下列有关化学反应速率的说法中,正确的是(   )           

下列有关化学反应速率的说法中,正确的是(              

A.铁片与稀盐酸制取氢气时,加入NaNO3固体或Na2SO4固体都不影响生成氢气的速率

B.等质量的锌片分别与同体积、同物质的量浓度的盐酸、硫酸反应,反应速率不相等

CSO2的催化氧化是一个放热反应,所以升高温度,反应速率减慢

D.加入反应物,单位体积内活化分子百分数增大,化学反应速率增大

答案

B

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