1. Assertion: One mole of any substance contains 6.022×10 23 particles. Reason: Avogadro constant represents the number of particles present in one mole of a substance.

📘 Assertion–Reason Analysis

🔵 Assertion

One mole of any substance contains 6.022 × 10²³ particles.

This statement is True. One mole of a substance contains Avogadro's number of elementary entities.

Depending on the substance, these particles may be atoms, molecules, ions, or other specified entities.

🟠 Reason

Avogadro constant represents the number of particles present in one mole of a substance.

This statement is also True. The Avogadro constant is approximately:

N_A = 6.022 × 10²³ mol⁻¹

It tells us how many elementary entities are present in one mole.

🎬 Avogadro Constant Animation

Particle Particle Particle Particle → 1 mol

1 mol = 6.022 × 10²³ particles

The animation represents the relationship between one mole and Avogadro's number.

🔗 Conceptual Relationship

1 mole → 6.022 × 10²³ particles

Therefore, the Reason directly explains the Assertion.

🧮 Simple Example

For 1 mole of H₂O:

1 mol H₂O = 6.022 × 10²³ H₂O molecules

Similarly, 1 mole of Na contains 6.022 × 10²³ sodium atoms.

✅ Final Answer

Both Assertion and Reason are TRUE, and Reason is the correct explanation of Assertion.

🎯 Key Concept

N_A = 6.022 × 10²³ mol⁻¹

1 mole = 6.022 × 10²³ particles