Solid State · Chemistry · AP EAPCET

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 formula of solid?

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 number of molecular solids and network solids in the above list is respectively.

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 $1.54 \mathring{A}$ ) $\left(\sin 30^{\circ}=0.5, \sin 60^{\circ}=0.866 ; n=1\right)$

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? $$\left(N=6.022 \times 10^{23} \mathrm{~mol}^{-1}\right)$$

Which of the following statement is correct for fcc lattice?

Match List I with List II.

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. $$\mathrm{H}_2 \mathrm{O}$$ (ice), $$\mathrm{AlN}, \mathrm{Cu}, \mathrm{CaF}_2$$, diamond, MgO , $$\mathrm{CCl}_4, \mathrm{ZnS}, \mathrm{Ag}, \mathrm{NaCl}, \mathrm{SiO}_2$$

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

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

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

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