Padhai STEM Practice Questions →
NCERT Solutions › Chemistry › Chapter 10

Chapter 10: s-Block Elements

NCERT Solutions for CBSE Class 10 Chemistry — 9 solved questions with detailed explanations.

9
Questions
0
Topics

Solved Questions

Q1. The alkali metal with the lowest ionization energy is:

Difficulty: Easy · Topic: Alkali Metals

Solution

IE decreases down the group. Cs has the largest atomic radius and lowest IE among stable alkali metals.

Q2. The flame color of sodium is:

Difficulty: Easy · Topic: Flame Test

Solution

Sodium gives a bright yellow flame due to the 3p → 3s transition (589 nm D line).

Q3. The lightest metal is:

Difficulty: Easy · Topic: s-Block Elements

Solution

Lithium.

Q4. Sodium is stored in:

Difficulty: Easy · Topic: s-Block Elements

Solution

kerosene.

Q5. CaO is commonly known as:

Difficulty: Easy · Topic: s-Block Elements

Solution

quicklime.

Q6. Ca(OH)₂ is commonly known as:

Difficulty: Easy · Topic: s-Block Elements

Solution

slaked lime.

Q7. Plaster of Paris is:

Difficulty: Easy · Topic: s-Block Elements

Solution

CaSO₄·½H₂O.

Q8. The diagonal relationship exists between:

Difficulty: Easy · Topic: s-Block Elements

Solution

Li-Mg and Be-Al.

Q9. Which of the following is the strongest base?

Difficulty: Easy-Medium · Topic: Base Strength

Solution

Base strength of alkali metal hydroxides increases down the group. CsOH is the strongest base.

Other Chapters in Chemistry

Ch 1: Some Basic ConceptsCh 2: Structure of AtomCh 3: Classification of ElementsCh 4: Chemical BondingCh 5: States of MatterCh 6: ThermodynamicsCh 7: EquilibriumCh 8: Redox ReactionsCh 9: HydrogenCh 11: p-Block ElementsCh 12: Organic ChemistryCh 13: HydrocarbonsCh 14: Environmental Chemistry

Want to practice these questions interactively?

Get instant feedback, track progress, and improve with adaptive practice.

Start Practicing Free →