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formulation is a pure substance with a fixed melting point.","correct":false,"explanation":"A pure substance contains only one substance, whereas a formulation contains several components combined in set amounts. Its defining feature is the fixed recipe, not a melting point."},{"text":"A formulation is a mixture made with randomly chosen proportions.","correct":false,"explanation":"Random proportions would make different batches vary, which is contrary to a formulation. The components must be combined according to a planned, fixed recipe."},{"text":"A formulation is a new compound formed when substances react completely.","correct":false,"explanation":"A compound forms through chemical bonding, but a formulation is a mixture whose components are combined in chosen amounts without necessarily reacting to form a new substance."}]},{"id":"d7f47d2d-d8c5-4b01-a9f0-01928821b573","cardType":"basic","points":1,"front":"How are components added to a formulation?","back":"Each component is added in a deliberately measured quantity.","mcqOptions":[{"text":"Each component is added in a deliberately measured quantity.","correct":true,"explanation":"Carefully measuring every component ensures that the formulation follows its recipe and that each batch contains the intended proportions."},{"text":"Each component is added in a randomly estimated quantity.","correct":false,"explanation":"Estimating quantities randomly would alter the proportions between batches. Formulations require measured amounts so their composition and properties remain controlled."},{"text":"Each component is added in an equal quantity.","correct":false,"explanation":"Components do not necessarily need equal amounts; the recipe may require very different quantities. What matters is that each amount is deliberately measured."},{"text":"Each component is added in a maximum possible quantity.","correct":false,"explanation":"Adding as much as possible would ignore the recipe and could change the product's properties. Formulations use specific measured quantities for each component."}]},{"id":"979b7c7e-b487-4b20-95af-d20309c04d1e","cardType":"basic","points":1,"front":"What happens if the proportions in a formulation change?","back":"Changing the proportions changes the product's properties.","mcqOptions":[{"text":"Changing the proportions changes the product's properties.","correct":true,"explanation":"The proportions determine the formulation's composition, so changing them can alter properties such as colour, strength, texture, or performance."},{"text":"Changing the proportions leaves the product's properties unchanged.","correct":false,"explanation":"A formulation's properties depend on the relative amounts of its components. Keeping the same properties requires keeping the proportions the same."},{"text":"Changing the proportions changes only the product's name.","correct":false,"explanation":"Changing component ratios affects the product's composition and therefore its physical or chemical properties, rather than merely changing its name."},{"text":"Changing the proportions turns the product into an element.","correct":false,"explanation":"Altering ratios does not create an element, because an element contains one type of atom. It changes the composition and properties of the mixture."}]},{"id":"056e7ae0-f036-479d-9a82-df3e85334f4f","cardType":"basic","points":1,"front":"Why is a formulation's recipe tightly controlled?","back":"The recipe is kept the same so every batch has consistent properties.","mcqOptions":[{"text":"The recipe is kept the same so every batch has consistent properties.","correct":true,"explanation":"Using the same recipe keeps the composition consistent, ensuring that different batches have the same intended characteristics and performance."},{"text":"The recipe is changed each time so every batch has different properties.","correct":false,"explanation":"Changing the recipe would make batches vary and reduce reliability. Tight control is used specifically to give every batch consistent properties."},{"text":"The recipe is kept the same so every batch has maximum density.","correct":false,"explanation":"A fixed recipe is not intended specifically to maximise density. It is controlled so all batches reproduce the same required range of properties."},{"text":"The recipe is changed each time so every batch has the lowest cost.","correct":false,"explanation":"Changing ingredients or amounts might reduce cost but would make the product inconsistent. A tightly controlled recipe prioritises repeatable properties."}]},{"id":"32a2096a-1ae6-4d86-a505-42da0ba19e50","cardType":"basic","points":1,"front":"Why is a formulation still a mixture?","back":"The components are not chemically bonded, so they retain their own properties.","mcqOptions":[{"text":"The components are not chemically bonded, so they retain their own properties.","correct":true,"explanation":"A mixture contains substances that are combined physically rather than chemically bonded, so each component retains its own identity and properties."