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[",[{"일일 문제] 이론적 기초 2,

2020-09-14View Original

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选择题:某烃的一种同分异构只能生成1种一氯代物,该烃的分子式是( ) A、C3H8 B、C4H10 C、C5H12 D、C6H14 答案:C 提示:能阐述出解题过程的给予额外奖励,答案回复可见
Reply #22020-09-14
C A、丙烷只有一种结构(CH3CH2CH3),丙烷有2种氢原子,所以一氯代物有2种,故A错误; B、丁烷有正丁烷和异丁烷,正丁烷(CH3CH2CH2CH3)有2种氢原子,所以一氯代物有2种;异丁烷CH3CH(CH3)CH3有2种氢原子,所以一氯代物有2种,故B错误; C、戊烷有正戊烷、异戊烷、新戊烷3种同分异构体,正戊烷CH3CH2CH2CH2CH3有3种氢原子,所以一氯代物有3种; 异戊烷CH3CH(CH3)CH2CH3有4种氢原子,所以一氯代物有4种;新戊烷CH3C(CH3)2CH3有1种氢原子,所以一氯代物有1种,故C正确; D、C6H14有5种同分异构体,CH3(CH2)4CH3有3种氢原子,所以一氯代物有3种;CH3CH(CH3)CH2CH2CH3有5种氢原子,所以一氯代物有5种;CH3CH2CH(CH3)CH2CH3有4种氢原子,所以一氯代物有4种;CH3C(CH3)2 CH2CH3有3种氢原子,所以一氯代物有3种;CH3CH(CH3)CH(CH3)CH3有2种氢原子,所以一氯代物有2种,故D错误;

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