Chemistry Class 9 Chapter 7: Electrochemistry

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• Class 9
• Chemistry
• Chapter 7
• FBISE SSC-I

Chapter summary

Chapter 7 of Chemistry for Class 9 is called "Electrochemistry". It covers 10 learning outcomes of the Federal Board syllabus. You will learn to: define redox reactions as simultaneous oxidation and; use roman numerals to indicate oxidation number of an. Parhayi.com has 659 MCQs, 107 short questions and 16 long questions for this chapter.

Topics in this chapter

• Define redox reactions as simultaneous oxidation and…
• Use roman numerals to indicate oxidation number of an…
• Identify oxidizing and reducing agents in a redox reaction
• Recognize that the oxidation number of elements in their…
• Derive the formula of ionic compounds from ionic charges…
• Identify that the oxidation number of monatomic ion is…
• Explain that the sum of the oxidation numbers in a…
• Explain that the sum of the oxidation numbers in an ion…
• Identify redox reactions by the colour changes involved…
• Define corrosion and discuss methods to prevent it.…

Sample questions

Try these questions from the chapter. The answers are for Premium students.

1. Differentiate between oxidation and reduction. (Give at least three comparison points for each.) (3 marks)
2. When Sui gas (methane) burns, CH₄ + 2O₂ → CO₂ + 2H₂O + heat. Identify the oxidation and the reduction in terms of oxygen and hydrogen. (3 marks)
3. Why is stainless steel used for cutlery, kitchen sinks and surgical instruments? (3 marks)

What Premium gives you in this chapter

• 659 MCQs with answers and explanations
• 107 short questions with full answers
• 16 long questions with answers
• 13 Learn cards
• 30 Activities and games
• chapter tests that show your weak topics

Chemistry is the study of matter and how it changes. Learn the definitions first, then practise equations, balancing and numericals until they feel easy.