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WorksheetsAcid Alkaline indicator and pH scale
Total questions: 12
Worksheet time: 10mins
Which of the following plant extracts CANNOT be used as a natural indicator?
以下哪一項植物提取液不可以用作天然指示劑？
Strawberry Extract 草莓提取液
Onion Extract 洋葱提取液
Red Cabbage Extract 紅椰菜提取液
Blueberry Extract藍莓提取液
Which of the following substances does NOT contain alkalis?
以下哪一項不是鹼性溶液？
Baking Soda 梳打粉
Glass Cleaner 玻璃清潔劑
Hair conditioner 護髮素
Toothpaste 牙膏
Which of the following statements about red cabbage extract are correct?
以下哪些有關紅椰菜提取液的描述是正確的？
(1) It contains pigments which change colour in the presence of an acid or an alkali.
紅椰菜提取液中的色素會隨著酸鹼改變顔色。
(2) It is pink in dilute hydrochloric acid.
紅椰菜提取液在稀氫氯酸中是粉紅色的。
(3) It is purple in dilute sodium hydroxide acid.
紅椰菜提取液在稀氯化鈉中是紫色的。
(4) It is Yellow in concentrated calcium hydroxide
紅椰菜提取液在濃氫氧化鈣溶液中是紫色的。
Blue litmus paper
藍色石蕊指示劑
is always blue
永遠是藍色的
will turn red when added into an acid.
當遇到酸性溶液會轉爲紅色
is a concentrated acid.
是强酸
is an animal extract.
是動物提取液
Which of the following substances can turn blue litmus paper red?
Apple juice
Glass cleaner
Black coffee
Distilled water
Which of the following is NOT neutral?
以下哪一項并不是中性溶液？
salt water鹽水
sugar water糖水
Distilled water蒸餾水
Soap water肥皂水
Which of the following can indicate whether a substance is an acid or an alkali?
以下哪些指示劑能準確顯示物質的酸鹼值？
Litmus paper
石蕊試紙
Universal Indicator
通用指示劑溶液
pH paper
pH 試紙
Blueberry extract
藍莓提取液
Which of the following can be used to distinguish between sodium hydroxide and limewater?
以下哪些指示劑可以用於分辨氫氧化鈉溶液和石灰水？
pH paper
pH試紙
Red litmus paper
紅石蕊試紙
Universal indicator
通用指示劑溶液
Blue litmus paper
藍石蕊試紙
Which of the following colours shown by a pH paper indicates the lowest pH?
以下哪種顔色在pH試紙中顯示最低酸鹼值。
Green 綠色
Orange 橙色
Red 紅色
Yellow 黃色
Which of the following represents the pH range of acids?
以下哪個酸鹼值的範圍代表酸性？
0 to 6
0 to 7
0 to 14
8 to 14
Which of the following substance has/have a pH value lower than 7?
以下哪些物質的酸鹼值低於7？
Rain water雨水
Lemon water 檸檬水
Toothpaste 牙膏
Bleach 漂白水
Which of the following indicators can show the alkalinity or acidity of a substance?
以下哪些指示劑能顯示物質的酸度或鹼度？
pH paper
pH 試紙
Litmus paper
石蕊試紙
pH meter
pH計
Universal indicator
通用指示劑溶液
