题干

将一块银白色的金属钠放在空气中会发生一系列的变化:表面迅速变暗→“出汗”→变成白色固体(粉末),下列有关叙述不正确的是(   )

A:表面迅速变暗是因为钠与空气中的氧气反应生成了氧化钠

B:“出汗”是因为生成的氢氧化钠吸收空气中的水蒸气在表面形成了溶液

C:最后变成碳酸钠粉末

D:该过程的所有化学反应均为氧化还原反应

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答案(点此获取答案解析)

D

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                                                                                     Welcome to my blog

Stephen Williams   Friday, June 21

      Today I went to the beach. It was my first day at the ocean for many years. The sound and smell of the ocean brought back memories of the great family vacations when I was a child. We always went to the beach for a week in the summer. I remembered playing for hours in the sand with my sister and crying when I couldn't have any ice cream. Oh, and I remembered finding a huge jellyfish on the beach, and running away because I was scared! Amazing, really, the things you remember from your childhood...

Comments

    Yeah, I remember going for long walks in the countryside. I guess I was only eight or nine. In the winter, my mom made soup, and I can still remember the wonderful smell! When we got home, I always went straight to sleep...

Carla, Mexico

    What a great story! I remember going to the beach, too – on Christmas Day! My family lived in Australia when I was young. I remember waking up early. After we opened our presents, we always went to the beach and had a barbecue.

Leung, Hong Kong

    The best memory I have is playing my first video game, Super Mario. I remember thinking that it was amazing, It was my tenth birthday and I still remember opening the box.

Daisuke, Japan