},{"text":"The components are chemically bonded, so they form a new compound.","correct":false,"explanation":"Chemical bonding between components would produce a compound, not a mixture. In a formulation, the components remain separate substances with their own properties."},{"text":"The components are all made from the same element, so they retain their own properties.","correct":false,"explanation":"A mixture can contain different elements and compounds. Its components retain their properties because they are not chemically bonded, not because they share one element."},{"text":"The components are changed into identical particles, so they retain their own properties.","correct":false,"explanation":"Making identical particles would not describe a mixture of separate components. The components retain their properties because no chemical bonding changes them into a new substance."}]},{"id":"b4f74748-0498-4520-bd6c-8514d41e37c3","cardType":"basic","points":1,"front":"How could the components of a formulation be separated?","back":"They can be separated by physical means.","mcqOptions":[{"text":"They can be separated by physical means.","correct":true,"explanation":"Because the components are not chemically bonded, techniques such as filtration, distillation, or chromatography can separate them using differences in physical properties."},{"text":"They can be separated by chemical means only.","correct":false,"explanation":"Chemical reactions are not required to separate a mixture. Physical techniques can separate its components because they retain their individual properties."},{"text":"They can be separated by nuclear means.","correct":false,"explanation":"Nuclear processes change atomic nuclei and are unnecessary for separating a formulation. Physical separation methods are appropriate because the components are not chemically bonded."},{"text":"They can be separated by burning the mixture completely.","correct":false,"explanation":"Burning causes chemical reactions and may destroy the original components, rather than separate and recover them. Physical methods separate the components without changing their identities."}]},{"id":"77ad8469-044e-4038-a949-7451ea63aeb9","cardType":"basic","points":1,"front":"What is the function of pigment in paint?","back":"The pigment provides colour.","mcqOptions":[{"text":"The pigment provides colour.","correct":true,"explanation":"Pigment particles absorb some wavelengths of visible light and reflect others, giving paint its observed colour."},{"text":"The pigment provides adhesion.","correct":false,"explanation":"Adhesion is the ability to stick to a surface and is mainly provided by the binder. Pigment's main function is to give the paint colour."},{"text":"The pigment provides waterproofing.","correct":false,"explanation":"Water resistance depends mainly on the binder and other formulation components. Pigment is included primarily to produce the desired colour."},{"text":"The pigment provides flexibility.","correct":false,"explanation":"Flexibility is controlled by the binder and other ingredients rather than the pigment. Pigment particles mainly determine the paint's colour."}]},{"id":"a0357e7a-7b1e-409e-96c0-b63837ed63d6","cardType":"basic","points":1,"front":"What is the function of the binder in paint?","back":"The binder makes the paint stick to the surface.","mcqOptions":[{"text":"The binder makes the paint stick to the surface.","correct":true,"explanation":"The binder holds pigment particles together and adheres the paint coating to the surface, helping the applied paint remain in place."},{"text":"The binder makes the paint change colour in sunlight.","correct":false,"explanation":"Colour comes mainly from the pigment, while the binder attaches the coating to the surface. Sunlight-related colour changes are not the binder's function."},{"text":"The binder makes the paint release gas from the surface.","correct":false,"explanation":"Releasing gas is not the purpose of a binder and would indicate a reaction or decomposition. The binder forms an adhering film that holds the paint in place."},{"text":"The binder makes the paint separate into its components.","correct":false,"explanation":"A binder should help hold the formulation together rather than separate it. Its key role is attaching the paint coating and binding pigment particles."}]},{"id":"1489ee57-66a2-4d54-8a14-5c105b44a128","cardType":"basic","points":1,"front":"What is the function of the solvent in paint?","back":"The solvent makes the paint flow.","mcqOptions":[{"text":"The solvent makes the paint flow.","correct":true,"explanation":"A solvent lowers the paint’s viscosity, allowing it to spread and flow smoothly during application. It can then evaporate as the paint dries."