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The oxidation number of the metal in the coordination entities: Cr =x NH 3 = Cl =(-1) Thus the oxidation number is x + 0 + 3(–1) = 0 or x = 3 oxidation no. of Cr = 3

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Coordination Compounds

Short Answer Type

141. Specify the oxidation numbers of the metals in the following coordination entities:
[PtCl₄]^2–

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142. Specify the oxidation numbers of the metals in the following coordination entities:
[CoBr₂(en)₂]⁺

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143. Specify the oxidation numbers of the metals in the following coordination entities:
K₃[Fe(CN)₆]

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144. Specify the oxidation numbers of the metals in the following coordination entities:
[Cr(NH₃)₃Cl₃]

The oxidation number of the metal in the coordination entities:
Cr =x
NH₃ =
Cl =(-1)

Thus the oxidation number is

x + 0 + 3(–1) = 0
or x = 3

oxidation no. of Cr = 3

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One Word Answers

145. Using IUPAC norms write the formulas of the following:
Tetrahydroxozincate(II).

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146. Using IUPAC norms write the formulas of the following:
Potassium tetrachloridopalladate(II).

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147. Using IUPAC norms write the formulas of the following:
Diamminedichloridoplatinum(II).

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148. Using IUPAC norms write the formulas of the following:
Potassium tetracyanidonickelate(II).

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149. Using IUPAC norms write the formulas of the following:
Pentaamminenitrito–O–cobalt(III).

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150. Using IUPAC norms write the formulas of the following:
Hexaamminecobalt(III) sulphate

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