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Study of the First Element - Hydrogen — Syllabus

ICSE · Class 9 · Chemistry

What Study of the First Element - Hydrogen covers in ICSE Class 9 Chemistry: 4 topics, for the 2026-27 session.

44 questions40 flashcards9 formulas & key relations5 concepts

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An infographic illustrating hydrogen's similarities to both Group 1 (alkali metals) and Group 17 (halogens) elements, explaining why its position is unique and debated.
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4 Topics · ICSE Class 9 Chemistry · 2026-27

Topics in Study of the First Element - Hydrogen

1

Position, nature, and discovery of hydrogen

  • Hydrogen is the first element of the periodic table.
  • Its atomic number is 1 and electronic configuration is 1 in the K shell.
  • It is placed in the 1st Period and Group 1A.
2

Hydrogen from water, acids, and alkalis

  • Hydrogen can be prepared from water, dilute acids, and alkalis.
  • Cold water reacts with potassium, sodium, and calcium.
  • Potassium floats on water, melts at 62°C, and burns with a lilac flame.
3

Laboratory preparation, purification, and collection of hydrogen

  • Granulated zinc and dilute hydrochloric acid or dilute sulphuric acid are used in the laboratory preparation of hydrogen.
  • Zinc granules are preferred over pure zinc because copper impurity acts as a catalyst.
  • The gas is collected by downward displacement of water.
4

Industrial preparation, properties, and uses of hydrogen

  • Hydrogen is manufactured by the Bosch process and by electrolysis of acidulated water.
  • In the Bosch process, steam is passed over hot coke at 1000°C to form water gas.
  • Water gas is a mixture of carbon monoxide and hydrogen.

Key Concepts

Central concept: Hydrogen

Position in periodic tableDiscovery and namingOccurrencePreparation from waterActivity seriesPreparation from dilute acidsPreparation from alkalisLaboratory preparation

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Frequently Asked Questions

What are the important topics in Study of the First Element - Hydrogen for ICSE Class 9 Chemistry?
Key topics in Study of the First Element - Hydrogen include Position, nature, and discovery of hydrogen, Hydrogen from water, acids, and alkalis, Laboratory preparation, purification, and collection of hydrogen, Industrial preparation, properties, and uses of hydrogen. Study these first, then practise questions on each for Class 9 exams.
How should I revise Study of the First Element - Hydrogen for Class 9 exams?
Learn the core ideas first, then work through the 44 practice questions on Study of the First Element - Hydrogen. Revise 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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