiple-choice questions (MCQs) is a great way to practice. It allows students to spot areas where they need improvement and focus on them. In this article, we provide important MCQs for CBSE Class 11 Chemistry Chapter 3, based on the latest syllabus. These questions have been crafted by experienced teachers. You can read and download the questions and answers in PDF format for your exam practice.
Class 12 Classification of Elements and Periodicity in Properties MCQs
1. Which of the following is a correct order of the atomic radius?
a) F > Cl > Br > I
b) I > Br > Cl > F
c) F > I > Br > Cl
d) Cl > F > I > Br
Answer: b) I > Br > Cl > F
2. The periodic table is arranged according to increasing atomic:
a) Mass
b) Number
c) Weight
d) Size
Answer: b) Number
3. The element with the highest electronegativity is:
a) Fluorine
b) Oxygen
c) Nitrogen
d) Chlorine
Answer: a) Fluorine
4. Which of the following is an example of an alkali metal?
a) Sodium
b) Calcium
c) Magnesium
d) Iron
Answer: a) Sodium
5. Which of the following is the correct trend for ionization energy in the periodic table?
a) Ionization energy decreases down a group
b) Ionization energy increases down a group
c) Ionization energy remains the same across a period
d) Ionization energy decreases across a period
Answer: a) Ionization energy decreases down a group
6. Which of the following elements has the smallest atomic radius?
a) Lithium
b) Carbon
c) Sodium
d) Neon
Answer: d) Neon
7. Which of the following elements is a noble gas?
a) Argon
b) Oxygen
c) Nitrogen
d) Carbon
Answer: a) Argon
8. Which of the following groups contains the halogens?
a) Group 1
b) Group 2
c) Group 17
d) Group 18
Answer: c) Group 17
9. Which of the following statements is correct about the periodic trends?
a) Electronegativity increases from left to right across a period
b) Electronegativity decreases as you move up a group
c) Electronegativity increases from top to bottom in a group
d) Electronegativity is constant across a period
Answer: a) Electronegativity increases from left to right across a period
10. Which of the following statements is true about the periodic table?
a) Metals are found on the right side of the periodic table
b) Non-metals are found on the left side of the periodic table
c) Elements in the same group have similar chemical properties
d) All of the above
Answer: c) Elements in the same group have similar chemical properties
11. The ionization energy of elements generally:
a) Decreases across a period
b) Increases across a period
c) Decreases down a group
d) Increases down a group
Answer: b) Increases across a period
12. Which of the following elements has the highest ionization energy?
a) Lithium
b) Oxygen
c) Chlorine
d) Helium
Answer: d) Helium
13. Which of the following is the correct order of the electron affinity?
a) Cl > F > O > N
b) F > Cl > O > N
c) O > F > Cl > N
d) N > O > F > Cl
Answer: b) F > Cl > O > N
14. Which of the following elements has the largest atomic radius?
a) Oxygen
b) Nitrogen
c) Lithium
d) Fluorine
Answer: c) Lithium
15. The electron affinity of an element is:
a) The energy released when an electron is added to an atom
b) The energy required to remove an electron from an atom
c) The energy required to add two electrons to an atom
d) The energy released when an atom loses an electron
Answer: a) The energy released when an electron is added to an atom
16. Which of the following is true for transition metals?
a) They have low melting points
b) They form colored compounds
c) They have low densities
d) They are poor conductors of electricity
Answer: b) They form colored compounds
17. Which of the following elements is a transition metal?
a) Calcium
b) Copper
c) Sodium
d) Potassium
Answer: b) Copper
18. Which of the following statements is correct about the atomic radius of elements?
a) The atomic radius increases as you move from top to bottom within a group
b) The atomic radius decreases as you move from left to right across a period
c) The atomic radius increases as you move from left to right across a period
d) Both a and b are correct
Answer: d) Both a and b are correct
19. Which of the following is the correct order of electronegativity?
a) F > Cl > Br > I
b) I > Br > Cl > F
c) Cl > F > Br > I
d) F > O > N > C
Answer: a) F > Cl > Br > I
20. Which of the following has the highest electron affinity?
a) Chlorine
b) Fluorine
c) Oxygen
d) Nitrogen
Answer: b) Fluorine
21. Which of the following elements has the smallest electronegativity?
a) Sodium
b) Chlorine
c) Oxygen
d) Fluorine
Answer: a) Sodium
22. Which of the following elements belongs to the p-block of the periodic table?
a) Sodium
b) Magnesium
c) Boron
d) Calcium
Answer: c) Boron
23. Which of the following is the most reactive alkali metal?
a) Sodium
b) Potassium
c) Lithium
d) Rubidium
Answer: b) Potassium
24. The periodic law states that the properties of elements are periodic functions of their:
a) Atomic number
b) Atomic mass
c) Atomic size
d) Chemical properties
Answer: a) Atomic number
25. Which of the following elements has the highest first ionization energy?
a) Beryllium
b) Boron
c) Carbon
d) Oxygen
Answer: d) Oxygen
26. Which of the following is a characteristic of noble gases?
a) They are highly reactive
b) They are non-metallic
c) They have a full outer electron shell
d) They are radioactive
Answer: c) They have a full outer electron shell
27. Which of the following has the smallest ionization energy?
a) Sodium
b) Magnesium
c) Oxygen
d) Neon
Answer: a) Sodium
28. The trend of atomic size in a group is:
a) Increases as we move down
b) Decreases as we move down
c) Remains constant
d) Increases as we move up
Answer: a) Increases as we move down
29. Which of the following elements is a part of the lanthanide series?
a) Uranium
b) Neodymium
c) Technetium
d) Radon
Answer: b) Neodymium
30. Which of the following elements has the highest atomic number in period 3?
a) Sodium
b) Magnesium
c) Phosphorus
d) Argon
Answer: d) Argon
