In which of the following pairs the cations occupy same type of site

1. Zinc blende, Na₂O

2. NaCl, CsCl

3. Na₂O, CaF₂ 

4. CsBr, ZnS

The structure of TlCl is similar to CsCl. What should be the radius ratio in TlCl?

1. 0.225-0.414

2. 0.155-0.225

3. 0.732-1.000

4. 0.414-0.732

If molar mass of AB is 95 g mol^-1 and a is edge length, then the density of crystal structure is

1. $\frac{4\times 95}{{\mathrm{a}}^3\times {\mathrm{N}}_{\mathrm{A}}}$

2. $\frac{4{\mathrm{N}}_{\mathrm{A}}}{{\mathrm{a}}^3\times 95}$

3. $\frac{2\times 95}{{\mathrm{a}}^3\times {\mathrm{N}}_{\mathrm{A}}}$

4. $\frac{2{\mathrm{N}}_{\mathrm{A}}}{{\mathrm{a}}^3\times 95}$

The radius ratio (r⁺/r^-) of KF is 0.98. The structure of KF is similar to

1. NaCl

2. CsCl

3. ZnS

4. Both 1 and 2

Na₂O has antifluorite structure. In Na₂O, the coordination number of ${\mathrm{N}}^{{\mathrm{a}}^{+}}$ and ${\mathrm{O}}^{2^{-}}$ are respectively

1. 4,4

2. 6,6

3. 4,8

4. 8,8

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

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

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 

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 

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