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Question 880004
JEE Chemistry · Medium

s-Block Elements: Flame test MCQ

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Flame testMediumQuestion 880004

Question

The flame test colours for Na and K are:
  1. A
    Na: golden yellow; K: lilac/violet
    Correct
  2. B
    Na: red; K: yellow
  3. C
    Na: blue; K: green
  4. D
    Na: white; K: orange

Correct answer

Na: golden yellow; K: lilac/violet

Explanation

Flame test colours: Li (crimson red), Na (golden yellow), K (lilac/violet), Rb (red-violet), Cs (blue). Na contaminates K tests — use cobalt blue glass to filter yellow and see lilac of K.

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