大学化学(山东联盟) 知到智慧树答案2024 z43439

第一章 单元测试

1、 Mixtures and pure substances can be separated by physical.( )

A:对
B:错
答案:

2、 Celsius is the unit of the temperature.( )

A:对
B:错
答案:

3、 Systematic errors caused by limitations in an experimenter’s skill or ability to read a scientific instrument. ( )

A:对
B:错
答案:

4、 In physical change, some of the physical properties of the sample may change, and its composition changed.( )

A:对
B:错
答案:

5、 There is a temperature at which °C and °F have the same value.( )

A:对
B:错
答案:

第二章 单元测试

1、 Cathode rays are deflected (偏转) in an electric field( )

A:对
B:错
答案:

2、 STP usually refers to the temperature of 0℃ and the pressure of 101.325 kPa( )

A:对
B:错
答案:

3、 Alkali metals are all first period elements( )

A:对
B:错
答案:

4、 There are as many electrons outside the nucleus as there are units of positive charge on the nucleus. The atom as a whole is electrically neutral( )

A:对
B:错
答案:

5、 X-rays are harmless to the human body( )

A:对
B:错
答案:

第三章 单元测试

1、 The oxidation state of the underlined element KO2 is -1/2.( )

A:对
B:错
答案:

2、 The mass percent O in the mineral malachite, Cu2(OH)2CO3 (Cu=64) is 33.04%.( )

A:对
B:错
答案:

3、 The empirical formula of Pentane is CH.( )

A:对
B:错
答案:

4、 C6H10O2 has the same empirical formula as aspidinol, C12H16O4 , a drug used to kill parasitic worms.( )

A:对
B:错
答案:

5、 CH3CH(CH2CH3)CH2OH and CH3CH2CH2CH2CH2OH are isomers.( )

A:对
B:错
答案:

第四章 单元测试

1、 Dry ice is pure.( )

A:对
B:错
答案:

2、 0873 has four significant numbers. ( )

A:对
B:错
答案:

3、 876 has four significant numbers.( )

A:对
B:错
答案:

4、 Ferric oxide is FeO.( )

A:对
B:错
答案:

5、 Mercury is a metallic element.( )

A:对
B:错
答案:

第五章 单元测试

1、 Acetic acid cannot disassociates completely.( )

A:对
B:错
答案:

2、 The reducing agent gains electrons in the reaction. ( )

A:对
B:错
答案:

3、 The oxidizing agent causes another substance to be reduced.( )

A:对
B:错
答案:

4、

Sulfuric acid cannot disassociates completely.( )

A:对
B:错
答案:

5、 1M HCl is more acidic than 0.1M H2SO4.( )

A:对
B:错
答案:

第六章 单元测试

1、 Gases have much lower densities than liquids and solids.( )

A:对
B:错
答案:

2、 There is a certain amount of gas in a container works at its 2m2 bottom with 5N force, the pressure of bottom is 2.5kPa.( )

A:对
B:错
答案:

3、 Charles’ law shows us that V∞T at constant n and P.( )

A:对
B:错
答案:

4、 According to the combustion and exothermic reaction C(s)+O2(g)<=>CO2(g), when lower the temperature of the system while not change other conditions, the speed will increase. ( )

A:对
B:错
答案:

5、 According to the reaction N2+3H2<=>2NH3, when add the pressure of the system while not change other conditions, the balance will move to right.( )

A:对
B:错
答案:


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