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Nitrogen and Oxygen Families MCQs for Competitive Exams

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Nitrogen and Oxygen Families MCQs for Competitive Exams

Practice with answers, explanations, and exam-focused revision notes.

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Topic Notes: Nitrogen and Oxygen Families

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Nitrogen and Oxygen Families MCQs in Chemistry are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

Attempt the questions page by page, check the correct answers, read the explanations where available, and compare your weak areas with past papers and mock test performance. Consistent MCQ practice improves speed, confidence, and retention for objective exam sections.

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21
Which gas reacts with lime water to produce a milky appearance?
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22
Which inert gas is commonly used to fill electric light bulbs to prevent filament oxidation?
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23
In chemical notation, what does the expression '2O' represent?
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24
In what medium is white phosphorus typically stored to ensure safety?
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25
What is the atomicity of a standard phosphorus molecule?
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26
What is the etymological origin of the element name 'Sulphur'?
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27
Which substance is commonly referred to as 'Dry Ice'?
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28
Why is nitrogen gas commonly used to fill electric light bulbs?
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29
What is the common chemical name for 'Oil of Vitriol'?
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30
What is the chemical composition of bleaching powder?
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