Question:

\Mien borax is heated dining borax bead test along with CoO (Cobalt Oxide) on a loop of platinum (Pt) wire, it swells up and produces a blue colored bead. Which of the following compounds is responsible for the blue color?

Updated On: Mar 11, 2025

$\ce{Pt(BO_2)_4}$
$\ce{CO(BO_2)_3}$
$\ce{CO(BO_2)_2}$
$\ce{NaBO_2}$

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The Correct Option is C

Solution and Explanation

Answer (c)

{CO(BO_2)_2}

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Top Questions on p -Block Elements

$\textbf{Choose the correct statements about the hydrides of group 15 elements.}$
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Concepts Used:

P-Block Elements

P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of:

Group 13 Elements: Boron family
Group 14 Elements: Carbon family
Group 15 Elements: Nitrogen family
Group 16 Elements: Oxygen family
Group 17 Elements: Fluorine family
Group 18 Elements: Neon family