NCERT Class 9 Science Chapter 9 Atomic Foundations of Matter Test Mock Test
This free online test covers Chapter 9, Atomic Foundations of Matter, from the NCERT Class 9 Exploration textbook. The 30 questions are written directly from the chapter — definitions, processes, worked examples and the points the book italicises — so a score here tells you how much of the chapter actually stuck, not how well you guess. Each answer carries an explanation that says why the right option is right and why the other three fail, which is where most of the learning happens. Attempt it after your first read of the chapter, then again before the exam. There is no negative marking, and you can review the full solution the moment you submit.
Duration
30 mins
Questions
30 MCQs
Total Marks
30 pts
Negative
0 per wrong
Topics Covered in This Paper
Sample Questions
Q1.In Activity 9.2, why does the mass appear to change when baking soda is added to vinegar in an open conical flask?
- AThe carbon dioxide produced escapes from the flask, so it is not weighed with the products
- BThe reaction absorbs mass from the surrounding air
- CThe digital balance cannot register the mass of a liquid once it starts fizzing
- DSome of the vinegar is destroyed during the reaction and ceases to exist
Q2.How does the chapter state the Law of Conservation of Mass, and who proposed it?
- AMatter can neither be created nor destroyed in a chemical reaction; proposed by Joseph Proust in 1789
- BElements combine in a fixed ratio by mass; proposed by Antoine Lavoisier in 1789
- CAtoms combine in the ratio of simple whole numbers; proposed by John Dalton in 1789
- DMatter can neither be created nor destroyed in a chemical reaction; proposed by Antoine Lavoisier in 1789
Q3.In Example 9.1, 4.0 g of calcium carbonate reacts with 2.92 g of hydrochloric acid in a closed container, giving 1.76 g of carbon dioxide, 0.72 g of water and 4.44 g of calcium chloride. What does this show?
- ABoth reactants and products total 6.92 g, so the Law of Conservation of Mass is obeyed
- BThe law cannot be tested here because a gas is among the products
- CThe reactants total 6.92 g and the products 6.20 g, so the law is disobeyed
- DThe products weigh more than the reactants, since a gas is formed
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Disclaimer: The questions provided here are extracted and digitized from previous year papers using automated processes. They may contain typographical errors, formatting issues, or minor variations from the actual examination paper. While we have done our best to verify the accuracy of the official answer keys, discrepancies may occasionally exist. Please refer to the official commission website for the most authentic paper.
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FAQ
Frequently asked questions
Frequently Asked Questions
- How many questions are in the NCERT Class 9 Science Chapter 9 Atomic Foundations of Matter Test mock test?
- This paper has 30 multiple-choice questions carrying 30 marks in total, to be attempted in 30 minutes.
- Is the NCERT Class 9 Science Chapter 9 Atomic Foundations of Matter Test mock test free to attempt?
- Yes. You can attempt the full paper online for free on AI Test Planet, and see your score and correct answers immediately after submitting.
- Does this paper have negative marking?
- No, there is no negative marking on this paper, so an attempted guess costs you nothing.
- Are solutions and explanations available?
- Yes. After you submit, every question shows the correct answer with a step-by-step explanation, along with a topic-wise breakdown of your performance.