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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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Most Upvoted Answer
An element X on exposure to moist air turns reddish-brown and a new co...
An element X exposure to moist air, forms a reddish brown and a new compound Y is formed.
Fe + H2O +O2 → Fe2 O3
This Fe2O3 is the reddish brown compound which is called rust.
So , X → Fe
Y → Fe2O3
Fe + H2O +O2 → Fe2 O3
This Fe2O3 is the reddish brown compound which is called rust.
So , X → Fe
Y → Fe2O3
So Option A is correct
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An element X on exposure to moist air turns reddish-brown and a new co...
Explanation:
Observation: Element X on exposure to moist air turns reddish-brown and a new compound Y is formed.
From the given options, we need to find out the element X and compound Y.
Let's analyze each option one by one.
Option a) X = Fe, Y = Fe2O3: When iron (Fe) comes in contact with moist air, it gets oxidized and forms a reddish-brown compound called iron(III) oxide or ferric oxide (Fe2O3). This reaction is commonly known as rusting.
Option b) X = Ag, Y = Ag2S: When silver (Ag) comes in contact with moist air, it does not react to form any reddish-brown compound. Instead, it forms a blackish compound called silver sulfide (Ag2S).
Option c) X = Cu, Y = CuO: When copper (Cu) comes in contact with moist air, it gets oxidized and forms a bluish-green compound called copper(II) oxide (CuO). It does not form any reddish-brown compound.
Option d) X = Al, Y = Al2O3: When aluminum (Al) comes in contact with moist air, it forms a thin layer of aluminum oxide (Al2O3) on its surface. However, this layer is not reddish-brown in color.
Conclusion: After analyzing all the options, we can conclude that the correct answer is option 'a' where element X is iron (Fe) and compound Y is iron(III) oxide or ferric oxide (Fe2O3) which is formed by rusting.
Observation: Element X on exposure to moist air turns reddish-brown and a new compound Y is formed.
From the given options, we need to find out the element X and compound Y.
Let's analyze each option one by one.
Option a) X = Fe, Y = Fe2O3: When iron (Fe) comes in contact with moist air, it gets oxidized and forms a reddish-brown compound called iron(III) oxide or ferric oxide (Fe2O3). This reaction is commonly known as rusting.
Option b) X = Ag, Y = Ag2S: When silver (Ag) comes in contact with moist air, it does not react to form any reddish-brown compound. Instead, it forms a blackish compound called silver sulfide (Ag2S).
Option c) X = Cu, Y = CuO: When copper (Cu) comes in contact with moist air, it gets oxidized and forms a bluish-green compound called copper(II) oxide (CuO). It does not form any reddish-brown compound.
Option d) X = Al, Y = Al2O3: When aluminum (Al) comes in contact with moist air, it forms a thin layer of aluminum oxide (Al2O3) on its surface. However, this layer is not reddish-brown in color.
Conclusion: After analyzing all the options, we can conclude that the correct answer is option 'a' where element X is iron (Fe) and compound Y is iron(III) oxide or ferric oxide (Fe2O3) which is formed by rusting.
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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 area)X = Fe, Y = Fe2O3b)X = Ag, Y = Ag2Sc)X = Cu, Y = CuOd)X = Al, Y = Al2O3Correct answer is option 'A'. Can you explain this answer?
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