科学 5 酸和碱

以下哪项是中性物质？

Which of the following diagrams is neutral substance?

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以下哪项物质和其化学性质是正确的？

Which of the following substances and chemical properties of substances is correct?

• 酸奶 - 中性

  Yoghurt - Neutral substance

• 青芒果 - 碱性

  Green mango - Alkaline substance

• 糖 - 碱性

  Sugar - Alkaline substance

• 汽水 - 酸性

  Canned drink - Acidic substance

上图显示一些番茄和黄梨。

以下哪项说明是正确的？

Diagram above shows tomatoes and pineapple.

Which of the following statements is correct、

• 淡而无味

  Tasteless

• 带有苦味

  Bitter taste

• 使蓝色石蕊试纸变红

  Turn blue litmus paper red

• 使红色石蕊试纸变蓝

  Turn red litmus paper blue

P- vinegar , orange

Q- rice, salt

R- shower gel, baking powder

上图显示一些根据化学性质分类的物质。

P、Q和R分别代表什么化学性质？

Diagram above shows the classification of substances based on chemical properties.

Which of the following substances are P, Q and R ?

• P - 碱性 Alkaline Q - 酸性 Acidic R - 中性 Neutral

• P - 中性 Neutral Q - 碱性 Alkaline R - 酸性 Acidic

• P - 酸性 Acidic Q - 中性 Neutral R - 碱性 Alkaline

• P - 碱性 Alkaline Q - 中性 Neutral R - l酸性 Acidic

以下哪项不是碱性物质的特征？

Which of the following characteristic is not alkaline substance?

• 带有苦味

  Bitter taste

• 带有甜味

  Sweet taste

• 会改变红色石蕊试纸的颜色

  Turn the red litmus paper

• 不会改变蓝色石蕊试纸的颜色

  Does not turn the blue litmus paper

上图显示丽萍在烹饪是发现醋已经用完了。

他可以用什么来代替醋？

Diagram above shows LIping was cooking but she found that the vinegar has been used up.

What can she use instead of vinegar?

• 罗望子

  Tamarind

• 苦瓜

  Bitter gourd

• 萝卜

  Carrot

• 红豆

  Red bean

以下哪项不是中性物质的特征？

Which of the following characteristic is not neutral substance?

• 味道带甜

  Sweet taste

• 味道带苦

  Bitter taste

• 味道带咸

  Salty taste

• 淡而无味

  Tasteless

糖浆- Syrup 漂白剂 - Bleach

上图显示在糖浆里滴入一些漂白剂。

上述液体混合后会有什么化学性质？

Diagram above shows some bleach dripped into the syrup.

What are the chemical properties of the above liquids after mixing?

• 酸性

  Acidic

• 中性

  Neutral

• 碱性

  Alkaline

• 无法测试

  Cannot be tested

洗碗液- Detergent

上图显示一项实验。

预测上述的实验结果。

Diagram above shows an experiment.

Predict the above experimental results.

• 红色石蕊试纸变成蓝色

  Turn red litmus paper blue

• 蓝色石蕊试纸变成红色

  Turn blue litmus paper red

• 石蕊试纸的颜色保持不变

  No change on red and blue litmus paper

• 红色石蕊试纸变成蓝色，蓝色石蕊试纸变成红色。

  Turn red litmus paper blue and turn blue litmus paper red

上图显示一个实验。

X液体是什么？

Diagram above shows an investigation carried out on liquid X.

What is liquid X?

• 水喉水

  Tap water

• 柠檬汁

  Lime juice

• 盐水

  Salt solution

• 洗发水

  Shampoo