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单选题
下列各组有机物,无论以何种物质的量的比例混合,只要总物质的量一定,则完全燃烧消耗氧气的量为一恒定值的是(  ).
A

C3H6和C3H8

B

C2H6和C2H4O2

C

C5H10和C6H6

D

C2H6和C3H8


参考答案

参考解析
解析:
由于该混合有机物无论以何种物质的量的比例混合,只要总物质的量一定,则完全燃烧消耗氧气的量为恒定值,所以混合物中两种有机物在相同物质的量下耗氧量相同,ABD三项,耗氧量不同.
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