},{"text":"The solvent gives the paint colour.","correct":false,"explanation":"This confuses the solvent with the pigment, which provides the colour. The solvent makes the paint flow by reducing its viscosity."},{"text":"The solvent binds the paint together.","correct":false,"explanation":"This confuses the solvent with the binder, which holds the paint’s components together and helps them adhere. The solvent’s role is to make the paint flow."},{"text":"The solvent makes the paint opaque.","correct":false,"explanation":"Opacity mainly results from pigments and other suspended solids rather than the solvent. The solvent reduces viscosity so that the paint flows and spreads easily."}]},{"id":"3e82a00a-b805-4794-8827-0ff514e5c1b8","cardType":"basic","points":1,"front":"What do additives control in paint?","back":"Additives control drying.","mcqOptions":[{"text":"Additives control drying.","correct":true,"explanation":"Additives adjust the rate or manner in which paint dries, helping the formulation achieve the required finish and performance after application."},{"text":"Additives control colour.","correct":false,"explanation":"This confuses additives with pigments, which give paint its main colour. In this formulation, additives are included to control how the paint dries."},{"text":"Additives control bulk.","correct":false,"explanation":"This confuses additives with fillers, which can increase a paint’s bulk. Additives are used in this formulation to control the drying process."},{"text":"Additives control adhesion.","correct":false,"explanation":"This confuses additives with the binder, whose main role is to help the paint adhere to a surface. Here, additives control how the paint dries."}]},{"id":"a69fd920-654c-4910-a6d3-0c10b82aa367","cardType":"basic","points":1,"front":"What is the role of the active drug in a medicine?","back":"The active drug gives the tablet its medical effect.","mcqOptions":[{"text":"The active drug gives the tablet its medical effect.","correct":true,"explanation":"The active drug interacts with the body to produce the intended therapeutic response, such as relieving pain or treating the symptoms of an illness."},{"text":"The active drug gives the tablet its physical form.","correct":false,"explanation":"This confuses the active drug with fillers and binders, which help produce the tablet’s physical form. The active drug provides the intended medical effect."},{"text":"The active drug gives the tablet its outer coating.","correct":false,"explanation":"A separate coating material forms the tablet’s outer layer and can control dissolution. The active drug is responsible for producing the tablet’s medical effect."},{"text":"The active drug gives the tablet its structural strength.","correct":false,"explanation":"This confuses the active ingredient with binders, which help hold the tablet together. The active drug is included to produce the required medical effect."}]},{"id":"91c0f38d-0e25-4293-a445-d8fb55c345bc","cardType":"basic","points":1,"front":"Why are fillers and binders added to a tablet?","back":"Fillers and binders help give the tablet its form.","mcqOptions":[{"text":"Fillers and binders help give the tablet its form.","correct":true,"explanation":"Fillers add suitable bulk and binders hold the ingredients together, allowing the medicine to be manufactured as a tablet with a stable physical form."},{"text":"Fillers and binders help give the tablet its medical effect.","correct":false,"explanation":"This assigns the active drug’s function to the inactive ingredients. Fillers and binders provide bulk and hold ingredients together, giving the tablet its physical form."},{"text":"Fillers and binders help give the tablet its sterility.","correct":false,"explanation":"Sterility depends on controlled manufacturing and packaging, not on fillers or binders. These ingredients add bulk and hold the tablet together to create its form."},{"text":"Fillers and binders help give the tablet its active drug.","correct":false,"explanation":"The active drug is a separate ingredient selected for its medical action. Fillers and binders support manufacturing by giving the completed tablet its form."}]},{"id":"6f7395a4-d416-4e08-affe-17772f968fd8","cardType":"basic","points":1,"front":"What is the function of a tablet coating?","back":"The coating controls how the tablet dissolves.","mcqOptions":[{"text":"The coating controls how the tablet dissolves.","correct":true,"explanation":"A tablet coating can delay or regulate contact with digestive fluids, controlling where or how quickly the tablet dissolves and releases its contents."},{"text":"The coating controls how the tablet is prescribed.","correct":false,"explanation":"The prescribed dose is determined by medical guidance and the amount of active drug, not by the coating. The coating controls how the tablet dissolves."