Class 9 Chemistry Competitive Exam MCQs – Practice Test 5 (Chapter 3)

Fundamentals of Chemistry MCQs with Answers PDF – Test 5

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Fundamentals of Chemistry MCQs PDF Download – Test 5

MCQ 21: Compounds have atoms of:

same sizes
different sizes
same electrons
different electrons

MCQ 22: An oxide ion has -2 charge because:

oxygen looses two electrons
oxygen gains two electrons
oxygen becomes neutral
oxygen gains 3 electrons

MCQ 23: Which of the following is present in vinegar?

10% acetic acid
5%acetic acid
7% acetic acid
8% acetic acid

MCQ 24: The molecular formula gives:

simplest ratio of atoms
actual whole number ratio of atoms
whole number ratio of atoms
natural number ratio of atoms

MCQ 25: 6.022 * 10²³ atoms of Sulphur contains:

2 moles
3 moles
4 moles
1 mole

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Chemical Reactivity MCQs

Structure of Atoms MCQs

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Physical States of Matter MCQs

Structure of Molecules MCQs

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