Embibe Experts Solutions for Chapter: Solid State, Exercise 1: AP EAPCET - 20 Aug 2021 Afternoon

A metal crystallizes with a $\mathrm{FCC}$-lattice, the edge of whose unit cell is $\mathrm{xpm}$. The diameter of this metal atom would be $\mathrm{p} \mathrm{m} .$

The $\mathrm{FCC}-$crystal contains how many atoms in each unit cell?

The fraction of voids occupied in the inverse spinel compounds are

In the face centered unit cell, the lattice points are present at

The correct statement among the following, regarding defects in solids is
$1$) Frenkel defect is favored by small difference in the sizes of cation and anion.
$2$) Frenkel defect is a metal excess defect.
$3$) Trapping of electron in the lattice leads to formation of F-centres.
$4$) Schottky defect has no effect on the physical property of solids.

Find the non-semiconductor element among the following.

A compound is formed from elements $\mathrm{X}$ and $\mathrm{Y}$. The atoms of $\mathrm{Y}$ (anions) form a $\mathrm{ccp}$ lattice. The atoms of $\mathrm{X}$ (cations) occupy half of the octahedral voids and half of tetrahedral voids. What is the formula of the compound?

A metal crystallizes in two phases, one as $\mathrm{fcc}$ and another as $\mathrm{bcc}$ with unit cell edge lengths of $3.5\stackrel{°}{ \mathrm{A}}$ and $3.0\stackrel{°}{ \mathrm{A}}$, respectively. The ratio of density of $\mathrm{fcc}$ and $\mathrm{bcc}$ phases approximately is