},{"text":"The coating controls how the tablet is sterilised.","correct":false,"explanation":"Sterilisation is part of the manufacturing process and is not controlled by the tablet’s coating. The coating instead controls how the tablet dissolves."},{"text":"The coating controls how the tablet is manufactured.","correct":false,"explanation":"Manufacturing conditions determine how the tablet is produced, while the coating is applied as one stage of production. Its relevant function is controlling dissolution."}]},{"id":"2afb623b-9f95-4474-8166-1f8458cf7cf2","cardType":"basic","points":2,"front":"What are petrol formulations blended from, and why?","back":"Petrol contains blended hydrocarbons and additives to burn well in an engine.","mcqOptions":[{"text":"Petrol contains blended hydrocarbons and additives to burn well in an engine.","correct":true,"explanation":"Petrol is a formulation of different hydrocarbons and carefully selected additives. Their measured proportions give the fuel suitable combustion properties for use in an engine."},{"text":"Petrol contains blended hydrocarbons and water to burn well in an engine.","correct":false,"explanation":"Water does not mix suitably with petrol or support combustion, so including it reflects a common confusion about liquid mixtures. Petrol blends hydrocarbons and additives to burn well."},{"text":"Petrol contains blended metals and additives to burn well in an engine.","correct":false,"explanation":"Petrol is not made by blending metals into a combustible liquid. It contains a mixture of hydrocarbons and additives selected to produce effective engine combustion."},{"text":"Petrol contains blended hydrocarbons and additives to stop burning in an engine.","correct":false,"explanation":"This reverses the purpose of the formulation: an engine needs the fuel to combust effectively, not remain unburned. Hydrocarbons and additives are blended so petrol burns well."}]},{"id":"1257b62a-755f-4e24-855b-19e213d7ef0b","cardType":"basic","points":3,"front":"Name three formulations besides paints, fuels, medicines and cleaning products.","back":"

Fertilisers
Alloys
Processed foods

","mcqOptions":[{"text":"

Fertilisers
Alloys
Processed foods

","correct":true,"explanation":"Fertilisers, alloys and processed foods are formulations because each is designed by combining components in carefully measured proportions to produce particular useful properties."},{"text":"

Oxygen
Copper
Carbon

","correct":false,"explanation":"Oxygen, copper and carbon are elements rather than formulations. Formulations contain multiple components in measured proportions; valid examples include fertilisers, alloys and processed foods."},{"text":"

Distilled water
Pure gold
Pure oxygen

","correct":false,"explanation":"These are pure substances, not mixtures designed from measured components. Fertilisers, alloys and processed foods are formulations because they combine ingredients in controlled proportions."},{"text":"

Sodium chloride
Carbon dioxide
Magnesium oxide

","correct":false,"explanation":"These are individual compounds with fixed chemical formulae, not formulations containing several measured components. Fertilisers, alloys and processed foods are appropriate examples of formulations."}]},{"id":"8f829e72-6c81-4ead-a926-3f4416d5c929","cardType":"basic","points":3,"front":"How does a formulation differ from a pure substance?","back":"A pure substance is one element or compound; a formulation contains several components in measured proportions.","mcqOptions":[{"text":"A pure substance is one element or compound; a formulation contains several components in measured proportions.","correct":true,"explanation":"A pure substance has only one element or compound. A formulation is a designed mixture whose components are combined in carefully measured proportions for a specific purpose."},{"text":"A pure substance contains several measured components; a formulation is one element or compound.","correct":false,"explanation":"This reverses the definitions. A pure substance consists of one element or compound, whereas a formulation is a designed mixture containing several components in measured proportions."},{"text":"A pure substance is one type of atom; a formulation contains several elements chemically bonded.","correct":false,"explanation":"A pure compound can contain more than one type of atom, and formulation components are mixed rather than necessarily chemically bonded. Formulations contain several components in measured proportions."},{"text":"A pure substance is one element or compound; a formulation contains several components in random proportions.","correct":false,"explanation":"The first definition is accurate, but formulations are not random mixtures. Their components are combined in carefully measured proportions to give the product specific properties."