Question

A dark green bead in the borax bead test indicates the presence

Answer 1

Answer:

A dark green bead in the borax bead test indicates the presence of a particular metal such as chromium, vanadium and uranium.

Explanation:

Borax bead test is called green bead or blister test. This borax test is an analytical test to identify the metals in the minerals. In this test oxides of these metals are able to produce characteristics colors when exposed to a burner flame. A small loop made up of platinum or nichrome wire is heated on a Bunsen burner flame until red hot. Red hot loop is dipped into powdered borax and a colorless transparent glass like beads are formed upon keeping on the hottest part of the flame.

Answer 2

A dark green bead in the borax bead test indicates the presence of a particular metal such as Molybdenum, chromium, vanadium, uranium and Iron.

Explanation:

• The bead test also referred to as borax bead test,It is an analytical method used to identification of some metals.
• The test's assumption is that when subjected to a burner flame, oxides of these metals generate distinctive colors.
• Sometimes the test is used to define the mineral metals.

Procedure:

• A tiny platinum wire loop is heated up to red hot on a Bunsen burner flame.
• Red warm loop is plunged into powdered borax and a colorless transparent glass like beads is created when the hottest portion of the flame is maintained and metal gives distinctive colors.