试题与答案

下列液体均处于25℃,有关叙述正确的是 A.某物质的溶液pHl,0.1 mol/

题型:选择题

题目:

下列液体均处于25℃,有关叙述正确的是

A.某物质的溶液pH<7,则该物质一定是酸或强酸弱碱盐

B.pH=4.5的番茄汁中c(H)是pH=6.5的牛奶中c(H)的102

C.常温时,某溶液中由水电离出来的c(H)和c(OH)的乘积为1×10-24,该溶液中一定可以大量存在K、Na、AlO2、SO42

D.常温时,0.l mol/L HA溶液的pH>l,0.1 mol/L BOH溶液中c(OH)/c(H)=l012,将这两种溶液等体积混合,混合后溶液中离子浓度的大小关系为:c(B)>c(OH)>c(H)>c(A

答案:

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参考答案:B解析: 本题考核诉讼时效的起算。根据规定,请求他人不作为的债权的请求权,应当自义务人违反不作为义务时起算。注意,这里的不作为是相对于作为而言的,指行为人负有实施某种积极行为的特定的法律义...

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