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GCSE AQA Chemistry Revision - Statistics
General Stats
- This quiz has been taken 217 times
- The average score is 21 of 30
Answer Stats
| Hint | Answer | % Correct |
|---|---|---|
| The Russian Chemist who designed the periodic table. | Dimitri Mendeleev | 93%
|
| True or false: all atoms in an element are the same. | TRUE | 92%
|
| What are atoms with the same number of protons but with different numbers of neutrons? | Isotopes | 90%
|
| What is a finite resource? | One that will run out | 90%
|
| What does the state symbol (aq) indicate? | Aqueous / dissolved in water | 88%
|
| What does the state symbol (l) indicate? | Liquid | 86%
|
| What is a reversible reaction? | A reaction which can go from reactants to products but also from products to reactants | 84%
|
| The plum-pudding model of the atom | An atom consisting of tiny negative electrons (the 'plums') surrounded by a sea of positive charge (the 'pudding') | 79%
|
| How does boiling point change with the length of an alkane? | The longer the alkane, the higher its boiling point | 79%
|
| If a reaction is exothermic in the forward direction, what will it be in the reverse direction? | Endothermic | 78%
|
| What does the formula CaCO₃ tell you about the compund calcium carbonate? | It contains 1 calcium atom to 1 carbon atom to 3 oxygen atoms | 76%
|
| What is the general formula for alkanes? | CnH2n+2 | 73%
|
| How does the amount of product and reactant change at equilibrium? | Neither the product, nor the reactant change at equilibrium | 72%
|
| The first five alkanes. | Methane, ethane, propane, butane, pentane | 71%
|
| What is the formula for a mean rate of reaction in terms of products? | Quantity of product formed ÷ time taken | 71%
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| What is 'collision theory'? | The theory that chemical reactions only occur when particles collide with sufficient energy | 71%
|
| How does flammability change with the length of an alkane? | The longer the alkane, the less flammable it is | 68%
|
| What is an alloy? | A mixture of two or more elements, at least one of which is a metal | 66%
|
| How do you test for an alkene? | React it with bromine water | 66%
|
| What is nanoscience? | The study of small particles that are between 1 & 100 nanometres in size | 66%
|
| Why are pure metals soft? | Layers of metal ions are free to slide over each other | 64%
|
| What are the products of complete combustion? | Carbon dioxide and water | 60%
|
| Reasons for alloying a metal | To make it harder, to make it less reactive, etc. | 59%
|
| How is the relative formula mass calculated? | The Ar's of the individual elements that make up the compound are added together | 58%
|
| Why can alloys be harder than pure metals? | Different size of atoms disturb the layers to stop them sliding over each other | 56%
|
| What is the relative atonic mass (Ar) of an element? | The mass of an atom of the element compared to the mass of one atom of carbon-12 | 54%
|
| What are mixtures? | Two or more elements or compounds, which are not chemically combined | 53%
|
| What is a chemical reaction? | Rearranging atoms to make new chemicals | 46%
|
| Molecule definition | Any elements chemically joined | 42%
|
| What is the relative formula mass (Mr)? | The mass of a compound compared to the mass of one atom of carbon-12 | 40%
|
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