1
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
126.356 u
B
63.178 u
C
31.589 u
D
47.383 u
2
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is correct for fcc lattice?

A
There are equal number of octahedral and tetrahedral voids in a unit cell.
B
The tetrahedral voids are present at the edge centers.
C
Octahedral voids are present at the body center and edge centers.
D
Its packing efficiency (PE) is higher than hcp lattice PE.
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Match List I with List II.

List - I
(Defects)
List - II
(Examples)
(A) Frenkel defects (I) FeO
(B) Schottkey defects (II) NaCl
(C) Vacancy defects (III) AgCl
(D) Metal deficiency defects (IV) Crystals with vacant lattice sites.

A
A - IV, B - III, C - II, D - I
B
A - III, B - II, C - IV, D - I
C
A - I, B - II, C - III, D - IV
D
A - II, B - III, C - IV, D - I
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following solids is not a molecular solid?

A
HCl
B
$$\mathrm{H}_2 \mathrm{O}$$
C
$$\mathrm{CCl}_4$$
D
$$\mathrm{SiO}_2$$
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