AB Crystallises in a B.C.C lattice with edge length. a as 387 Pm. The distance between two oppositely charged ions in the lattice is

1. 300 Pm

2. 335 Pm

3. 250 Pm

4. 200 Pm

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In calcium fluoride structure, the coordination numbers of calcium and fluoride ions respectively are

1. 6 and 8

2. 8 and 8

3. 4 and 8

4. 8 and 4

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In a body-centred cubic arrangement, A ions occupy the centre while B ions occupy the corners of the cube. The formula of the solid is

1. AB

2. AB2 

3. A2B

4. AB3 

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If three elements A, B and C crystallized in cubic solid lattice with A atoms at corners, B atoms at cube centres and C atoms at the edges, the formula of the compound is

1. ABC

2. ABC3 

3. AB3C

4. A3B2C3 

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In a cubic unit cell, seven of the eight corners are occupied by atom A and having of faces are occupied of B. The general formula of the substance having this type structure would be

1. A7B14

2. A14B7

3. A7B24

4. A9B24

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In a cubic closed packed structure of mixed oxides, the lattice is made up of oxide ions, 20% of tetrahedral Voids are occupied by divalent A2+ ions and 50% of the octahedral voids by trivalent B3+. The formula of the oxide is?

1. A4B5O10

2. A2B5O5

3. A2BO

4. A4B5O8 

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A compound formed by elements A and B crystallizes in cubic structure where A atoms are at the corners or a cube and B atoms are at the face centre. The formula of the compound is :

1. AB

2. AB2

3. AB3

4. AB4

Subtopic:  Introduction & Crystal System |
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The radius of Ag+ ion is 126 pm while that of I- ion is 216 pm. The coordination number of Ag in AgI is

1. 8

2. 6

3. 4

4. 2

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Which of the following crystals have 6:6 coordination?

1. MnO

2. NH4I

3. ZnS

4. none of these

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TiO2 (rutile) shows 6:3 coordination. The solid having rutile like structure among the following is

1. KCl

2. SnO2

3. ZnS

4. none of these

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