760246
Descrição
Quiz por Hollieee01, atualizado more than 1 year ago
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Criado por Hollieee01
mais de 10 anos atrás
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Questão 1
Questão
What atoms do covalent bonds occur between?
Responda
-
Non-metal atoms
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Metal atoms
-
Metal and non-metal atoms
Questão 2
Questão
A single covalent bond is formed when two atoms share one pair of electrons
Responda
- True
- False
Questão 3
Questão
How many electrons are shared when a double bond is formed?
Responda
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2 electrons
-
Two pairs
-
1 pair
-
12 electrons
Questão 4
Questão
What is each atom aiming to do when sharing it's electrons?
Responda
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Get a full outer shell
-
Lose all of its neutrons
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Give away all of it's electrons to other elements
-
Share with all it's friends to make the world a happier place
Questão 5
Questão
What are the properties of a simple covalent molecule? (2)
Responda
-
Weak forces between the molecules
-
Strong covalent bonds between atoms
-
Weak covalent bonds between atoms
-
Strong forces between the molecules
Questão 6
Questão
Simple covalent molecules have high melting and boiling points and can conduct electricity
Responda
- True
- False
Questão 7
Questão
What makes the giant molecule different to a simple molecule?
Responda
-
Many of the atoms in a giant molecule are joined together covalently throughout the whole giant molecule structure
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There are more electrons in the atoms of the giant molecules which makes them negatively charged and able to conduct electricity
-
Giant molecules have high boiling and melting points, simple molecules have low ones
-
A simple molecule is made by breaking the atoms apart, a giant molecule is made by connecting atoms together manually
Questão 8
Questão
Graphite is used to make
Responda
-
Cars and airplanes
-
Electrodes and lubricants
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Roofs of houses and flooring
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Soles of shoes and hair clips
Questão 9
Questão
Does graphite have weak forces of attraction between its layers or strong?
Responda
-
Strong?
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Weak?
Questão 10
Questão
What methods can you use to test different compounds?
Responda
-
Melting them using a bunsen burner
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Placing electrodes into a sample of the substance to see if it conducts electricity as a solid, liquid or aqueous solution
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Timing how long it takes the substance to dissolve in water
Questão 11
Questão
What is the definition of immiscible?
Responda
-
When two liquids are mixed together and form distinct separate layers
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When liquids are mixed together and stay mixed together
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When liquids turn to carbon dioxide when placed together
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When liquids turn to a gas when they have been placed in a freezer
Questão 12
Questão
Miscible is when liquids are mixed together and they stay mixed together
Responda
- True
- False
Questão 13
Questão
How would you separate miscible liquids?
Responda
-
By using distillation or fractional distillation
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By shaking them around
-
By using a separating tunnel
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By placing them in a water bath
Questão 14
Questão
Once oxygen has been separated from liquid air by fractional distillation what can we use it for?
Responda
-
Steel-making
-
To help young children breath better
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To help freeze food quickly
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To put back into the air
Questão 15
Questão
What is chromatography used for?
Responda
-
To separate dissolved dyes used in food colourings
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To check foods for additives, contaminants and other substances
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To separate traces of chemicals in fires
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To identify drugs
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To test our blood pressure
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To test for animal faeces
Questão 16
Questão
How do we work out the Rf value of a substance?
Responda
-
Distance moved by soluble substance / Distance moved by solvent
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Distance moved by solvent / Distance moved by soluble substance
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Distance moved by soluble substance x Distance moved by solvent
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Distance moved by soluble substance + Distance moved by solvent
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