①氧气 ②石蕊溶液 ③干冰 ④石墨 (1)常用的酸碱指示剂是 , (2

①氧气 ②石蕊溶液 ③干冰 ④石墨

(1)常用的酸碱指示剂是 

(2)可用于制铅笔芯的是  

(3)能用于供给呼吸的是  

(4)可用于人工降雨的是  

答案

考点

酸碱指示剂及其性质;氧气的用途;二氧化碳的用途;碳单质的物理性质及用途.

专题

物质的性质与用途.

分析:

①氧气可以支持燃烧,帮助呼吸,

②石蕊溶液可以作指示剂;

③干冰可以用于人工降雨;

④石墨可用作铅笔芯.

解答:

解:(1)石蕊溶液遇酸碱性溶液会变不同的颜色,可以作指示剂;

(2)石墨质软可用作铅笔芯;

(3)氧气可以支持燃烧,帮助呼吸;

(4)干冰可以用于人工降雨.

故答案为(1)②(2)④(3)①(4)③

点评:

本题难度不大,物质的性质决定物质的用途,掌握常见化学物质的性质和用途是正确解答此类题的关键.

 

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