📘 Short Answer Questions – Chemistry
Q1. Define oxidation, reduction reactions with examples.
Q2. Define oxidizing agent and reducing agent with examples.
Q3. Write down 5 differences between oxidation and reduction.
Q4. Write down 3 examples of each of oxidizing and reducing agent.
Q5. Identify the oxidizing and reducing agents from the following: (i) Al (RA) (ii) Na (RA) (iii) H₂S (RA) (iv) H₂SO₄ (OA) (v) KMnO₄ (OA) (vi) Zn (RA)
Q6. Identify the oxidizing and reducing agents for the following reaction: H₂ (RA) + Cl₂ (OA) → 2HCl
Q7. Describe the construction of electrochemical cell. Write names of two types of electrochemical cells.
Q8. Differentiate between electrolytes and non-electrolytes with examples.
Q9. Differentiate between strong electrolytes and weak electrolytes with examples.
Q10. Identify strong and weak electrolytes from the following: HCl (S), KI (S), NaOH (S), H₂S (W), CH₃COOH (W), NH₄OH (W), NaCl (S), C₂H₅OH (W)
Q11. Why ionic compounds conduct electricity in molten or in aqueous solutions only?
Q12. What is electrolytic cell? Explain with diagram. Describe the construction and working of electrolytic cell.
Q13. Sketch electrolytic cell for electrolysis of molten potassium chloride and identify cathode and anode, oxidation, reduction reaction, movement of electron.
Q14. Define electrochemistry, electrochemical reactions, electrochemical cell, electrolyte, non-electrolyte, salt bridge, cell, Galvanic cell, electrolytic cell, battery, electrode, cathode, anode, oxidation, reduction, redox reactions, electrochemical equivalent, and chemical equivalent.
Q15. What is electroplating? On which principle this process works? Give its merits.
Q16. What is corrosion of metal and rusting? How it can be prevented? Or name the methods which are used to protect metal from corrosion. How cathodic protection prevent metal from corrosion?
Q17. Write down 4 applications of electrolytic cells or electrolysis.
Q18. Describe the process of nickel plating and tin plating.
Q19. Write down the composition of following alloys: Brass (Cu-Zn,[4:1]), Bronze (Cu-Sn-Zn,[9:1]), Bell metal (Cu-Sn), Monel (Ni-Cu-Fe), Amalgam (Hg-Ag-Cu-Zn), Pewter (Sn-Cu-Pb-Sb-Bi), White gold (Au-Pb-Ag-Cu, 18 karat), Duralumin (Al-Cu-Mg-Ni).
🧪 Long Answer Questions – Chemistry
Q1. State and explain Faraday’s Laws of electrolysis.
Q2. Describe the construction and working of Daniell cell and lead battery.
Q3. Describe the dry cell with diagram.
Q4. What is battery? How lead storage battery works?
Q5. Explain the process of electrolysis in electrolytic cell.
Q6. What is alloy? Explain its classification with examples.
Q7. What is electroplating? How steel object can be electroplated with zinc and silver?
Q8. Examine the following chemical equations and identify oxidation, reduction, oxidizing agent, reducing agent:
(a) Zn (RA) + Cl₂ (OA) → ZnCl₂ (Zn oxidized, Cl₂ reduced)
(b) H₂S (RA) + Br₂ (OA) → 2HBr + S (H₂S oxidized, Br₂ reduced)
(c) 2Ca (RA) + O₂ (OA) → CaO (Ca oxidized, O₂ reduced)
(d) 2Li (RA) + S (OA) → Li₂S (Li oxidized, S reduced)
Q9. Identify the alloy:
• Cu‑Zn → Brass
• Cu‑Al‑Mg‑Ni → Duralumin
• Cu‑Zn‑Sn → Bronze
• Fe‑Al‑Ni‑Co → Alnico
• Cu‑Ni‑Mn → Cupronickel
🎯 Q10. Pick up the Correct Answer (MCQs)
1️⃣ Alloy of Cu–Sn is called
2️⃣ Which one is alloy?
3️⃣ Value of 1 Faraday is equal to
4️⃣ Which one is non electrolyte?
5️⃣ Which one is oxidizing agent?
6️⃣ Which one is reducing agent?
7️⃣ Which one forms weak electrolyte solution with water?
8️⃣ In Daniel cell, cathode is
9️⃣ 1 g equivalent weight of Al is equal to
🔟 Steel is an alloy of iron which contains:
1️⃣1️⃣ The substance used for electrolysis is called …
1️⃣2️⃣ When molten NaCl is electrolyzed, formed at cathode is …
1️⃣3️⃣ The electrolyte in lead storage battery is …
1️⃣4️⃣ Lead storage battery is a … cell.
1️⃣5️⃣ Dry cell is a … cell.
1️⃣6️⃣ Daniell cell is a … cell.
1️⃣7️⃣ The unit of Z is …
1️⃣8️⃣ Electrolytic conduction is also known as …
1️⃣9️⃣ Z is called as …
2️⃣0️⃣ Correct statement …
2️⃣1️⃣ The substance used for electrolysis is called …
2️⃣2️⃣ When molten NaCl is electrolyzed, formed at cathode is …
2️⃣3️⃣ The electrolyte in lead storage battery is …
2️⃣4️⃣ Lead storage battery is a … cell.
2️⃣5️⃣ Dry cell is a … cell.
2️⃣6️⃣ Daniell cell is a … cell.
2️⃣7️⃣ The unit of Z is …
2️⃣8️⃣ Electrolytic conduction is also known as …
2️⃣9️⃣ Z is called as …
3️⃣0️⃣ Alloy formation prevents corrosion by reducing ability of …
3️⃣1️⃣ Process using current for non spontaneous redox reaction …
3️⃣2️⃣ Cell used to carry out spontaneous redox reaction …
3️⃣3️⃣ Cell producing current from spontaneous redox reaction …
3️⃣4️⃣ Electrolysis of acidified water gives …
3️⃣5️⃣ Electrochemical reactions involve …
3️⃣6️⃣ Positive ions move towards …
3️⃣7️⃣ Negative ions move towards …
3️⃣8️⃣ Cathodic protection uses which metal as anode …
3️⃣9️⃣ Best conductor of electricity when molten …
4️⃣0️⃣ Added to water to make good conductor …
4️⃣1️⃣ When molten NaCl is electrolyzed, formed at anode is …
4️⃣2️⃣ Splitting of aqueous NaCl into ions is called …
4️⃣3️⃣ Ionization is …
4️⃣4️⃣ Substance through which current flows without change in composition …
4️⃣5️⃣ Substance conducting electricity in molten/solution state …
4️⃣6️⃣ Which one is NOT a strong electrolyte?
4️⃣7️⃣ Which one is a strong electrolyte?
4️⃣8️⃣ Which one is a weak electrolyte?




