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How many of the following salts produce a characteristic green flame when held in a Bunsen flame? BaCl2, CaCl2, LiCl, NaCl, MgCl2

1. 1
2. 2
3. 3
4. 4

Correct answer: 1

Solution

Only BaCl2 gives the characteristic green (apple-green) flame in a Bunsen flame test. CaCl2 gives brick-red, LiCl gives crimson, NaCl gives golden-yellow, and MgCl2 gives no distinctive colored flame. The answer is 1.

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