皮皮学，免费搜题
登录
搜题
【简答题】
苯甲醛在浓碱的作用下，发生Cannizzaro反应，生成苯甲酸和苯甲醇。具体实验操作如下：锥形瓶中放入一定量的40%的氢氧化钠水溶液，分批加入新蒸馏过的苯甲醛，振荡使反应物成白色蜡状物，放置过夜，得苯甲酸钠和苯甲醇混合物（粘稠状）。相关物理常数如下表，请按要求回答下列问题： 如何鉴定所得两种产物的纯度？
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】. .Modern China is experiencing a completely new period ______ respect for science and creativity has become the guiding principle of the society.
A.
which
B.
where
C.
that
D.
in which
【简答题】按照不同的划分标准,供应链可以分为不同的类型,通常根据供应链的研究对象及其范围,可以把供应链分为 A .上游供应链和下游供应链 B.企业供应链和商业供应链 C.企业内部供应链和广义供应链 D.商业供应链和企业供应链
【单选题】在信用证方式下，银行保证向信用证受益人履行付款责任的条件是：
A.
受益人按期履行合同
B.
受益人按信用证规定交货
C.
受益人提交符合信用证要求的单据
D.
开证申请人付款赎单
【简答题】Our modern civilization must not be thought of as ________ in a short period of time. [A] being created [B] to have been created [C] having been created [D] to be created
【单选题】Charles Dickens is one of the greatest critical realist writer of
A.
the Modern Period.
B.
the English Renaissance.
C.
the Romantic Period.
D.
the Victorian Age.
【单选题】Dickens is one of the greatest critical realist writer of ______.
A.
the Modern Period.
B.
the English Renaissance.
C.
the Romantic Period.
D.
the Victorian Age.
【单选题】按照不同的划分标准,供应链可以分为不同的类型,通常根据供应链的研究对象及其范围,可以把供应链分为 ( )
A.
上游供应链和下游供应链
B.
企业供应链和商业供应链
C.
企业内部供应链和广义供应链
D.
商业供应链和企业供应链
【单选题】Modern China is experiencing a completely new period ________ respect for science and creativity has become the guiding principle of society. [ ]
A.
of which
B.
where
C.
in which
D.
that
相关题目：