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Name :An alkaline gas .X. which gives de...

Name :An alkaline gas .X. which gives dense oxide fumes with HCl.

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**Step-by-Step Solution:** 1. **Identify the Characteristics of the Gas**: The question asks for an alkaline gas that reacts with hydrochloric acid (HCl) to produce dense oxide fumes. Alkaline gases are typically basic in nature. 2. **Consider Common Alkaline Gases**: The most common alkaline gas is ammonia (NH₃). It is known for its basic properties and is often encountered in chemical reactions. 3. **Reaction with Hydrochloric Acid**: When ammonia gas (NH₃) reacts with hydrochloric acid (HCl), the reaction produces ammonium chloride (NH₄Cl). This reaction can be represented as: \[ ...
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