Colour of bead in borax bead test is mainly due to formation of

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p-Block Elements - I

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Colour of the bead in borax bead test is mainly due to the formation of

metal oxides

boron oxide

metal metaborates

elemental boron

Solution

Correct option $(\mathrm{C})$ metal metaborates

Explanation:

Borax on strong heating loses its water of crystallization and then shrinks forming a transparent glassy bead of sodium metaborate and boric anhydride. Boric anhydride, being non-volatile displaces more volatile acidic oxides and combine with basic oxides present to form metaborates which are identified through their characteristic colours

Standard 11

Chemistry

The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

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Anhydrous aluminium chloride fumes in moist air owing to the formation of

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White fumes appear around the bottle of anhydrous aluminium chloride. Give reason.

easy

$N{a_2}{B_4}{O_7}\xrightarrow{x}{H_3}B{O_3}\xrightarrow{\Delta }{B_2}{O_3}\xrightarrow{y}B$

Here $X, Y$ are respectively

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Which one of the following is the correct statement ?

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Colour of the bead in borax bead test is mainly due to the formation of

Solution

Similar Questions

The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

Anhydrous aluminium chloride fumes in moist air owing to the formation of

White fumes appear around the bottle of anhydrous aluminium chloride. Give reason.

$N{a_2}{B_4}{O_7}\xrightarrow{x}{H_3}B{O_3}\xrightarrow{\Delta }{B_2}{O_3}\xrightarrow{y}B$ Here $X, Y$ are respectively

Which one of the following is the correct statement ?

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$N{a_2}{B_4}{O_7}\xrightarrow{x}{H_3}B{O_3}\xrightarrow{\Delta }{B_2}{O_3}\xrightarrow{y}B$

Here $X, Y$ are respectively