题目

下列各组气体可用同一发生装置制取的是 A．Cl2和O2                                                                                                      B．H2和O2 C．H2和CO2                                                                                                    D．Cl2和HCl 答案： CD 解析: Cl2、HCl符合固+液气体模式，H2和CO2符合固+液↑，O2为固↑,所以C、D项正确．

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