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Basic radical(s) which can not be identi...

Basic radical(s) which can not be identified by borax bead test:

A

`Mg^(2+)`

B

`Pb^(2+)`

C

`Fe^(3+)`

D

`Ag^(+)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
Only metal cations having unpaired electron(s) produce colour beads of metaborates.
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Knowledge Check

  • The radical can be identified by Borax Bead test is

    A
    `Mg^(2+)`
    B
    `Ca^(2+)`
    C
    `Cu^(+)`
    D
    `Cu^(2+)`

  • Assertion. Coloured cations can be identified by borax bead test. Reason. Transparent bead (NaBO_(2) + B_(2)O_(3)) forms coloured bead with coloured cation.

    A
    If both assertion and reason are true, and reason is the true explanation of the assertion.
    B
    If both assertion and reason are true, but reason not is the true explanation of the assertion.
    C
    If assertion is true, but reason is false.
    D
    If both assertion and reason are false.

  • Which gives blue bead in borax bead test ?

    A
    `Cr^(3+)`
    B
    `Co^(2+)`
    C
    `Ni^(2+)`
    D
    `Cd^(2+)`

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