}]},{"id":"9d2b5a22-97a6-4609-91c2-ddbe4cade80f","cardType":"basic","points":2,"front":"What evidence shows that a product is a formulation?","back":"It contains components in fixed proportions, combined for a particular purpose.","mcqOptions":[{"text":"It contains components in fixed proportions, combined for a particular purpose.","correct":true,"explanation":"Fixed proportions show that the components are carefully controlled, while the particular purpose distinguishes a formulation from an ordinary mixture made without a specific function."},{"text":"It contains components in variable proportions, combined for a particular purpose.","correct":false,"explanation":"Variable proportions would make the product inconsistent between batches. A formulation must contain components in fixed proportions so it reliably performs its intended purpose."},{"text":"It contains components in fixed proportions, combined without a particular purpose.","correct":false,"explanation":"A fixed recipe alone is insufficient evidence because formulations are designed for a particular purpose. The stated purpose is what links the controlled composition to the product’s function."},{"text":"It contains one component in fixed proportions, combined for a particular purpose.","correct":false,"explanation":"A formulation contains several components in controlled amounts, not just one. The proportions of all components contribute to the product’s properties and intended purpose."}]},{"id":"b23495a2-96c8-45e3-bc35-ec633744d0e6","cardType":"basic","points":2,"front":"Why is calling a product simply a mixture incomplete when identifying a formulation?","back":"A formulation has a controlled, purposeful recipe, rather than merely being any mixture.","mcqOptions":[{"text":"A formulation has a controlled, purposeful recipe, rather than merely being any mixture.","correct":true,"explanation":"The defining feature is that a formulation is deliberately designed with controlled amounts of components to produce a product with particular properties or a specific purpose."},{"text":"A formulation has an uncontrolled, purposeful recipe, rather than merely being any mixture.","correct":false,"explanation":"An uncontrolled recipe would not give consistent composition or performance. Formulations use controlled proportions, although their components are still combined for a purposeful outcome."},{"text":"A formulation has a controlled, accidental recipe, rather than merely being any mixture.","correct":false,"explanation":"Accidental combinations are ordinary mixtures rather than formulations. The recipe must be deliberately designed and controlled to make a product with a particular purpose."},{"text":"A formulation has a variable, purposeful recipe, rather than merely being any mixture.","correct":false,"explanation":"A purposeful product still needs consistent quantities of its components. Variable proportions can alter its properties, so they do not describe the controlled recipe of a formulation."}]},{"id":"5fedbd4d-6881-4cb8-b5b8-960e13a2a2ce","cardType":"cloze","points":null,"front":"A formulation is a [ ] made to a fixed recipe.","back":"A formulation is a mixture made to a fixed recipe.","mcqOptions":[{"text":"mixture","correct":true,"explanation":"A formulation is a mixture designed for a particular purpose, with its components combined in carefully measured proportions according to a fixed recipe."},{"text":"compound","correct":false,"explanation":"A compound contains elements chemically bonded in fixed proportions, whereas a formulation is a mixture of substances combined in measured quantities to a fixed recipe."},{"text":"element","correct":false,"explanation":"An element consists of only one type of atom, whereas a formulation contains multiple substances mixed in carefully controlled proportions for a particular purpose."},{"text":"molecule","correct":false,"explanation":"A molecule is a group of atoms joined by chemical bonds, whereas a formulation is a mixture prepared using specific proportions of its components."}]},{"id":"b45ab9cb-6699-4641-90ba-2eaf5cc6bbfb","cardType":"cloze","points":null,"front":"Each component of a formulation is present in a [ ].","back":"Each component of a formulation is present in a measured quantity.","mcqOptions":[{"text":"measured quantity","correct":true,"explanation":"Each component must be included in a measured quantity so the formulation follows its fixed recipe and produces consistent properties and performance."},{"text":"random quantity","correct":false,"explanation":"Random amounts would change the formulation’s composition and could alter its performance. The correct idea is that every component is included in a measured quantity."},{"text":"unlimited quantity","correct":false,"explanation":"A formulation cannot contain an unlimited amount of a component because its recipe controls the composition. Each component must be present in a measured quantity."},{"text":"changing quantity","correct":false,"explanation":"Changing amounts between products would prevent consistent results and violate the fixed recipe. Components in a formulation are present in a measured quantity."