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An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substance X and Y are
- a)X = Fe, Y = Fe2O3
- b)X = Ag, Y = Ag2S
- c)X = Cu, Y = CuO
- d)X = Al, Y = Al2O3
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
An element X on exposure to moist air turns reddish-brown and a new co...
The substance X is Fe----ferric oxide
The substance Y is Fe2O3.xH2O( rust )
Hope it helps you
Most Upvoted Answer
An element X on exposure to moist air turns reddish-brown and a new co...
Explanation:
- Element X turning reddish-brown on exposure to moist air: This characteristic is a property of iron (Fe), which oxidizes in the presence of moisture in the air to form a reddish-brown compound.
- Formation of compound Y: The new compound formed, Y, is iron(III) oxide (Fe2O3), which is commonly known as rust. When iron reacts with oxygen and moisture, it forms this compound.
- Identification of X and Y: Therefore, in this reaction, X represents iron (Fe), and Y represents iron(III) oxide (Fe2O3).
- Reactive nature of iron: Iron is known for its reactivity with oxygen and moisture, leading to the formation of iron oxide. This process is commonly observed in the rusting of iron objects when exposed to air and moisture.
- Color change: The change in color from the metallic grey of iron to the reddish-brown of iron oxide is a visible indicator of the oxidation process taking place.
- Chemical equation: The reaction can be represented by the equation:
4Fe(s) + 3O2(g) → 2Fe2O3(s)
- Importance: Understanding the oxidation of iron is crucial in preventing corrosion and rusting of iron-based materials, leading to the development of protective coatings and measures to inhibit this process.
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