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Standard XII

Chemistry

Arrhenius Acid

MgO crystalli...

Question

$M g O$ crystallized as rock salt. The number of nearest oxide ions to $M g^{2 +}$ ion is:

two

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four

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six

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twelve

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Solution

The correct option is C six
The coordination number of an ion is defined as a number of oppositely charged ions surrounding that particular ion in the crystal lattice. The crystal arrangement of rock salt is shown in the figure. It shows that the coordination number of each ion is $6$ . So, the coordination number of nearest oxide ions to $M g^{2 +}$ ion is $6$ .

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Similar questions

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. 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 :

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:

Consider the structure of rock salt. How many Na+ ions occupy the second nearest neighbour location of an Na+ ion?

Q. Starting from the rock salt structure, the crystal structure type generated by the removal of all ions of one type is:

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MgO crystallized as rock salt. The number of nearest oxide ions to Mg2+ ion is:

$M g O$ crystallized as rock salt. The number of nearest oxide ions to $M g^{2 +}$ ion is: