1. Introduction to Chemistry

About your chemistry-studying life

1、Write a letter to a friend or your parents, telling your chemistry-studying life. 要求：用英文写，200字以上

A topic: Chemistry is everywhere!

1、A topic for speaking. Chemistry is everywhere. -Do you agree with the motto? Why? Why not? 要求：用英文写，字数200字以上

2. The Periodic Table

Sharing your research about one chemical element

1、As we know, there are 118 elements in the periodic table until now. Which is your favorite? Why? Why not? Please use at least 200 English words to share your opinion.

3. Nomenclature of Inorganic Compounds and Chemical Formulas

Nomenclature of inorganic compounds单元测验

1、Which of the following nomenclature is correct for ?
    A、aluminum oxide
    B、oxygen aluminum
    C、oxide aluminum
    D、aluminum oxygen

2、Which of the following formulas is correct for iron(III) oxide?
    A、FeO
    B、
    C、
    D、

3、Which of the following formulas is correct for tin (II) oxide?
    A、SnO
    B、
    C、
    D、

4、Which of the following nomenclature is correct for ?
    A、sodium carbonate
    B、sodium carbon
    C、carbon sodium
    D、sodium carbonic

5、Which of the following formulas is correct for magnesium oxide?
    A、
    B、
    C、
    D、

6、Which of the following nomenclature is correct for HBr?
    A、hydrobromic acid
    B、bromic acid
    C、bromous acid
    D、hydrochloric acid

7、Which of the following nomenclature is correct for ?
    A、sodium nitrate
    B、sodium nitrite
    C、sodium nitric
    D、sodium nitride

8、Which of the following nomenclature is correct for ?
    A、sodium borate
    B、sodium boron
    C、sodium borite
    D、sodium boride

9、Which of the following formulas is correct for ferrous hydroxide?
    A、
    B、
    C、
    D、FeOH

10、Which of the following formulas is correct for hydrofluoric acid?
    A、HF
    B、HCl
    C、HBr
    D、HI

11、Which of the following nomenclature is correct for ?
    A、hydrobromic acid
    B、hydrochloric acid
    C、hydrosulfuric acid
    D、hydrofluoric acid

12、Which of the following nomenclature is correct for ?
    A、iron dichloride
    B、iron (II) chloride
    C、ferrous chloride
    D、ferric chloride

13、Which of the following nomenclature is correct for ?
    A、copper (II) hydroxide
    B、copper (I) hydroxide
    C、cupric hydroxide
    D、cuprous hydroxide

14、There are many kinds of acids. HCl is one of them. The name of it is chloric acid.

15、The chemical formulas of stannic fluoride and tin (II) fluoride are the same.

4. Chemical Reactions

Chemical reactions 单元测验

1、The scalar coefficients of the following chemical equation are _______.
    A、a=1, b=2, c=2, d=2
    B、a=1, b=1, c=2, d=1
    C、a=2, b=3, c=4, d=3
    D、a=2, b=3, c=2, d=3

2、The reaction is classified as ________.
    A、a combination reaction
    B、a decomposition reaction
    C、a single displacement reaction
    D、a double displacement reaction

3、The reaction is classified as ______.
    A、a combination reaction
    B、a decomposition reaction
    C、a single displacement reaction
    D、a double displacement reaction

4、Which of the following reactions can be classified as partner exchange reactions?
    A、
    B、
    C、
    D、

5、The reaction is classified as _______.
    A、a combination reaction
    B、a decomposition reaction
    C、a single displacement reaction
    D、1 double displacement reaction

6、Which of the following reactions can be classified as single displacement reactions?
    A、
    B、
    C、
    D、
    E、

7、Which of the following chemical reactions would you expect to occur as written?
    A、
    B、
    C、
    D、
    E、

8、Which of the following chemical reactions would you expect to occur as written?
    A、
    B、
    C、
    D、

9、The proportions of the reactants should be respected, when they are forced to react, all of the substance used will participate in the reaction, and the reaction that will take place will be the same as the one noted in the equation.

5. Chemical Calculations

Chemical calculations 单元测验

1、 decomposes to form and . If the mass of decomposed is 435 g, then ( ) g will be produced. (答案只保留整数）

2、If 10 g potassium reacts with 10 g iodine to form potassium iodide, then the limiting reactant is ( ).

6. Nomenclature of Organic Compounds

Nomenclature of straight chain hydrocarbons 单元测验

1、The name of is ______.
    A、butane
    B、propane
    C、butene
    D、butyne

2、The name of is ______.
    A、2-butene
    B、2-butane
    C、2-butyne
    D、3-butene

3、The structure of 2-pentyne is _______.
    A、
    B、
    C、
    D、

4、The name of is _______.
    A、cyclopentane
    B、cyclobutane
    C、cyclopropane
    D、cyclohexane

5、The name of is ______.
    A、methyl
    B、ethyl
    C、propyl
    D、isopropyl

6、The name of is _______.
    A、ethyl
    B、n-propyl
    C、n-butyl
    D、methyl

7、The name of is _______.
    A、sec-butyl
    B、isobutyl
    C、n-butyl
    D、tert-butyl

8、The name of is _______.
    A、isopropyl
    B、n-propyl
    C、isobutyl
    D、sec-butyl

Nomenclature of branched alkanes 单元测验 (20商英三）

1、The name of is _______.
    A、4-methylnonane
    B、5-methylnonane
    C、4-ethylnonane
    D、4-methyloctane

2、The structure of 2,2-dimethylpentane is _______.
    A、
    B、
    C、
    D、

3、The name of is ______.
    A、2,4-dimethylhexane
    B、2,4-diethylhexane
    C、3,5-dimethylhexane
    D、2,4-dimethylpentane

4、The name of is ______.
    A、5-ethyl-2-methyloctane
    B、2-methyl-5-ethyloctane
    C、5-ethyl-2-methylnonane
    D、2-ethyl-5-methylnonane

5、The structure of 2-methylbutane is ______.
    A、
    B、
    C、
    D、