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Important Questions

Study of the First Element - Hydrogen

ICSE · Class 9 · Chemistry

Most important questions from Study of the First Element - Hydrogen for ICSE Class 9 Chemistry board exam 2026. MCQs, short answer, and long answer questions with marks.

44 questions40 flashcards5 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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44 Questions·
multiple choicemultiple correcttrue falseorderingmatching

Sample Questions

1multiple correct

Which groups does hydrogen resemble due to its dual nature?

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Group IA (Alkali metals), Group VIIA (Halogens)

Hydrogen shows dual nature - it resembles alkali metals (Group IA) because both have one valence electron, and halogens (Group VIIA) because both need one electron to complete their outer shell.

2true false

Hydrogen burns with a 'pop' sound when mixed with air.

Show answer

True

When hydrogen mixed with air (oxygen) is ignited, it burns explosively with a characteristic 'pop' sound. This is the test for hydrogen gas.

3ordering

Arrange the following in order of increasing reactivity with water: Iron, Sodium, Zinc, Potassium

4multiple correct

Which acids can be used for laboratory preparation of hydrogen? (Select all correct)

Show answer

Dilute hydrochloric acid, Dilute sulphuric acid

Only dilute HCl and dilute H₂SO₄ are used. Nitric acid is not used because it's a strong oxidizing agent and oxidizes the hydrogen produced back to water.

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Frequently Asked Questions

What are the important topics in Study of the First Element - Hydrogen for ICSE Class 9 Chemistry?
Study of the First Element - Hydrogen covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Study of the First Element - Hydrogen — ICSE Class 9 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.
How many important questions are there in Study of the First Element - Hydrogen?
There are 44 practice questions available for Study of the First Element - Hydrogen. These cover multiple question types including MCQs, short answer, and long answer questions.

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

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