2006 年

化學 · 共 43 題 · 點擊選項即時核對答案

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41.

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 can effectively be prepared by the action of dilute sulphuric acid on calcium carbonate.	Carbonate reacts with dilute acids to give carbon dioxide.

42.

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
Both ethene and polyethene can decolourize a solution of bromine in an organic solvent.	Both ethene and polyethene belong to the same homologous series.

43.

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
Under room temperature and pressure, 1 mol of O₂(g) occupies a smaller volume than 1 mol of O₃(g).	The number of atoms in 1 mol of O₂(g) is less than that in 1 mol of O₃(g).