1
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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?

A
$\mathrm{AB}_2 \mathrm{O}_4$
B
$\mathrm{ABO}_3$
C
$\mathrm{ABO}_2$
D
$\mathrm{A}_2 \mathrm{BO}_4$
2
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Which one of the following is used as piezoelectric material?
A
Tridymite
B
Quartz
C
Zelolite
D
Mica
3
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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.

A
3,3
B
2,4
C
1,4
D
4,2
4
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

(a) $8.89 \times 10^{-8}$
A
$8.89 \times 10^{-9}$
B
$8.89 \times 10^{-1}$
C
$1.54 \times 10^{-8}$
D
1.54
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