If the radius of Mg2- ion- Cs- ion- O2- ion- S2- ion and Cl- ion are 0-65 A- 1-69 A- 1-40 A- 1-84 A- and 1-81 A- respectively- The co-ordination numbers of the cations in the crystals of MgS- MgO and CsCl- respectively- are -

The correct option is A 4, 6, 8 Radius ratio are as follows: Mg^2+S^2 = 0.651.84 = 0.35 Mg^2+O^2 = 0.651.40 = 0.46 Cs^+Cl^ = 1.691.81 = 0 ...

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Byju's Answer

Standard XII

Chemistry

Coordination Number

If the radius...

Question

If the radius of $M g^{2 +}$ ion, $C s^{+}$ ion, $O^{2 -}$ ion, $S^{2 -}$ ion and $C l^{-}$ ion are $0.65 A^{\circ}, 1.69 A^{\circ}, 1.40 A^{\circ}, 1.84 A^{\circ}$ and $1.81 A^{\circ}$ respectively. The co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl, respectively, are :

4, 6, 8

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5, 6, 7

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3, 5, 7

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5, 7, 7

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Solution

The correct option is A $4, 6, 8$
Radius ratio are as follows:
$\frac{M g^{2 +}}{S^{2 -}} = \frac{0.65}{1.84} = 0.35$
$\frac{M g^{2 +}}{O^{2 -}} = \frac{0.65}{1.40} = 0.46$
$\frac{C s^{+}}{C l^{-}} = \frac{1.69}{1.81} = 0.93$
So, we can see that the co-ordination numbers of the cations in MgS, MgO and CsCl are $4, 6$ and $8$ respectively.

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Similar questions

If the radius of Mg2+ ion, Cs+ ion, O2- ion, S2- ion and Cl- ion are 0.65 Å , 1.69 Å, 1.40 Å, 1.84 Å, and 1.81 Å respectively. Then the co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl respectively are:

Q. If the radius of

M g^{2 +}

ion,

C s^{+}

ion,

O^{2 -}

ion

S^{2 -}

ion and

C l^{-}

ion are

0.65 A^{o}

1.69 A^{o}

1.40 A^{0}

1.84 A^{o}

and

1.81 A^{o}

respectively. The co-ordination numbers of the cations in the crystals of

M g S

M g O

and

C s C l

are, respectively :

Q. Assertion :In

C s C l

crystal, the co-ordination number of

C s^{+}

ions is

8

. Reason:

C l^{-}

ions in

C s C l

adopt face centred cubic structure.

Q. If the length of body diagonal for

CsCl

, which crystallises into a cubic structure with

{Cl}^{-}

ions at the corners and

{Cs}^{+}

ions at the centre of unit cell is

7 ˚ A

and the radius of

{Cs}^{+}

ion is

1.69 ˚ A

. The radius of

{Cl}^{-}

ion?

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If the radius of Mg2+ ion, Cs+ ion, O2− ion, S2− ion and Cl− ion are 0.65A∘,1.69A∘,1.40A∘,1.84A∘ and 1.81A∘ respectively. The co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl, respectively, are :

The correct option is A 4,6,8Radius ratio are as follows:Mg2+S2−=0.651.84=0.35Mg2+O2−=0.651.40=0.46Cs+Cl−=1.691.81=0.93So, we can see that the co-ordination numbers of the cations in MgS, MgO and CsCl are 4, 6 and 8 respectively.

If the radius of $M g^{2 +}$ ion, $C s^{+}$ ion, $O^{2 -}$ ion, $S^{2 -}$ ion and $C l^{-}$ ion are $0.65 A^{\circ}, 1.69 A^{\circ}, 1.40 A^{\circ}, 1.84 A^{\circ}$ and $1.81 A^{\circ}$ respectively. The co-ordination numbers of the cations in the crystals of MgS, MgO and CsCl, respectively, are :