Dr. H.C. Srivastava and SUMEDHA SRIVASTAVA Solutions for Chapter: Solid State, Exercise 7: FILL IN THE BLANK TYPE QUESTIONS

Amorphous solids are regarded as _____ liquids.

The smallest three-dimensional groups of lattice points, which when repeated in three dimensions in space gives the whole lattice of the crystal, is called _____.

The unit cell in which one constituent particle is present at the centre in addition to the particles at its corners is called _____ unit cell.

The unit cell of a body-centred cubic system contains _____ atoms.

The number of nearest neighbours with which a given particle is in direct contact in a crystal is called the _____.

A cation would exactly fit into an octahedral void in the lattice formed by anions if $\left(\frac{{\mathrm{r}}_{+}}{{\mathrm{r}}_{-}}\right)$ is exactly equal to _____.

In the sodium chloride structure, each ${\mathrm{Na}}^{+}$ ion is surrounded by six ${\mathrm{Cl}}^{-}$ ions nearest neighbours and _____ ${\mathrm{Na}}^{+}$ ions next nearest neighbours.

If the radius ratio $\left(\frac{{\mathrm{r}}_{+}}{{\mathrm{r}}_{-}}\right)$ is in the range $0.414 -0.732$, the compound $\mathrm{AB}$ is likely to have _____ structure.