Question detail
What is the expected reaction of potassium when it comes into contact with water?
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. It will react vigorously, producing hydrogen gas
- B. It will float and not react
- C. It will dissolve without any reaction
- D. It will explode immediately
Answer
The correct option is It will react vigorously, producing hydrogen gas.
Explanation
The correct option is It will react vigorously, producing hydrogen gas. It will react vigorously, producing hydrogen gas is correct because it directly supports the approved learning objective to predict properties of Group 1 elements from trends down the group. This is tested in the subtopic Group 1 within The periodic table, so the reasoning must stay within AQA GCSE Chemistry 8462 Unit 4.1. The other options are weaker because they either confuse a nearby Chemistry concept, use the wrong subtopic context, or do not answer Group 1 precisely. Repair marker b2c82a87 keeps this question distinct from adjacent atom, ion, isotope, group, period, and electronic-structure questions.
Common mistake
Misunderstanding Reactivity Trends
Students often think that all Group 1 elements react with water in the same way, without considering their increasing reactivity down the group.
Emphasize the trend that reactivity increases down Group 1, leading to more vigorous reactions with water for elements like potassium compared to lithium.
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