According to the passage the classification o
问题详情
According to the passage, the classification of characteristic properties as "physical" or "chemical" is determined by
A．whether there has been a change in the structure of the substance
B．what happens when the quantity of the substance is increased
C．their classification as either extensive or intensive samples
D．the disappearance of a substance from one form. to another请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析："Has the fundamental composition of the substance changed? In a chemical change...it has, but in a physical change, it has not." Choice B is not correct because the quantity refers to extensive properties, not to the difference between physical or chemical properties. Choice C is not correct because both physical and chemical properties are intensive properties. Choice D is not correct because the apparent disappearance of a substance is not necessarily a sign that we are observing a chemical change.
