4035692
Descripción
Test por Lilac Potato, actualizado hace más de 1 año
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Creado por Lilac Potato
hace más de 8 años
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Pregunta 1
Pregunta
Until recently, the elements were arranged in order of their [blank_start]atomic mass[blank_end].
Respuesta
-
atomic mass
-
atomic number
-
names (alphabetically)
Pregunta 2
Pregunta
What were the problems with Newlands' Law of Octaves?
Respuesta
-
The groups contains elements that didn't have similar properties e.g. C and Ti
-
He mixed up metals and non-metals e.g. O and Fe
-
He didn't leave any gaps for undiscovered elements
-
They weren't arranged in order of atomic mass
-
They went against the Church
Pregunta 3
Pregunta
Group 1 metals become [blank_start]more[blank_end] reactive as you go down the group because the outer electron is more easily lost as it's further from the nucleus.
Respuesta
-
more
-
less
Pregunta 4
Respuesta
-
Fluorine
-
Chlorine
-
Bromine
-
Iodine
Pregunta 5
Pregunta
Transition metals are less reactive, denser, stronger and harder than Group 1 metals
Respuesta
- True
- False
Pregunta 6
Pregunta
Permanent hardness is caused by [blank_start]calcium sulphate[blank_end].
Respuesta
-
calcium sulphate
-
hydrogencarbonate ions
-
sodium hydroxide
Pregunta 7
Pregunta
Which of these is the order water is treated in?
Respuesta
-
Screening, removal of solids and microbes, filtration and chlorination
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Filtration, screening, chlorination, removal of solids and microbes
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Removal of solids and microbes, filtration, chlorination and screening
Pregunta 8
Pregunta
Equilibrium means the amounts of reactants and products reach a certain balance and stay there.
Respuesta
- True
- False
Pregunta 9
Pregunta
If you raise the pressure, it will encourage the reaction which produces [blank_start]less[blank_end] volume.
Respuesta
-
less
-
more
Pregunta 10
Pregunta
What conditions are needed for the Haber Process?
Respuesta
-
Pressure: 200 atm
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Temperature: 450 degrees C
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Catalyst : Iron
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Pressure: 900 atm
-
Temperature: 20 degrees C
-
Catalyst: Magnesium
Pregunta 11
Pregunta
Alcohols have the functional [blank_start]-OH[blank_end] group.
Respuesta
-
-OH
-
-COOH
-
-COO-
Pregunta 12
Pregunta
The first 3 alcohols...
Respuesta
-
Dissolve completely in water to form neutral solutions
-
React with sodium to give hydrogen & alkoxides
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React with carboxylic acids to form an ester + water
-
Don't react with anything
-
Are used as fuels and solvents
-
Are poisonous
Pregunta 13
Pregunta
Carboxylic acids don't ionise completely (release H+ ions) and so form [blank_start]weak acidic[blank_end] solutions.
Respuesta
-
weak acidic
-
strong acidic
-
weak alkaline
-
strong alkaline
Pregunta 14
Pregunta
How do you work out concentration?
Respuesta
-
Moles / Volume
-
Moles * Volume
-
Mass / Relative Formula Mass
Pregunta 15
Pregunta
In an exothermic reaction, the energy released in bond formation is [blank_start]greater[blank_end] than the energy used in breaking old bonds.
Respuesta
-
greater
Pregunta 16
Pregunta
What are the problems with using hydrogen fuel cells?
Respuesta
-
Hydrogen is gas - takes up more space to store
-
It's very explosive - difficult to store safely
-
Hydrogen fuel is usually made from hydrocarbons or electrolysis of water - fossil fuels & electricity
-
They produce pollutants
-
They don't produce much power
Pregunta 17
Pregunta
Aluminium hydroxide is a white precipitate at first but redissolves in excess NaOH to form a [blank_start]colourless[blank_end] solution.
Respuesta
-
colourless
-
pink
-
blue
Pregunta 18
Pregunta
To test for halide ions, add dilute nitric acid followed by [blank_start]silver nitrate solution[blank_end].
Respuesta
-
silver nitrate solution
-
dilute hydrochloric acid
-
barium chloride solution
Pregunta 19
Pregunta
To test for a sulphate ion, add dilute HCl followed by [blank_start]barium chloride solution[blank_end].
Respuesta
-
barium chloride solution
-
silver nitrate solution
-
nitric acid
Pregunta 20
Pregunta
A more reactive halogen can displace a less reactive halogen from an aqueous solution of its salt.
Respuesta
- True
- False
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