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Important Questions

Study of the First Element - Hydrogen — Important Questions

ICSE · Class 9 · Chemistry

44 important questions from Study of the First Element - Hydrogen for ICSE Class 9 Chemistry, with answers. Part of the ICSE Class 9 Chemistry syllabus.

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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44 Questions·
multiple choicemultiple correcttrue falseorderingmatching

Important Questions from Study of the First Element - Hydrogen

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.

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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?
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 many important questions are there in Study of the First Element - Hydrogen?
Super Tutor has 44 practice questions for Study of the First Element - Hydrogen, including multiple choice, multiple correct, true false, ordering, matching questions. A sample with answers is on this page.

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

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