1
TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
At $T(\mathrm{~K})$, copper (atomic mass $=63.5 \mathrm{u}$ ) has fce structure with an edge length of $x \AA$. The density of copper (in $\mathrm{g} \mathrm{cm}^{-3}$ ) at that temperature approximately is $\left(N_A=6.0 \times 10^{23} \mathrm{~mol}^{-1}\right)$
A
$\frac{423}{x}$
B
$\frac{4.23}{x^3}$
C
$\frac{423}{x^3}$
D
$\frac{212.5}{x^3}$
2
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A solid has a structure in which ' W ' atoms are located at the corners of a cubic lattice, oxygen atoms at the edge centre and

Na atom at the body centre. The formula of the compound is

A

$\mathrm{NaWO}_2$

B

$\mathrm{Na}_2 \mathrm{WO}_3$

C

$\mathrm{NaWO}_3$

D

$\mathrm{NaWO}_4$

3
TS EAMCET 2022 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

KBr has rock salt type structural arrangements and has a density of

$3.70 \mathrm{~g} / \mathrm{cm}^3$. The edge length of the unit cell is approximately [molecular weight of $\mathrm{KBr}=120 \mathrm{~g} / \mathrm{mol}$ ]

A

$3 \times 10^{-8} \mathrm{~cm}$

B

$12 \times 10^{-8} \mathrm{~cm}$

C

$9 \times 10^{-8} \mathrm{~cm}$

D

$6 \times 10^{-8} \mathrm{~cm}$

4
TS EAMCET 2022 (Online) 19th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the length of the body diagonal of a FCC unit cell is $x \mathop {\rm{A}}\limits^{\rm{o}}$, the distance between two octahedral voids in the cell in $\mathop {\rm{A}}\limits^{\rm{o}}$ is

A

$\frac{x}{\sqrt{2}}$

B

$\frac{x}{\sqrt{3}}$

C

$\frac{x}{\sqrt{6}}$

D

$\frac{x}{\sqrt{8}}$

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