Examples of Ionic Compounds

Q. $KCl$ has a rock salt lattice with edge length $=628pm$. Pick the incorrect option(s).

1. In an unit cell, number of effective KCl molecules are 6
2. Second nearest neighbours of $K^{+}$ are 12, their sign is negative, with a distance of 364 pm
3. Third nearest neighbours of $K^{+}$ are 8, their sign is negative, with a distance of 544 pm
4. Second nearest neighbours of $K^{+}$ are 12, their sign is positive, with a distance of 444 pm

Q.

NaCI is an example of

1. Covalent solid

2. Ionic solid

3. Molecular solid

4. Metallic solid

Q. The number of equidistant oppositely charged ions in a sodium chloride crystal is

[MP PET 2001]

1. 8

2. 6

3. 4

4. 2

Q.

Which of the following statements is not true about NaCl structure

[DCE 2001]

1. Cl^- ions has coordination number 6

2. Each unit cell contains 4 NaClmolecules
3. Cl^- ions are in fcc arrangement

4. Na⁺ ions has coordination number 4

Q.

An example of fluorite structure is

1. 
   

2. NaF

3. 
   

4. 
   

Q.

What type of lattice is found in potassium chloride crystal

[MP PMT 1996]

1. Face centred cubic

2. Body centred cubic

3. Simple cubic

4. Simple tetragonal

Q.

The unit cell of a NaCl lattice

1. Has 4NaCl units

2. Is electrically charged

3. Hasions

4. Is body centered cube

Q.

In CsCl structure, the coordination number of Cs⁺ is

[MP PMT 2001]

1. Equal to that of Cl^- , that is 6

2. Equal to that of Cl^-, that is 8

3. Not equal to that of Cl^-, that is 8

4. Not equal to that of Cl^-, that is 6

Q.

In which of the following crystals alternate tetrahedral voids are occupied?

[IIT 2005]

1. 
   

2. 
   

3. NaCl

4. ZnS

Q.

Value of heat of fusion of NaCI is

1. Not very low and not very high

2. None of the above

3. Very low

4. Very high