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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

Pure Substances (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Pure Substances' from the broader topic Chemical Analysis. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

How can the pale lilac flame of potassium be more easily seen when sodium contamination produces a strong yellow flame?
Why does the Rf value of a dye not change when the solvent front is allowed to travel farther up the paper?
Which reagent and observation indicate the presence of sulfate ions in an aqueous sample?
When excess solid carbonate remains after adding it to acid to make a salt, which observation would show that the carbonate is in excess?
What is the immediate observable result when silver nitrate solution is added to an acidified solution that contains chloride ions?
Which indicator and colour change is suitable when titrating a strong acid with a strong base?
Which observation is the best indicator that a solid sample is a pure substance rather than a mixture?
Which simple test and result identify oxygen gas in a laboratory test?
Which single step is essential to obtain pure dry crystals from a salt solution after dissolving and filtering?
Which result shows that a solid sample contains carbonate ions when treated with dilute acid?
Which colour is produced in a flame test for sodium ions?