MCQs in board exams are mostly based on these topics:

1. Basic Concepts

• Who proposed the periodic table? (Mendeleev)

• What is the modern periodic table based on? (Atomic number)

• How many periods and groups are in the periodic table?

• What are periods and groups?

2. Blocks of the Periodic Table

• Which block are alkali metals in? (s-block)

• Which block are halogens in? (p-block)

• Which block are transition metals in? (d-block)

• Which block are lanthanides and actinides in? (f-block)

3. Electron Configuration

• What is the electron configuration of Na? (1s² 2s² 2p⁶ 3s¹)

• What is the electron configuration of Cl? (1s² 2s² 2p⁶ 3s² 3p⁵)

• How many valence electrons does Group 1 elements have? (1)

• How many valence electrons does Group 17 elements have? (7)

4. Periodic Trends

• Which element has the largest atomic radius in a period? (Alkali metal)

• Which element has the smallest atomic radius in a period? (Halogen)

• Ionization energy increases across a period: True or False?

• Electronegativity decreases down a group: True or False?

5. Metals, Non-Metals, Metalloids

• Which elements are metals? (Left side of periodic table)

• Which elements are non-metals? (Right side of periodic table)

• What is an example of a metalloid? (Silicon, Germanium)

• Where are metalloids located? (Between metals and non-metals)

6. Properties of Groups

• Group 1 elements are called: (Alkali metals)

• Group 17 elements are called: (Halogens)

• Group 18 elements are called: (Noble gases)

• Which group is most reactive? (Group 1 and Group 17)

7. Oxides and Hydroxides

• Na₂O is a basic oxide: True or False?

• CO₂ is an acidic oxide: True or False?

• What is the pH of the solution formed when basic oxide reacts with water? (pH > 7)

• What is the pH of the solution formed when acidic oxide reacts with water? (pH < 7)

• Al₂O₃ is an example of: (Amphoteric oxide)

8. Ionization Energy and Electron Affinity

• Which element has the highest ionization energy in a period? (Noble gas)

• Which element has the lowest ionization energy in a period? (Alkali metal)

• Which group has the highest electron affinity? (Group 17 / Halogens)

9. Reactions of Elements

• Na reacts with water to form: (NaOH + H₂)

• Mg reacts with oxygen to form: (MgO)

• Na reacts with chlorine to form: (NaCl)

• Mg reacts with chlorine to form: (MgCl₂)

10. Oxidation States

• What is the oxidation state of Na in NaCl? (+1)

• What is the oxidation state of Mg in MgCl₂? (+2)

• What is the oxidation state of O in Na₂O? (-2)

• What is the oxidation state of Cl in NaCl? (-1)