其他

化學 · 共 135 題 · 點擊選項即時核對答案

只看錯題本頁已答 0 / 10

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
Solid citric acid reacts with magnesium to give hydrogen.	Citric acid contains ionisable hydrogen atoms.

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
Potassium is a stronger reducing agent than sodium.	Potassium atoms lose electrons more readily than sodium atoms.

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
In Hong Kong, taxis have switched from using diesel to using natural gas as fuel.	Burning natural gas poses less harm to the environment than burning diesel.

44.

Consider the conversions between three nitrogen compounds shown in the flow diagram below:

Which of the following statements is correct ?

45.

There are two unlabeled bottles in the laboratory. One of the bottles contains an aqueous solution of common salt and the other contains antiseptic alcohol. Which of the following methods can be used to distinguish the substances in the bottles?

(1)adding a small amount of water

(2)detecting their odour

(3)measuring their electrical conductivity

46.

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.

47.

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.

48.

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).

49.

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
Citric acid is an electrolyte.	When citric acid is dissolved in water, citric acid molecules becomes mobile.

50.

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
Iodine can displace chlorine from potassium chloride solution.	Iodine is a stronger oxidizing agent than chlorine.