Solid State PYQs - Last 5 Years

The crystal system with edge lengths $a \neq b \neq c$ and axial angles $\alpha=\beta=\gamma=90^{\circ}$ is ' $x$ ' and number of Bravais lattices for it is ' $y$ '. $x$ and $y$ are

Identify the incorrect statement is regarding the interstitial compounds.

A metal crystallises in simple cubic lattice. The radius of the metal atom is $x \mathrm{pm}$. What is the volume of unit cell in $\mathrm{pm}^3$ ?

A metal crystallises in simple cubic lattice. The volume of one unit cell is $6.4 \times 10^7 \mathrm{pm}^3$. What is the radius of the metal atom in pm ?

An element occurs in the body centred cubic structure with edge length of 288 pm . The density of the element is $7.2 \mathrm{~g} \mathrm{~cm}^{-3}$. The number of atoms present in 208 g of the element is nearly

If AgCl is doped with $1 \times 10^{-4}$ mole percent of $\mathrm{CdCl}_2$ the number of cation vacancies (in $\mathrm{mol}^{-1}$ ) is

A compound is formed by two elements $A$ and $B$. Atoms of the element $B$ (as anion) make ccp lattice and those of element $A$ (as cation) occupy all tetrahedral voids. The formula of the compound is

An element (atomic weight $=250 \mathrm{u}$ ) crystallises in a simple cubic lattice. If the density of the unit cell is $7.2 \mathrm{~g} \mathrm{~cm}^{-3}$. What is the radius (in $\mathop {\rm{A}}\limits^{\rm{o}}$ ) of the atom of the ele...

An element crystallises in bcc lattice. The atomic radius of the element is $2.598 \mathop {\rm{A}}\limits^{\rm{o}}$. What is the volume (in $\mathrm{cm}^3$ ) of one unit cell?

Gold crystallises in fcc lattice. The edge length of the unit cell is $4 \mathop {\rm{A}}\limits^{\rm{o}}$. The closest distance between gold atoms is ' $x$ ' $\mathop {\rm{A}}\limits^{\rm{o}}$ and density of gold is ' $y$ ' $\mathrm{g} \ma...

The molecular formula of a cystalline solid $X_3 Y_2$. Atoms of $Y$ form ccp lattice and atoms of $X$ occupy $50 \%$ octachedral voids and $X \%$ of tetrahedral voids. What is the percentage of unoccupied tetrahedral voids?

Zinc oxide (white) is heated to high temperature for some time.
Observe the following statements regarding above process.
I. Zinc oxide colour changes to pale yellow
II. The type of defect formed is 'metal deficiency'
III. Some $\mathrm{Zn}...

A compound is formed by atoms of $A, B$ and $C$. Atoms of $C$ form hcp lattice. Atoms of $A$ occupy $50 \%$ of octahedral voids and atoms of $B$ occupy $2 / 3$ rd of tetrahedral voids. What is the molecular formula of the solid?

What are the variables in the graph of powder diffraction pattern of a crystalline solid?

Identify the incorrect set from the following.

A solid compound is formed by atoms of $A$ (cations), $B$ (cations) and O (anions). Atoms of O form hcp lattice. Atoms of $A$ occupy $25 \%$ of tetrahedral holes and atoms of $B$ occupy $50 \%$ octahedral holes. What is the molecular formul...

The density of $\beta-\mathrm{Fe}$ is $7.6 \mathrm{~g} \mathrm{~cm}^{-3}$. It crystallises in cubic lattice with $\mathrm{a}=290 \mathrm{pm}$. What is the value of $Z$ ? $\left(\mathrm{Fe}=56 \mathrm{~g} \mathrm{~mol}^{-1}: N_{\mathrm{A}}=6...

Which one of the following is used as piezoelectric material?

Some substances are given below
$$ \begin{aligned} & \mathrm{Ag}, \mathrm{CO}_2(s), \mathrm{SiO}_2, \mathrm{ZnS} \\ & \mathrm{SO}_2(s), \mathrm{AlN}, \mathrm{HCl}(\mathrm{~s}), \mathrm{H}_2 \mathrm{O}(\mathrm{~s}) \end{aligned} $$
The numbe...

The diffraction pattern of crystalline solid gave a peak at $20=60^{\circ}$. What is the distance ( in cm ) between the layers which gave this peak?( $\lambda$ of $X$-rays is $1.54 \mathring{A}$ ) $\left(\sin 30^{\circ}=0.5, \sin 60^{\circ}...

An example for network solid is

In $A_x B_y$ crystal structure, $A$ atoms occupied all
Octahedral as well as tetrahedral voids and $B$ atoms are at fcc centres. What is the formula of compound $A_x B_y$.

Which of the following statement is correct for fcc lattice?

An element crystallising in fcc lattice has a density of \(8.92 \mathrm{~g} \mathrm{~cm}^{-3}\) and edge length of \(3.61 \times 10^{-8} \mathrm{~cm}\). What is the atomic weight of element? $$\left(N=6.022 \times 10^{23} \mathrm{~mol}^{-1}...

The number of network solids and ionic solids in the list given below is respectively. \(\mathrm{H}_2 \mathrm{O}\) (ice), \(\mathrm{AlN}, \mathrm{Cu}, \mathrm{CaF}_2\), diamond, MgO , $$\mathrm{CCl}_4, \mathrm{ZnS}, \mathrm{Ag}, \mathrm{NaC...

Photographic plates are prepared by coating emulsion of which of the following in gelatin?

If molten NaCl contains \(\mathrm{SrCl}_2\) as impurity, crystallisation can generate

Match List I with List II.

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Which of the following solids is not a molecular solid?

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

A metal crystallises with a fcc lattice, the edge of whose unit cell is \(x \mathrm{~pm}\). The diameter of this metal atom would be .............. pm.

The fcc crystal contains how many atoms in
each unit cell?