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Here are some sample GCSE chemistry questions from our library.
12 sample GCSE chemistry questions
1. Chemical cells produce a voltage. This voltage can be altered depending on what the electrodes are made from. Look at the electrochemical series and determine the best combination of electrodes to gain the highest voltage from the chemical cell.
– Cobalt and iron
– Nickel and chromium
– Hydrogen and gold
– Magnesium and copper
2. The empirical formula for an alkane is CnH2n+2 What is the empirical formula for an alkene?
3. What is the concentration of 0.1dm3 sulphuric acid, where it has neutralised 0.032dm3 of 0.8M sodium hydroxide? To two decimal places, how many moles are there in the sodium hydroxide?
4. Continuing from the above, account for the number of moles of sulphuric acid which react with the number of moles of sodium hydroxide. Answer to two decimal places.
5. Using the answers from the previous questions, what is the concentration of the sulphuric acid? Answer to one decimal place.
6. Select the correct anode half equation for copper chloride (CuCl₂).
7. The two substances are either pure iron or cast iron. Cast iron is made up of 3% carbon, 2% silicon, and 95% iron. Which substance is pure iron, and which is cast iron?
8. True or false: energetics is the study of chemical changes caused by gravity
9. True or false: a calorimeter measures the amount of heat involved in a chemical reaction
10. True or false: enthalpy change means the amount of heat evolved, or absorbed, in a reaction carried out at constant pressure
11. True or false: if the enthalpy change is a negative number, it means the energy has been absorbed
12. Fill in the gaps using the appropriate words from the list below: “Pure substances melt and boil at __________ temperatures or within a narrow range. __________ substances tend to have a wider range of melting and boiling points as they consist of different substances that tend to __________ the melting point and broaden the melting point range.”
Answers to our GCSE chemistry questions
1. Magnesium and copper
3. 0.03 moles
4. 0.02 moles
7. A is pure iron, and B is cast iron
12. Specific, impure, lower
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