Class 9 Chemistry MCQs - Chapter 3

Fundamentals of Chemistry Multiple Choice Questions PDF Download - 5

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Fundamentals of Chemistry Questions & Answers PDF Download: MCQ Quiz 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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