Metal A displaces metal B and metal B displaces metal C from their salt solutions. Which is least reactive?
Answer and explanation
Correct answer: Metal C
A displacement reaction follows the reactivity series: a more reactive metal can remove a less reactive metal from its salt solution. Since A displaces B, A is more reactive than B. Since B displaces C, B is more reactive than C. The order is therefore A > B > C, making C the least reactive metal. Hence option C is correct; option D ignores the evidence from both displacement reactions.
Frequently asked questions
What is the correct answer to this question?
Metal C
Why is this the correct answer?
A displacement reaction follows the reactivity series: a more reactive metal can remove a less reactive metal from its salt solution. Since A displaces B, A is more reactive than B. Since B displaces C, B is more reactive than C. The order is therefore A > B > C, making C the least reactive metal. Hence option C is correct; option D ignores the evidence from both displacement reactions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Metals and Non-metals. Topic: Reactivity series.
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