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Revision Notes

Practical Chemistry

ICSE · Class 10 · Chemistry

Quick revision notes for Practical Chemistry — ICSE Class 10 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

44 questions36 flashcards5 concepts

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A diagram illustrating the laboratory test for hydrogen gas, showing a burning splint producing a 'pop' sound when brought near the gas.
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Key Topics to Revise

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1. Basic Ideas in Practical Chemistry

  • A normal salt is made up of two radicals: a cation and an anion.
  • A positive charge bearing ion is called a cation while a negative charge bearing ion is called anion.
  • Cations are identified by reaction with alkalis or by specific reagents.
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2. Identification Tests for Gases

  • Ammonia turns moist red litmus blue and turns Nessler's reagent brown.
  • Carbon dioxide turns lime water milky and the milkiness disappears on passing excess carbon dioxide.
  • Carbon dioxide shows no effect on potassium dichromate solution or potassium permanganate solution.
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3. Tests for Cations Other Than Alkali Tests

  • Lead ion gives silver black precipitate with hydrogen sulphide, canary yellow with potassium iodide, mustard yellow with potassium chromate, and white precipitate with hydrochloric acid.
  • Copper ion gives black precipitate with hydrogen sulphide and chocolate brown precipitate with potassium ferrocyanide.
  • Ferrous ion gives Turnbull blue colour with potassium ferricyanide and fails to give blood red colour with KCNS.
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4. Tests for Cations Based on Alkalis

  • Ammonium ion gives ammonia gas when heated with caustic soda solution.
  • Lead ion gives white lead hydroxide with sodium hydroxide, and the precipitate dissolves in excess sodium hydroxide.
  • With ammonium hydroxide, lead ion gives white precipitate that is insoluble in excess.

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Full Notes

Key Concepts

A cation is a positively chargedThe homogeneous mixture of saltDifferent gases are recognised by theirHeating ammonium salts with sodium hydroxideLead ion gives silver black precipitate

Frequently Asked Questions

What are the important topics in Practical Chemistry for ICSE Class 10 Chemistry?
Practical Chemistry covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Practical Chemistry — ICSE Class 10 Chemistry?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All 11 chapters — ICSE Class 10 Chemistry Revision Notes

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