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Which gas has the fastest rate of diffusion?CorrectIncorrect
In which state does 1 dm3 of methane contain the most particles?CorrectIncorrect
Which statement explains why isotopes of the same element have the same chemical properties?CorrectIncorrect
The electronic structures of atoms P and Q are shown.
P and Q form an ionic compound.
What is the formula of the compound?CorrectIncorrect
Fermentation of sugar produces a mixture of ethanol solution and solid yeast.
How is the solid yeast removed from the mixture?CorrectIncorrect
Which row explains why copper is a good conductor of electricity at room temperature?
A no no B no yes C yes no D yes yesCorrectIncorrect
Which pair of statements about diamond and graphite is correct?
Sodium nitride contains the nitride ion, N3–.
Sodium nitride is unstable and decomposes into its elements.
What is the equation for the decomposition of sodium nitride?CorrectIncorrect
Compound X contains carbon, hydrogen and oxygen only.
By mass, it contains 26.7% carbon and 2.2% hydrogen.
What is the empirical formula of X?CorrectIncorrect
Caesium fluoride is an ionic compound.
Which statements about caesium fluoride are correct?
- It conducts electricity when solid.
- It has a high melting point.
- It is soluble in water.
- It is highly volatile.
Which diagram shows the direction of movement of ions and electrons during the electrolysis of molten sodium chloride?
Calcium carbonate, CaCO3, reacts with dilute hydrochloric acid to produce carbon dioxide.
The equation for the reaction is shown. The relative formula mass of calcium carbonate is 100.
CaCO3 + 2HCl → CaCl2 + H2O + CO2
10 g of calcium carbonate is reacted with an excess of dilute hydrochloric acid.
Which mass of carbon dioxide is produced?CorrectIncorrect
Molten sodium chloride and concentrated aqueous sodium chloride are electrolysed using platinum electrodes.
What are the products at the negative electrode (cathode) in each electrolysis?
A hydrogen hydrogen B hydrogen sodium C sodium hydrogen D sodium sodiumCorrectIncorrect
An object is electroplated with silver using an aqueous silver salt as the electrolyte.
Which row is correct?
the object to be
electroplated is the
the other electrode
is made from
A anode carbon B anode silver C cathode carbon D cathode silverCorrectIncorrect
Which row describes the changes that occur in an endothermic reaction?
energy change temperature A energy given out to
decreases B energy given out to
increases C energy taken in from
decreases D energy taken in from
Which statement about fuels is correct?CorrectIncorrect
Which statement about endothermic and exothermic reactions is correct?CorrectIncorrect
The reaction used to manufacture ammonia from nitrogen and hydrogen is reversible.
An equilibrium is established between ammonia, nitrogen and hydrogen.
Which statement describes the equilibrium?CorrectIncorrect
How does increasing the concentration affect the reacting particles in a chemical reaction?
increases the proportion
of particles with the
A ✔ ✘ B ✔ ✔ C ✘ ✘ D ✘ ✔CorrectIncorrect
Methyl orange is added to dilute hydrochloric acid and to aqueous sodium hydroxide.
What is the colour of the methyl orange in each solution?
colour in dilute
colour in aqueous
A orange red B red yellow C red orange D yellow redCorrectIncorrect
Zinc oxide is an amphoteric oxide.
Which types of substances will react with zinc oxide?CorrectIncorrect
Information about some silver compounds is shown.
compound formula solubility in water silver carbonate Ag2CO3 insoluble silver chloride AgCl insoluble silver nitrate AgNO3 soluble silver oxide Ag2O insoluble
Which equation shows a reaction which cannot be used to make a silver salt?CorrectIncorrect
Aqueous ethanoic acid is a weak acid.
Aqueous sodium hydroxide is a strong base.
Aqueous ethanoic acid is neutralised by aqueous sodium hydroxide.
Which statements are correct?
- Aqueous ethanoic acid accepts protons from hydroxide ions.
- The aqueous ethanoic acid used is fully dissociated into ions.
- The aqueous sodium hydroxide used is fully dissociated into ions.
- The reaction produces a salt and water.
Three properties of element X are listed.
- It contains atoms with a full outer shell of electrons.
- It is monoatomic.
- It is unreactive.
In which part of the Periodic Table is the element placed?CorrectIncorrect
Which word equation represents a reaction that occurs?CorrectIncorrect
Which statement about the extraction of aluminium is correct?CorrectIncorrect
Metal M is mixed with copper to produce brass.
What is M?CorrectIncorrect
The table gives some properties of an element.
melting point in ∘C 3422 appearance of the element grey appearance of the chloride of the element dark blue density in g / cm3 19.2 electrical conductivity when solid good
Which other property does this element have?CorrectIncorrect
Ammonia is produced using the Haber process.
Which row shows the source of the raw materials and the reaction conditions?
A air hydrocarbons 200 200 B hydrocarbons air 450 2 C air hydrocarbons 450 200 D air hydrocarbons 450 2CorrectIncorrect
How many species are acting as bases in this reversible reaction?
HNO3 + H2O ⇋ H3O+ + NO3–CorrectIncorrect
The equation for a reaction occurring in the Contact process is shown.
2SO2 + O2 → 2SO3
What is the catalyst used in this reaction?CorrectIncorrect
Which information about carbon dioxide and methane is correct?
carbon dioxide methane A formed when vegetation decomposes ✔ ✘ B greenhouse gas ✔ ✔ C present in unpolluted air ✘ ✘ D produced during respiration ✘ ✔
✔ = correct
✘ = not correctCorrectIncorrect
The structure of an ester is shown.
What are the names of the carboxylic acid and the alcohol that react together to form this ester?
carboxylic acid alcohol A ethanoic acid ethanol B ethanoic acid propan-1-ol C propanoic acid ethanol D propanoic acid propan-1-olCorrectIncorrect
Which statements about lime are correct?
- Lime is made by heating calcium carbonate (limestone).
- Lime is used to desulfurise flue gases.
- Lime is used to treat alkaline soil.
- The chemical name for lime is calcium oxide.
Which structure is correctly named?
The structure of part of a polymer is shown.
Which monomers can be used to make this polymer?CorrectIncorrect
Carboxylic acids are made by the oxidation of alcohols.
Which carboxylic acid is produced from CH3CH2OH?CorrectIncorrect
Propene, C3H6, reacts with bromine, Br2, in an addition reaction.
Which structure represents the product of this reaction?
Which statements about ethanol are correct?
- Ethanol is used as a solvent.
- Ethanol can be made directly from ethane.
- Ethanol is a covalent compound.
Which diagram represents the structure of nylon?