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.

Question

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 the Reason is the correct explanation of the Assertion (B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion (C) If Assertion is true but Reason is false (D) If both Assertion and Reason are false

Tardigrade Admin · Accepted Answer

Borax, when heated at about 740° C, forms a glassy bead. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/2f11a5089cf5dbeebb8d76d8a0f9ee96-.png" /> This glassy bead gives different colour beads with different cations. Hence, it is used to identify cations in qualitative analysis. This test is called borax bead test.

Q. Assertion Coloured cations can be identified by borax bead test.
Reason Transparent bead $(N a B O_{2} + B_{2} O_{3})$ forms coloured bead with coloured cation.

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion

If Assertion is true but Reason is false

If both Assertion and Reason are false

Borax, when heated at about $74 0^{\circ} C$ , forms a glassy bead.

This glassy bead gives different colour beads with different cations. Hence, it is used to identify cations in qualitative analysis. This test is called borax bead test.

Q. Assertion Coloured cations can be identified by borax bead test. Reason Transparent bead (NaBO2​+B2​O3​) forms coloured bead with coloured cation.