1
TG EAPCET 2024 (Online) 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
In bcc lattice containing $X$ and $Y$ type of atoms, $X$ type of atoms are present at the corners and $Y$ type of atoms are present at the centers. In its unit cell, if three atoms are missing in the corners, the formula of the compound is
A
$X_{5} Y_{8}$
B
$X_{8} Y_{5}$
C
$X_{3} Y_{5}$
D
$X_{5} Y_{3}$
2
TG EAPCET 2024 (Online) 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The molecular formula of a crystal is $A B_{2} \mathrm{O}_{4}$. Oxygen atoms form ccp lattice. Atoms of $A$ occupy $x \%$ of tetrahedral voids and atoms of $B$ occupy $y \%$ of octahedral voids. $x$ and $y$ are respectively
A
$12.5 \%, 50 \%$
B
$50 \%, 12.5 \%$
C
$33.3 \%, 66.6 \%$
D
$66.6 \%, 33.3 \%$
3
TG EAPCET 2024 (Online) 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
An element with molar mass $2.7 \times 10^{-2} \mathrm{~kg} \mathrm{~mol}^{-1}$ forms a cubic unit cell with edge length of 405 pm . If its density is $2.7 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}$, the number of atoms present in one unit cell of it is (Given; $N_A=6.023 \times 10^{23} \mathrm{~mol}^{-1}$ )
A
2
B
4
C
6
D
12
4
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Identify the correct statement about the crystal defects in solids.
A
Frenkel defect is favoured when the difference between sizes of cation and anion is very small.
B
Frenkel defect is not a dislocation effect.
C
Schotthy defects have no effect on physical properties of solids.
D
Trapping of electrons in lattice leads to the formation of F-centres.
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