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Introduction to d and f Block Elements

The ionic rad...

Question

The ionic radii of $R b^{+} a n d I^{-}$ are 1.46 $\circ A$ and 2.16 $\circ A$ . the most probable type of structure exhibited by it is

CsCl type

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ZnS type

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NaCl type

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CaF₂type

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Solution

The correct option is C NaCl type
$\frac{r_{c}^{+}}{r_{a}^{-}} = \frac{1.46}{2.16} = 0.676$

It permits co-ordination number 6 and octahedral structure of type(NaCl).

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Similar questions

x^{+} a n d y^{-}

R b^{+}

I^{-}

1.46

2.16 ˚ A

the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is

a) caesium chloride type

b) rocksalt type

C) zinc blende type

D CaF2 type

R b^{+}

I^{-}

1.46 o A

2.16 o A

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