What statement about nitrogen is consistent with its...

What statement about nitrogen is consistent with its chemistry? (1) It makes up $78 \%$ of the earth's atmosphere by volme (2) It is a colourless, odourless, tasteless gas. (3) It readily reacts with hydrogen to form $\mathrm{NH}_{3}$ that is used in fertilizers (4) It is the most volatile component of liquid air with a boiling point of $-196^{\circ} \mathrm{C}$. (a) $1,2,3$ (b) $2,33,4$ (c) $1,2,4$ (d) $1,3,4$

What statement about nitrogen is consistent with its chemistry?
(1) It makes up $78 \%$ of the earth's atmosphere by volme
(2) It is a colourless, odourless, tasteless gas.
(3) It readily reacts with hydrogen to form $\mathrm{NH}_{3}$ that is used in fertilizers
(4) It is the most volatile component of liquid air with a boiling point of $-196^{\circ} \mathrm{C}$.
(a) $1,2,3$
(b) $2,33,4$
(c) $1,2,4$
(d) $1,3,4$

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Key Concepts

Atmospheric Composition

This concept refers to the fact that Earth's atmosphere is predominantly made up of nitrogen, which constitutes approximately 78% by volume. It underpins our understanding of the environmental and chemical context in which nitrogen exists and is utilized.

Physical Properties of Gases

Nitrogen is known for being colorless, odorless, and tasteless. These properties are characteristic of many diatomic gases and are important for identifying and understanding the behavior of inert gases in various conditions.

Phase Change and Volatility

This concept encompasses the boiling point and volatility aspects of substances, highlighting that nitrogen has a very low boiling point (around -196°C), making it the most volatile component in liquid air. Understanding this is crucial for applications involving cryogenic processing and separation of air components.

Chemical Reactivity and Bond Strength

Nitrogen molecules are characterized by their strong triple bonds, which make them relatively inert under normal conditions. This explains why, despite the feasibility of converting nitrogen to ammonia, such a reaction requires high temperature, pressure, and a catalyst (as in the Haber process) rather than occurring readily.

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