JEE Main Chemistry question

How many among the following impart colour to the Bunsen flame, when a flame test is carried out? Ba, Mg, Ca, Be, Na, Sr, K

Answer: 5

Solution

Ba (apple-green), Ca (brick-red), Na (golden-yellow), Sr (crimson) and K (violet) each impart a characteristic flame colour — five elements in total.

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Question ID VK-138167