试题与答案

维生素C(C6H12O6)主要存在于蔬菜、水果中.它能增强人体对疾病的抵抗能力.

题型:问答题

题目:

维生素C(C6H12O6)主要存在于蔬菜、水果中.它能增强人体对疾病的抵抗能力.

(1)取三片维生素C,压碎后溶于10mL水中,过滤.取少量滤液向其中滴加几滴紫色石蕊试液,试液变红,说明维生素C的水溶液呈______性.

(2)维生素C在酸性环境中比较稳定,在高温时容易被破坏.请你想一想,如何食用黄瓜,才能充分利用黄瓜中丰富的维生素C?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E

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