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Hydrogen and s - block Elements

Telangana Open School (TOSS) · Class 12 · Chemistry

Most important questions from Hydrogen and s - block Elements for Telangana Open School (TOSS) Class 12 Chemistry board exam 2026. MCQs, short answer, and long answer questions with marks.

46 questions30 flashcards4 concepts

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46 Questions·
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Sample Questions

1multiple choice
1 marks

Which of the following is a use of hydrogen?

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Making ammonia

Hydrogen is used in the Haber process to manufacture ammonia.

2multiple choice
1 marks

Which alkali metal forms only monoxide when burned in air?

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Lithium

Lithium forms only lithium oxide (Li₂O) on combustion in air.

3multiple choice
1 marks

What is the oxidation state of oxygen in hydrogen peroxide?

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-1

In H₂O₂, oxygen has an oxidation state of -1, intermediate between O₂ (0) and H₂O (-2).

4multiple choice
1 marks

Which of the following is a use of heavy water?

Show answer

As a moderator in nuclear reactors

Heavy water slows down neutrons in nuclear reactors and is used as a moderator.

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Frequently Asked Questions

What are the important topics in Hydrogen and s - block Elements for Telangana Open School (TOSS) Class 12 Chemistry?
Hydrogen and s - block Elements covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Hydrogen and s - block Elements — Telangana Open School (TOSS) Class 12 Chemistry?
Understand the core concepts first, then work through the 46 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 Hydrogen and s - block Elements?
There are 46 practice questions available for Hydrogen and s - block Elements. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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