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
Borax-bead test is responded by ?
Adivalent metals
Bheavy metals
Clight metals
Dmetals which form coloured metaborates.
Correct Answer
Solution
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.
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
Which of the following ions cannot be detected by the borax bead or microcosmic bead test?
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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