p - block Elements
Borax on heating strongly above its melting point melts to a liquid, which then solidifies to a transparent mass commonly known as borax-bead. The transparent glassy mass consists of:
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Single Choice
Which of the following ions cannot be detected by the borax bead or microcosmic bead test?
A$$Cu^{2+}$$
B$$Cr^{3+}$$
C$$Fe^{3+}$$
D$$Zn^{2+}$$
Correct Answer
Solution
Borax bead or microcosmic bead test is performed by coloured cations only and as $$Zn^{2+}$$ is colourless due to the absence of unpaired electron, so it cannot be detected by the borax bead or microcosmic bead test.
SIMILAR QUESTIONS
p - block Elements
The metal which does not give any color in the borax bead test is:
p - block Elements
The platinum wire which is used in borax bead test is dipped in:
p - block Elements
Glassybead is obtained by heating :
p - block Elements
Which of the following compounds is formed in borax bead test?
p - block Elements
Borax-bead test is responded by ?
p - block Elements
Glassy bead is of
p - block Elements
Blue bead can be of
p - block Elements
The flame used in Borax bead test is:
p - block Elements
Which of the following cations will turn a borax bead green in an oxidising flame?
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