Questions
Borax is heated in a bunsen burner flame with a compound X on a loop of platinum wire. A blue colored bead of compound Y is formed. Identify X and Y.
| X | Y | |
| (1) | Ca(BO2)2 | CoO |
| (2) | CoO | Co(BO2)2 |
| (3) | CoO2 | Co(BO2)2 |
| (4) | CoO | CoBO2 |
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By Expert Faculty of Sri Chaitanya
a
1
b
2
c
3
d
4
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Correct option is B
The borax bead test can be used to identify transition metals as their metaborates have characteristic colours. CoO(X) on a loop of platinum wire, a blue colored Co(BO2)2 (Y) bead is formed. Therefore, X and Y are CoO and Co(BO2)2 respectively and the correct option is (b).Similar Questions
Borax is used as a cleansing agent because on dissolving in water, it gives:
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