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Q.

which one of the following ions does not give borax bead test?

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a

${Cr}^{3 +}$

b

${Cu}^{2 +}$

c

${Zn}^{2 +}$

d

${Mn}^{2 +}$

answer is D.

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Detailed Solution

${Zn}^{2 +}$ ions do not give borax bead test.

The test with borax beads is only for coloured salts and zinc salts are white. Hence ${Zn}^{2 +}$ ions do not give borax bead test.

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