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    【题目】(1)油脂是________和________的总称，天然油脂是________(填“纯净物”或“混合物”)。

    (2)为验证某液态天然油脂是否饱和，可采取的实验操作是________________。

    (3)10 g某天然油脂完全水解需要1.8 g氢氧化钠，1 kg该油脂进行催化加氢，需消耗12 g氢气才能进行完全。则1 mol该油脂中平均含有________mol碳碳双键。

    【答案】(1)油 脂肪 混合物

    (2)取少量液态天然油脂于试管中，向其中滴加1～2滴溴水，若溴水褪色，则证明该油脂是不饱和的，若溴水不褪色，则证明该油脂是饱和的(其他合理答案也可)

    (3)4

    【解析】(1)油脂是油和脂肪的总称，属于混合物。

    (2)不饱和油脂能与溴发生加成反应，使溴水褪色。

    (3)1 mol油脂与3 mol NaOH发生水解，1.8 g氢氧化钠为0.045 mol，说明10 g天然油脂为0.015 mol，则1 000 g油脂为1.5 mol，需要12 g(6 mol)的氢气完全加成，根据1 mol碳碳双键加成需要1 mol H2，则1 mol该油脂含有4 mol的碳碳双键。

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