Ijmb Model Questions Vol1 2025 Chemistry Question 2
Practice practical question 2 from the 2025 Ijmb Model Questions Vol1 Chemistry examination. This question covers Periodic Table, Flame Tests, Calibration and Quantitative Analysis .
A flame‑photometer was used to analyse an unknown aqueous solution for the presence of alkali metal ions. The instrument was first calibrated using standard potassium chloride (KCl) solutions as follows: | Standard concentration (ppm K⁺) | Flame intensity (arbitrary units) | |----------------------------------|------------------------------------| | 0.5 | 15 | | 1.0 | 25 | | 1.5 | 35 | | 2.0 | 45 | The calibration data are linear and pass through the points given. The unknown solution gave a flame intensity of 45 units and produced a lilac flame colour. Answer the following questions.
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This is Ijmb Model Questions Vol1 2025 Chemistry Question 2. It is one of the practical questions from the 2025 Ijmb Model Questions Vol1 Chemistry examination.
The question covers Periodic Table, Flame Tests, Calibration and Quantitative Analysis .
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