Question 1
下列哪种物质在常温下呈现酸性?
- A肥皂水
- B稀盐酸
- C蒸馏水
- D石灰水
Answer: B. 稀盐酸
稀盐酸中含有 离子,具有酸性。
UEC Junior 2 · 科学 (Science)
初二科学 (Science) · 酸与碱 (Acids and Bases)
酸与碱 (Acids and Bases) is part of the UEC Junior 2 Science syllabus. Practice the MCQs here to sharpen your exam technique — each question comes with a worked explanation.
Free sample questions
Question 1
Answer: B. 稀盐酸
Question 2
Answer: C. $ ext{pH} < 7$
Question 3
Answer: A. 立即用大量清水冲洗
Question 4
Answer: B. 酸能与碱发生中和反应
Question 5
Answer: B. $ ext{OH}^-$
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