2592759
Descrição
Quiz por Gabi Germain, atualizado more than 1 year ago
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Criado por Gabi Germain
aproximadamente 9 anos atrás
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Questão 1
Questão
How did mandeleev overcome the problem of undiscovered elements?
Responda
-
Put them in a seperate groups
-
Leaving spaces
-
Ignoring them
Questão 2
Questão
How were the early periodic tables arranged?
Responda
-
By proton number
-
By Atomic weight
Questão 3
Questão
How is the modern periodic table ordered?
Responda
-
Atomic weight
-
Proton number
Questão 4
Questão
Elements in the same group have the same number of...
Responda
-
Electrons in their outer shell
-
shells or energy levels
-
Protons in the nucleus
Questão 5
Questão
Characteristics of group 1:
Responda
-
Low density
-
High density
-
React with non metals to form ionic compounds and carry a +1 charge
-
React with non metals to form covalent compounds and carry a +1 charge
-
React with water to release hydrogen
-
form hydroxides that dissolves in water to give alkaline solutions
Questão 6
Questão
The further up the group 1 the more reactive and lower its melting poit
Responda
- True
- False
Questão 7
Questão
Characteristics of transition elements compared with group1:
Responda
-
higher melting points
-
lower melting points
-
stronger and harder
-
Much less reactive
-
Much more reactive
Questão 8
Questão
Transition metals are useful catalysts
Responda
- True
- False
Questão 9
Questão
What are group 7 elements known as?
Responda
-
Alkalis
-
Acids
-
Gases
-
Halogens
Questão 10
Questão
The further down group 7 the less reactive and the higher melting point.
Responda
- True
- False
Questão 11
Questão
A more reactive halogen can displace a less reactive halogen from an..
Responda
-
Aqueous solution of its salt
-
Aqueous solution of its oxide
Questão 12
Questão
The more energy levels an element has the less reactive it is
Responda
- True
- False
Questão 13
Questão
Hard water can contain..
Responda
-
Magnesium ions
-
Calcium ions
-
Hydrogencarbonate ions (in temporary)
-
barium
-
Berillium
Questão 14
Questão
Which type of water form a lather readily?
Responda
-
Soft water
-
Hard water
Questão 15
Questão
There are two types of hard water temporary hard water and permanent hard water
Responda
- True
- False
Questão 16
Questão
Scum is formed by the decomposition of Hydrogencarbonate ions in temporary hard water
Responda
- True
- False
Questão 17
Questão
What are two ways that hardness can be removed?
Responda
-
Exchange columns and adding sodium carbonate
-
Heating it and adding calcium carbonate
Questão 18
Questão
What are two things that water should have low levels of?
Responda
-
Water
-
Calcium
-
Microbes
-
Dissolved salts
Questão 19
Questão
Pure water can be produced by distillation
Responda
- True
- False
Questão 20
Questão
What do water filters contain to remove some dissolved substances from water?
Responda
-
Silver, carbon and ion exchange resin
-
Gold, carbon and ion exchange resin
Questão 21
Questão
Chlorine is added to water to increase microbes and flourine isn't added to improve dental health
Responda
- True
- False
Questão 22
Questão
How is energy released from substances measured?
Responda
-
Calorimetry
-
Titration
-
Electrolysis
Questão 23
Questão
Why in a chemical reaction should the reagents be mixed in an insulated container?
Responda
-
So less energy escapes to the surroundings
-
So it wont burn the person
-
so none of the substance leaks out
Questão 24
Questão
During a reaction energy is needed to make bonds and energy is released when breaking bonds
Responda
- True
- False
Questão 25
Questão
Three things to do when drawing an energy diagram:
Responda
-
Show reactants then products
-
Show activation energy
-
Overall energy change
-
Use a red pencil
-
Draw a best fit line
-
Show products then reactants
Questão 26
Questão
In an exothermic reaction more energy is released to make bonds than break them
Responda
- True
- False
Questão 27
Questão
Catalysts higher the activation energy
Responda
- True
- False
Questão 28
Questão
Tick the 4 true facts:
Responda
-
Lithium has a crimson flame
-
Lithium has a lilac flame
-
Potassium has a lilac flame
-
Barium has a blue flame
-
Barium has a green flame
-
sodium has a yellow flame
-
sodium has an orange flame
Questão 29
Questão
Aluminium, calcium and magnesium ions form white precipitates
Responda
- True
- False
Questão 30
Questão
What colour precipitate does copper form?
Responda
-
Blue
-
Green
-
Brown
Questão 31
Questão
What colour precipitate does iron (lll) ions form?
Responda
-
Green
-
Brown
-
Blue
Questão 32
Questão
What colour precipitate does iron(ll) ions give?
Responda
-
Green
-
Blue
-
Brown
Questão 33
Questão
Carbonates react with dilute acid to form carbon dioxide
Responda
- True
- False
Questão 34
Questão
Halide ions can be tested by adding what and what then looking at the precipitates?
Responda
-
Silver nitrate solution and dilute nitric acid
-
Silver nitrate solution and hydrochloric acid
-
silver nitrate solution and barium oxide
Questão 35
Questão
To test sulphate ions add hydrochloric acid and barium chloride solution
Responda
- True
- False
Questão 36
Questão
How can volumes of acid and alkali solutions that react with each other be measured?
Responda
-
Titration
-
Calorimetry
-
Electrolysis scales
Questão 37
Questão
What are the raw materials in the haber process?
Responda
-
Nitrogen
-
Hydrogen
-
Iron
-
Ammonia
Questão 38
Questão
What is the temperature and pressure in the haber process?
Responda
-
200 atmospheres and 450 degrees
-
450 atmospheres and 200 degrees
Questão 39
Questão
Ammonia is produced in the haber process
Responda
- True
- False
Questão 40
Questão
Equilibrium is reached when the reactions occur at the same rate in each direction
Responda
- True
- False
Questão 41
Questão
To increase the yield in a reaction that is exothermic in the forward direction what do you do?
Responda
-
Increase the temperature
-
Decrease the temperature
Questão 42
Questão
What can you do to increase the yield when the forward reaction has more gaseous molecules?
Responda
-
Increase the temperature
-
Decrease the temperature
Questão 43
Questão
We have to compromise temperature, pressure and rate of reaction in the haber process
Responda
- True
- False
Questão 44
Questão
Which functional group is for alcohols?
Responda
-
-OH
-
-COO-
-
-COOH
Questão 45
Questão
Which functional group is for esters?
Responda
-
-COO-
-
-OH
-
-COOH
Questão 46
Questão
What is the functional group for acids?
Responda
-
-COOH
-
-COO-
-
-OH
Questão 47
Questão
3 characteristics of alcohols:
Responda
-
burn in air
-
don't burn in air
-
React with sodium to produce hydrogen
-
React with sodium to produce carbon dioxide
-
dissolve in water to form a neutral solution
Questão 48
Questão
Oxidising ethanol makes ethanoic acid
Responda
- True
- False
Questão 49
Questão
4 characteristics of carboxylic acids:
Responda
-
dissolve in water to produce acidic solutions
-
dissolve in water to produce alkali solutions
-
dont ionise completely when dissolved in water so are weak acids
-
ionise completely with water
-
react with alcohols in the presence of an acid to produce esters
-
react with carbonates to produce carbon dioxide
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