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化學 · 共 135 題 · 點擊選項即時核對答案

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91.

For Questions 45–50, 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 are true and the second correctly explains the first.

B.Both are true but the second does not correctly explain the first.

C.The first is false but the second is true.

D.Both are false.

1st statement	2nd statement
Adding potassium nitrate to soil can increase crop yield.	Potassium nitrate can provide the essential elements for plant growth.

92.

For Questions 45–50, 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 are true and the second correctly explains the first.

B.Both are true but the second does not correctly explain the first.

C.The first is false but the second is true.

D.Both are false.

1st statement	2nd statement
Local tap water produces a scum with soap.	Water containing calcium ions can form an insoluble compound with soap.

93.

For Questions 45–50, 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 are true and the second correctly explains the first.

B.Both are true but the second does not correctly explain the first.

C.The first is false but the second is true.

D.Both are false.

1st statement	2nd statement
Water-type fire extinguisher is suitable for putting out a fire caused by kerosene.	Water can cut off the supply of oxygen for a fire caused by kerosene.

94.

For Questions 45–50, 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 are true and the second correctly explains the first.

B.Both are true but the second does not correctly explain the first.

C.The first is false but the second is true.

D.Both are false.

1st statement	2nd statement
Codeine, which is an ingredient of some cough mixtures, may cause drowsiness.	Codeine is addictive.

95.

For Questions 45–50, 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
Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound.	Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X₂Y.

96.

For Questions 45–50, 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
One mole of water occupies the same volume as one mole of carbon dioxide at room temperature and pressure.	One mole of water contains the same number of atoms as one mole of carbon dioxide.

97.

For Questions 45–50, 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
The use of leaded petrol has been banned in Hong Kong.	Lead compounds in car exhaust can cause damage to human brains.

98.

For Questions 45–50, 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
The ethanol content of beer is less than that of red wine.	Beer is made by fermentation of barley while red wine is made by fermentation of grapes.

99.

For Questions 45–50, 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
Wash bottles used in the chemistry laboratory are commonly made of polyethene.	Polyethene is an addition polymer.

100.

For Questions 45–50, 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
Paracetamol is a common active ingredient in anti-acids.	Paracetamol can neutralize hydrochloric acid in the stomach.