要检验某溴乙烷中的溴元素,正确的实验方法是             

要检验某溴乙烷中的溴元素,正确的实验方法是                                      

A.加入氯水振荡,观察水层是否有棕红色出现

B.滴入AgNO3溶液,再加入稀HNO3,观察有无浅黄色沉淀生成

C.加入NaOH溶液共热,然后加入稀HNO3使溶液呈酸性,再滴入AgNO3溶液,观察有无浅黄色沉淀生成

D.加入NaOH溶液共热,冷却后加入AgNO3溶液,观察有无浅黄色沉淀生成

答案

C

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