A flame test on a solution gives a lilac flame. Which metal ion is present?

Answer and explanation

Correct answer: A.

  1. Step 1: Each metal ion gives a characteristic flame colour: Li crimson, Na yellow, K lilac, Ca orange-red.
  2. Step 2: Lilac matches potassium, .
Answer
.
Why not the others: : gives a yellow flame. : gives a crimson (red) flame. : gives an orange-red flame.

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