题目内容

In some cases, the application of atomic economical reaction in chemical synthesis is not enough for eliminating the formation of wastes. These cases include（）

A. The presence of parallel reaction;
B. Low equilibrium conversion;
C. Low product stereoselectivity;
Difficulty in product separation

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Properties of chemicals related to their environmental distribution or dispersion include（）

A. Volatility or melting point;
B. Persistence or biodegradability;
C. Water solubility;
D. Conversion to biologically inactive substances

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The energy is widely used in chemistry and chemical industry in the following aspects（）

Accelerates the reaction rate with heat;
B. The need to control reactivity through cooling;
C. Pre-heating of the reaction mixture;
D. Separation energy requirement

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Which typical environmental problems in the following are related to chemical industry（）

A. Depletion of ozone layer
B. Photochemical smog and haze
C. Acid rain
D. Global warming

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Several unconventional processing techniques that rely on alternative forms and sources of energy are of importance for process intensification. These alternative forms and sources of energy include（）

A. Sonic energy
B. Microwave
C. Solar energy
D. Photo and other radiation

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In some cases, the application of atomic economical reaction in chemical synthesis is not enough for eliminating the formation of wastes. These cases include（）

A. The presence of parallel reaction; B. Low equilibrium conversion; C. Low product stereoselectivity; Difficulty in product separation

Properties of chemicals related to their environmental distribution or dispersion include（）

The energy is widely used in chemistry and chemical industry in the following aspects（）

Which typical environmental problems in the following are related to chemical industry（）

Several unconventional processing techniques that rely on alternative forms and sources of energy are of importance for process intensification. These alternative forms and sources of energy include（）

A. The presence of parallel reaction;
B. Low equilibrium conversion;
C. Low product stereoselectivity;
Difficulty in product separation