Solid State PYQs - Last 5 Years

Which of the following crystals has the unit cell such that $a=b \neq c$ and $\alpha=\beta=90^{\circ}$, $\gamma=120^{\circ}$ ?

The number of atoms in 4.5 g of a face-centred cubic crystal with edge length 300 pm is
(Given : Density $=10 \mathrm{~g} \mathrm{~cm}^{-3}$ and $N_A=6.022 \times 10^{23}$)

In solid state, \(\mathrm{PCl}_5\) is a/an

A metal crystallises in a body centred cubic lattice with the metallic radius \(\sqrt3\mathop A\limits^o\). The volume of the unit cell in \(\mathrm{m}^3\) is

Match the column A (type of crystalline solid) with the column B (example for each type)

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If '\(a\)' stands for the edge length of the cubic systems. The ratio of radii in simple cubic, body centred cubic and face centred cubic unit cells is

Alkali halides do not show dislocation defect because

Which of the following is not true about the amorphous solids?

How many number of atoms are there in a cube based unit cell, having one atom on each corner and 2 atoms on each body diagonal of cube?

Vacant space in body centered cubic lattice unit cell is about

In chrysoberyl, a compound containing beryllium, aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy \(\frac{1}{4}\)th of octahedral voids. The formula of the compound is

A metal crystallises in bcc lattice with unit cell edge length of \(300 \mathrm{~pm}\) and density \(615 \mathrm{~g~cm}^{-3}\). The molar mass of the metal is

The correct statement regarding defects in solid is

A metal crystallises in face centred cubic structure with metallic radius \(\sqrt{2} \mathop A\limits^o\). The volume of the unit cell (in \(\mathrm{m}^3\) ) is

Silicon doped with gallium forms