Class 9th Science (DPP) - Atoms and Molecules

Description

🧪 Quiz Title: Atoms and Molecules – Daily Practice Problems (DPP)

Subject: Science | Class: 9
Chapter: Atoms and Molecules

🕐 Quiz Format:

• Total Questions: 15

• Question Type: Multiple Choice Questions (MCQs)

• Difficulty Level: Easy to Moderate

• Time Limit: 30 minutes

  🧭 Topics Covered:

  1. Laws of Chemical Combination

  2. Dalton’s Atomic Theory

  3. Atoms, Molecules, and Ions

  4. Writing Chemical Formulae

  5. Molecular and Atomic Mass

  6. Mole Concept and Numerical Problems

     📘 Description:

     This quiz is designed to test your understanding of the fundamental concepts from Chapter 3 – Atoms and Molecules (CBSE Class 9 Science).
     It includes conceptual, numerical, and reasoning-based questions that cover the laws of chemical combination, Dalton’s atomic theory, atomic symbols, atomic and molecular masses, and mole concept.

     🎯 Learning Objectives:

     By attempting this quiz, students will be able to:

     • Understand the basic laws of chemical combination (Law of Conservation of Mass and Law of Constant Proportion).

     • Recall Dalton’s postulates of the atomic theory.

     • Identify chemical symbols and formulae of elements and compounds.

     • Perform simple calculations using atomic mass, molecular mass, and Avogadro’s number.

     • Apply the mole concept in solving numerical problems.