Borax-bead test is responded by ?

divalent metals

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heavy metals

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light metals

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metals which form coloured metaborates.

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Solution

The correct option is C metals which form coloured metaborates.
Answer:- (D) metals which form coloured metaborates
When the glossy bead is dipped in metal oxide and heated, the corresponding metal metaborates are formed. The characteristic colour of these metaborates enables us to identify the metal.
Thus, Borax-bead test can only be responded by metals which forms coloured metaborates.

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