Classification of Crystalline Solids

Which of the following solid is hard and brittle ?

Explain the classification of crystalline solid.

Which of the following solids is not a molecular solid?

The number of network solids and ionic solids in the list given below is respectively

${\mathrm{H}}_2\mathrm{O}\left(\mathrm{ice}\right), \mathrm{AlN}, \mathrm{Cu}, {\mathrm{CaF}}_2 ,\mathrm{diamond}, \mathrm{MgO}, {\mathrm{CCl}}_{4,} \mathrm{ZnS}, \mathrm{Ag}, \mathrm{NaCl}, {\mathrm{SiO}}_2$

Which is network solid from following?

Which one of the following is a covalent compound?

What is the effect of pressure on $\mathrm{NaCl}$ crystal?

Based on the nature of intermolecular forces, classify the following solids:

Sodium sulphate, Hydrogen

Based on the nature of intermolecular forces, classify the following solids:

Benzene, Silver

Based on the nature of intermolecular forces, classify the following solids:

Silicon carbide, Argon.

Classify the following solids on bonding considerations:

${\mathrm{CO}}_2,\mathrm{MgO},\mathrm{Al},{\mathrm{H}}_2,\mathrm{Si},\mathrm{Gd},\mathrm{Pb},\mathrm{AgCl}$

On the basis of nature of bonding, how can the solids be classified into different types?

The force operating between non-polar molecules like $\mathrm{He}, {\mathrm{H}}_2, {\mathrm{CH}}_4$ etc. when present as crystalline solids are called London _____ forces (a type of van der Waals forces).

What is the arrangement of atoms in the lattice structure of diamond and give contribution of each $\mathrm{C}$ atom?

Diamond and solid rhombic sulphur both are covalent solids but the latter has very low melting point than the former. Explain why.

Ions of $\mathrm{NaF}$ and $\mathrm{MgO}$ all have the same number of electrons and internuclear distances are about the same ($235 \mathrm{pm}$ and $215 \mathrm{pm}$). Why then are the melting points of $\mathrm{NaF} (992°\mathrm{C})$ and $\mathrm{MgO} (2642°\mathrm{C})$ are so different?

Which is not the correct statement for ionic solids in which positive and negative ions are held by strong electostatic attractive forces?

What type of interactions holds the molecules together in a polar molecular solid?

Write a feature which will distinguish a metallic solid from an ionic solid.

Which one of the following is a molecular crystal?