Question

Give answers of following questions : explain ligand and write the four postulates of Werner's theory.​

Answer 1

$\huge\mathtt\pink{Answer}$

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☣️️ $\purple { \underline{ \underline { \bf{Ligand\::}}}}$

A molecular or ion which is co-ordinated to the metal atom or ion in a coordination compound is called Ligand or donor group.

✳️️️ $\</strong><strong>g</strong><strong>r</strong><strong>e</strong><strong>e</strong><strong>n</strong><strong>{ \underline{ \underline { \bf{</strong><strong>P</strong><strong>o</strong><strong>s</strong><strong>t</strong><strong>u</strong><strong>l</strong><strong>a</strong><strong>t</strong><strong>e</strong><strong>s</strong><strong>\:</strong><strong>O</strong><strong>f</strong><strong>\</strong><strong>:</strong><strong>Werner</strong><strong>'</strong><strong>s</strong><strong>\</strong><strong>:</strong><strong>theory</strong><strong>\</strong><strong>:</strong><strong>:}}}}$

→ Most of the metallic elements exhibit two types of valences.

• Primary valence or principal Valence and
• Secondary valence.

→ Every metal tends to satisfy both of its primary and secondary valences.

→ Every metal has a fixed number of secondary valence.

→ The secondary valence is always directed towards fixed position in space.

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$\huge\red{ \underline{ \underline{ \bf{Be\:Brainly}}}}$

Answer 2

Answer:

( a ) A metal shows two kinds of valencies viz primary valency and secondary valency.Negative ionssatisfy primary valenciesand secondaryvalencies are filled by bothneutral ions  and negative ions.

( b ) A metal ion has a fixed  amount of secondary valencies about the central atom. These valenciesalso orient themselves in a particular  direction in the space provided to the definite geometry of the coordination compound.

( c ) Secondary valencies cannot be ionized , while primary valencies can usually be ionized.