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Quiz von Gabi Germain, aktualisiert more than 1 year ago
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Erstellt von Gabi Germain
vor etwa 9 Jahre
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Frage 1
Frage
How did mandeleev overcome the problem of undiscovered elements?
Antworten
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Put them in a seperate groups
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Leaving spaces
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Ignoring them
Frage 2
Frage
How were the early periodic tables arranged?
Antworten
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By proton number
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By Atomic weight
Frage 3
Frage
How is the modern periodic table ordered?
Antworten
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Atomic weight
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Proton number
Frage 4
Frage
Elements in the same group have the same number of...
Antworten
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Electrons in their outer shell
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shells or energy levels
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Protons in the nucleus
Frage 5
Frage
Characteristics of group 1:
Antworten
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Low density
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High density
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React with non metals to form ionic compounds and carry a +1 charge
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React with non metals to form covalent compounds and carry a +1 charge
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React with water to release hydrogen
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form hydroxides that dissolves in water to give alkaline solutions
Frage 6
Frage
The further up the group 1 the more reactive and lower its melting poit
Antworten
- True
- False
Frage 7
Frage
Characteristics of transition elements compared with group1:
Antworten
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higher melting points
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lower melting points
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stronger and harder
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Much less reactive
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Much more reactive
Frage 8
Frage
Transition metals are useful catalysts
Antworten
- True
- False
Frage 9
Frage
What are group 7 elements known as?
Antworten
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Alkalis
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Acids
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Gases
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Halogens
Frage 10
Frage
The further down group 7 the less reactive and the higher melting point.
Antworten
- True
- False
Frage 11
Frage
A more reactive halogen can displace a less reactive halogen from an..
Antworten
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Aqueous solution of its salt
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Aqueous solution of its oxide
Frage 12
Frage
The more energy levels an element has the less reactive it is
Antworten
- True
- False
Frage 13
Frage
Hard water can contain..
Antworten
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Magnesium ions
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Calcium ions
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Hydrogencarbonate ions (in temporary)
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barium
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Berillium
Frage 14
Frage
Which type of water form a lather readily?
Antworten
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Soft water
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Hard water
Frage 15
Frage
There are two types of hard water temporary hard water and permanent hard water
Antworten
- True
- False
Frage 16
Frage
Scum is formed by the decomposition of Hydrogencarbonate ions in temporary hard water
Antworten
- True
- False
Frage 17
Frage
What are two ways that hardness can be removed?
Antworten
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Exchange columns and adding sodium carbonate
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Heating it and adding calcium carbonate
Frage 18
Frage
What are two things that water should have low levels of?
Antworten
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Water
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Calcium
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Microbes
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Dissolved salts
Frage 19
Frage
Pure water can be produced by distillation
Antworten
- True
- False
Frage 20
Frage
What do water filters contain to remove some dissolved substances from water?
Antworten
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Silver, carbon and ion exchange resin
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Gold, carbon and ion exchange resin
Frage 21
Frage
Chlorine is added to water to increase microbes and flourine isn't added to improve dental health
Antworten
- True
- False
Frage 22
Frage
How is energy released from substances measured?
Antworten
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Calorimetry
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Titration
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Electrolysis
Frage 23
Frage
Why in a chemical reaction should the reagents be mixed in an insulated container?
Antworten
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So less energy escapes to the surroundings
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So it wont burn the person
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so none of the substance leaks out
Frage 24
Frage
During a reaction energy is needed to make bonds and energy is released when breaking bonds
Antworten
- True
- False
Frage 25
Frage
Three things to do when drawing an energy diagram:
Antworten
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Show reactants then products
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Show activation energy
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Overall energy change
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Use a red pencil
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Draw a best fit line
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Show products then reactants
Frage 26
Frage
In an exothermic reaction more energy is released to make bonds than break them
Antworten
- True
- False
Frage 27
Frage
Catalysts higher the activation energy
Antworten
- True
- False
Frage 28
Frage
Tick the 4 true facts:
Antworten
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Lithium has a crimson flame
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Lithium has a lilac flame
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Potassium has a lilac flame
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Barium has a blue flame
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Barium has a green flame
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sodium has a yellow flame
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sodium has an orange flame
Frage 29
Frage
Aluminium, calcium and magnesium ions form white precipitates
Antworten
- True
- False
Frage 30
Frage
What colour precipitate does copper form?
Antworten
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Blue
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Green
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Brown
Frage 31
Frage
What colour precipitate does iron (lll) ions form?
Antworten
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Green
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Brown
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Blue
Frage 32
Frage
What colour precipitate does iron(ll) ions give?
Antworten
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Green
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Blue
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Brown
Frage 33
Frage
Carbonates react with dilute acid to form carbon dioxide
Antworten
- True
- False
Frage 34
Frage
Halide ions can be tested by adding what and what then looking at the precipitates?
Antworten
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Silver nitrate solution and dilute nitric acid
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Silver nitrate solution and hydrochloric acid
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silver nitrate solution and barium oxide
Frage 35
Frage
To test sulphate ions add hydrochloric acid and barium chloride solution
Antworten
- True
- False
Frage 36
Frage
How can volumes of acid and alkali solutions that react with each other be measured?
Antworten
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Titration
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Calorimetry
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Electrolysis scales
Frage 37
Frage
What are the raw materials in the haber process?
Antworten
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Nitrogen
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Hydrogen
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Iron
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Ammonia
Frage 38
Frage
What is the temperature and pressure in the haber process?
Antworten
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200 atmospheres and 450 degrees
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450 atmospheres and 200 degrees
Frage 39
Frage
Ammonia is produced in the haber process
Antworten
- True
- False
Frage 40
Frage
Equilibrium is reached when the reactions occur at the same rate in each direction
Antworten
- True
- False
Frage 41
Frage
To increase the yield in a reaction that is exothermic in the forward direction what do you do?
Antworten
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Increase the temperature
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Decrease the temperature
Frage 42
Frage
What can you do to increase the yield when the forward reaction has more gaseous molecules?
Antworten
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Increase the temperature
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Decrease the temperature
Frage 43
Frage
We have to compromise temperature, pressure and rate of reaction in the haber process
Antworten
- True
- False
Frage 44
Frage
Which functional group is for alcohols?
Antworten
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-OH
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-COO-
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-COOH
Frage 45
Frage
Which functional group is for esters?
Antworten
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-COO-
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-OH
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-COOH
Frage 46
Frage
What is the functional group for acids?
Antworten
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-COOH
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-COO-
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-OH
Frage 47
Frage
3 characteristics of alcohols:
Antworten
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burn in air
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don't burn in air
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React with sodium to produce hydrogen
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React with sodium to produce carbon dioxide
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dissolve in water to form a neutral solution
Frage 48
Frage
Oxidising ethanol makes ethanoic acid
Antworten
- True
- False
Frage 49
Frage
4 characteristics of carboxylic acids:
Antworten
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dissolve in water to produce acidic solutions
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dissolve in water to produce alkali solutions
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dont ionise completely when dissolved in water so are weak acids
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ionise completely with water
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react with alcohols in the presence of an acid to produce esters
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react with carbonates to produce carbon dioxide
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