2000 年
化學 · 共 34 題 · 點擊選項即時核對答案
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31.
Which of the following statements concerning sulphur dioxide are correct ?
(1)It can be prepared by heating copper turnings with concentrated sulphuric acid.
(2)It is denser than air.
(3)It can be absorbed by sodium hydroxide solution.
32.
For each of the following questions, decide whether each of the two statements is true or false. If both are true, decide whether the second correctly explains the first.
A.Both statements are true and the 2nd statement is a correct explanation of the 1st statement.
B.Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.
C.The 1st statement is false but the 2nd statement is true.
D.Both statements are false.
| 1st statement | 2nd statement |
|---|---|
| Concentrated sulphuric acid can turn a piece of filter paper black. | Concentrated sulphuric acid is a strong oxidizing agent. |
33.
For each of the following questions, decide whether each of the two statements is true or false. If both are true, decide whether the second correctly explains the first.
A.Both statements are true and the 2nd statement is a correct explanation of the 1st statement.
B.Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.
C.The 1st statement is false but the 2nd statement is true.
D.Both statements are false.
| 1st statement | 2nd statement |
|---|---|
| Carbon dioxide and silicon dioxide have similar physical properties. | The atoms of carbon and silicon have the same number of electrons in their outermost shells. |
34.
For each of the following questions, decide whether each of the two statements is true or false. If both are true, decide whether the second correctly explains the first.
A.Both statements are true and the 2nd statement is a correct explanation of the 1st statement.
B.Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.
C.The 1st statement is false but the 2nd statement is true.
D.Both statements are false.
| 1st statement | 2nd statement |
|---|---|
| Aluminium was used earlier than iron in the history of mankind. | Aluminium is more abundant than iron in the earth crust. |