CBSE Class 12th Chemistry Chapter1 The Solid State -Part15

Class XII Chemistry Chapter 1 The Solid State NCERT Solution is given below.

Question 1.8:
Ionic solids conduct electricity in molten state but not in solid state. Explain.
Answer
In ionic compounds, electricity is conducted by ions. In solid state, ions are held together by strong electrostatic forces and are not free to move about within the solid. Hence, ionic solids do not conduct electricity in solid state. However, in molten state or in solution form, the ions are free to move and can conduct electricity.

Question 1.9:
What type of solids are electrical conductors, malleable and ductile?
Answer
Metallic solids are electrical conductors, malleable, and ductile.

Question 1.10:
Give the significance of a ‘lattice point’.
Answer
The significance of a lattice point is that each lattice point represents one constituent particle of a solid which may be an atom, a molecule (group of atom), or an ion.