Question detail
In a displacement reaction between a halogen and a halide salt, which halogen will displace another?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The periodic table
Question
- A. A more reactive halogen
- B. A less reactive halogen
- C. Any halogen will displace another
- D. Only halogens in the same period
Answer
A more reactive halogen
Explanation
In displacement reactions, a more reactive halogen can displace a less reactive halogen from its compound.
Common mistake
Misunderstanding Reactivity Trends
Students often think that reactivity increases down Group 7 instead of decreases.
Remember that as you move down Group 7, the outer electrons are further from the nucleus, making it harder for the atom to attract electrons and thus decreasing reactivity.
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