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How many of the following s-block elements do not give characteristic colours in the flame test ? Li, Be, Ca , Ba , Sr , Mg , Na , K , Cs

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How many of the following s-block elements do not give characteristic colours in the flame test ?
Li, Be, Ca , Ba , Sr , Mg , Na , K , Cs
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1 Answer

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Correct Answer - 2
Two , Be and Mg
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