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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.Incorrect: 0
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Question 1
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Which statement correctly describes why an instrumental technique is often preferred over a simple spot test in chemical analysis?
Which reagent and observation indicate the presence of sulfate ions in an aqueous sample?
Which of the following best describes a pure chemical substance?
Which instrument separates ions by mass and can identify isotopes and relative atomic masses?
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 test result indicates the presence of ammonia gas?
Which instrumental technique is commonly used to identify metal ions by their characteristic emission lines?
Which simple test and result identify hydrogen gas in a laboratory test?
Which observation is the best indicator that a solid sample is a pure substance rather than a mixture?
Which reagent would you add to test for sulfate ions, and what is the expected result?
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