EV Class 9-10 Chemistry Guide | Complete SSC Notes, MCQs, CQs & Solutions | FreeLearning365

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⚗️ EV · SSC · Class 9-10 · NCTB Aligned

🧪 Chemistry Guide — Complete & Interactive

Master every chapter with notes, MCQs, CQs, and visual learning tools.

📚 All Chapters (click to jump to detail below)

🔽 Scroll down to explore Chapter One interactive detail with MCQs, CQs, and more.

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✨ Chapter One: Concepts of Chemistry

Interactive notes, MCQs, Creative Questions & Board patterns.

📖 Core Concepts of Chemistry

🔹 What is Chemistry?

Chemistry is the branch of science that studies the composition, structure, properties, and changes of matter. It bridges physics with other natural sciences.

🔹 Branches of Chemistry

Organic, Inorganic, Physical, Analytical, Biochemistry, and Environmental Chemistry.

🔹 Matter & Its Classification

Matter is anything that has mass and occupies space. Classified as elements, compounds, and mixtures.

🔹 Atoms & Molecules

Atom = smallest particle of an element. Molecule = group of two or more atoms bonded together.

🔹 Chemical Symbols & Formulae

Symbols represent elements (e.g., H, O, Na). Formulae represent compounds (e.g., H₂O, NaCl).

🔹 Valency & Chemical Bonding

Valency = combining capacity of an atom. Bonds: Ionic, Covalent, Metallic.

💡 Did you know? Chemistry is often called the "central science" because it connects physics with other natural sciences like biology and geology.

🔬 MCQ Practice (with instant feedback)

📌 Creative Question 1: Chemical Formula

Write the chemical formula for Sodium Chloride and explain the bonding involved.

a) What is the formula?
b) Which type of bond is present?
c) Draw the electron dot structure.
d) Why is it called an ionic compound?

Solution (a): NaCl — Sodium Chloride.

Solution (b): Ionic bond (electrovalent bond) formed by transfer of electron from Na to Cl.

📌 Creative Question 2: Valency

An element X has atomic number 12. Determine its valency and write the formula of its oxide.

a) Electronic configuration?
b) Valency?
c) Formula of oxide?
d) Is it metal or non-metal?

Solution: Atomic number 12 → 2,8,2 → Valency = 2 → Oxide = XO (e.g., MgO).

📌 Creative Question 3: Mixtures vs Compounds

Distinguish between a mixture and a compound with examples.

a) Definition of each.
b) Two points of difference.
c) Examples.
d) Can components be separated by physical methods?

🎯 Last Decade Board Recurrence

• ⭐⭐⭐⭐⭐ Valency & chemical formula
• ⭐⭐⭐⭐⭐ Types of bonds (ionic/covalent)
• ⭐⭐⭐⭐⭐ Difference: mixture vs compound
• ⭐⭐⭐⭐ Electronic configuration
• ⭐⭐⭐⭐ Branches of chemistry
• ⭐⭐⭐⭐⭐ Symbols & formulae
• ⭐⭐⭐⭐ Matter classification

⭐ Top 15 Exam Focus Questions

1. What is chemistry? Define its scope.
2. List the main branches of chemistry.
3. What is matter? How is it classified?
4. Define atom and molecule.
5. What is a chemical symbol? Give examples.
6. What is a chemical formula? Write the formula for water.
7. What is valency? How is it determined?
8. Differentiate between ionic and covalent bonds.
9. What is a compound? Give three examples.
10. What is a mixture? Give two examples.
11. Difference between mixture and compound.
12. What is the electronic configuration of sodium (Na, Z=11)?
13. Why is chemistry called the "central science"?
14. What is the valency of oxygen? Write the formula of water.
15. Define: element, compound, mixture with examples.

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