}]},{"id":"c94dd6d9-52fa-4951-b9a1-9fbbe3f4d096","cardType":"cloze","points":null,"front":"Two products with the same ingredients can behave differently when their [ ] differ.","back":"Two products with the same ingredients can behave differently when their proportions differ.","mcqOptions":[{"text":"proportions","correct":true,"explanation":"Changing the proportions changes the relative amounts of the ingredients, which can alter properties such as strength, texture, concentration, or effectiveness even when the ingredients stay the same."},{"text":"names","correct":false,"explanation":"Changing the names of ingredients does not change their chemical amounts or behaviour. Different proportions, rather than labels, can make products with the same ingredients behave differently."},{"text":"colours","correct":false,"explanation":"Colour differences may indicate a visual change but do not generally explain altered behaviour when ingredients are unchanged. The relevant factor is the proportions of those ingredients."},{"text":"states","correct":false,"explanation":"The physical states of ingredients are not the intended comparison here. Products with the same ingredients behave differently because their relative proportions can change the formulation’s properties."}]},{"id":"b840246f-9590-47db-8f2d-a672655c3a10","cardType":"cloze","points":null,"front":"In a 500 mg paracetamol tablet, the drug is the [ ].","back":"In a 500 mg paracetamol tablet, the drug is the active part.","mcqOptions":[{"text":"active part","correct":true,"explanation":"The drug produces the tablet’s medical effect, so it is the active part. Other ingredients help form, protect, or deliver the tablet without treating the condition."},{"text":"inactive part","correct":false,"explanation":"The drug is responsible for the tablet’s medical action, so it is active. Fillers and coatings are usually the inactive parts that support manufacture or delivery."},{"text":"coating part","correct":false,"explanation":"A coating surrounds and protects a tablet, but the drug inside causes the medical effect. Therefore, the drug is the active part of the formulation."},{"text":"filler part","correct":false,"explanation":"A filler adds bulk or helps the tablet form correctly, but it does not provide the treatment. The drug is the active part responsible for the medical effect."}]},{"id":"37ee8cb3-edd5-4766-a6c1-d4ebabcc5afc","cardType":"cloze","points":null,"front":"The filler and coating of a paracetamol tablet have [ ].","back":"The filler and coating of a paracetamol tablet have no medical effect.","mcqOptions":[{"text":"no medical effect","correct":true,"explanation":"The filler and coating support the tablet’s size, shape, protection, or release, but they do not produce the intended medical effect provided by the drug."},{"text":"a strong medical effect","correct":false,"explanation":"The drug, rather than the filler or coating, produces the tablet’s medical effect. These additional components have supporting manufacturing or delivery roles."},{"text":"the main medical effect","correct":false,"explanation":"The main medical effect comes from the active drug. Filler and coating may affect handling or release, but they do not themselves provide that treatment."},{"text":"an unpredictable medical effect","correct":false,"explanation":"These components are included for physical or delivery purposes, not as medicines with uncertain effects. The filler and coating have no medical effect in the formulation."}]},{"id":"56aacdf0-abb9-44b4-a19b-25a6fc096533","cardType":"cloze","points":null,"front":"A formulation's components are not chemically [ ].","back":"A formulation's components are not chemically bonded.","mcqOptions":[{"text":"bonded","correct":true,"explanation":"The components of a formulation are physically combined according to a recipe. They are not chemically bonded, so each substance retains its own chemical identity."},{"text":"separated","correct":false,"explanation":"Although the components are not chemically bonded, they are combined in the formulation rather than chemically separated. The correct description is that they are not bonded."},{"text":"reactive","correct":false,"explanation":"Some components may be capable of reacting, but this word does not describe their relationship in a formulation. They are mixed without being chemically bonded."},{"text":"dissolved","correct":false,"explanation":"Dissolving is only one possible physical process and does not apply to every formulation. The general point is that components are not chemically bonded."}]}]}],"examCountdown":{"examDate":"2027-05-17","paperLabel":"Paper 1"},"heading":"8.1.2 Formulations","title":"8.1.2 Formulations Flashcards","topbar":{"backHref":"/gcse/chemistry/aqa/flashcards"},"topicSidebar":"$L37"}]}],"topicId":"f3e020f7-93ec-5b88-bccf-639f2cae3dbc","walled":"$L38"}],"$L39","$L3a"]