闪卡自测
Give the test and result for hydrogen gas.
所有闪卡
闪卡 1
问题
Give the test and result for hydrogen gas.
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答案
The test and result for hydrogen gas is a lit / burning splint makes a 'squeaky pop' sound.
闪卡 2
问题
Give the formula for hydrogen gas.
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答案
The formula for hydrogen gas is H2.
闪卡 3
问题
True or False? When testing for hydrogen gas, the burning splint is held at the open end of the test tube.
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答案
True. When testing for hydrogen gas, the burning splint is help at the open end of the test tube.
闪卡 4
问题
Give the test and result for oxygen gas.
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答案
The test and result for oxygen gas is a glowing splint relights.
闪卡 5
问题
Give the formula of oxygen gas.
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答案
The formula of oxygen gas is O2.
闪卡 6
问题
Give the formula of carbon dioxide gas.
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答案
The formula of carbon dioxide gas is CO2.
闪卡 7
问题
Give the test and result for carbon dioxide gas.
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答案
The test and result for carbon dioxide gas is limewater turns cloudy / milky.
闪卡 8
问题
What is the chemical name for limewater?
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答案
The chemical name for limewater is calcium hydroxide.
闪卡 9
问题
Why is it hard to distinguish between carbon dioxide, hydrogen and oxygen?
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答案
It is hard to distinguish between carbon dioxide, hydrogen and oxygen because they are all colourless and odourless gases.
闪卡 10
问题
True or False? Chlorine is a colourless, pungent gas.
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答案
False. Chlorine is a green pungent gas
闪卡 11
问题
Give the test and result for chlorine gas.
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答案
The test and result for chlorine gas is that damp litmus paper turns red and then bleaches white.
闪卡 12
问题
Give the formula for chlorine gas.
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答案
The formula of chlorine gas is Cl2.
闪卡 13
问题
Why is chlorine used to treat water?
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答案
Chlorine is used to treat water as it kills bacteria.
闪卡 14
问题
Why does chlorine need to be handled in a fume cupboard?
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答案
Chlorine needs to be handled in a fume cupboard because it is toxic.