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1
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

How are edge length '$$a$$' of the unit cell and radius '$$r$$' of the sphere related to each other in ccp structure? (Choose correct option for your answer)

A
$$a=2 r$$
B
$$a=r / 2 \sqrt{2}$$
C
$$\mathrm{a}=4 \mathrm{r} / \sqrt{3}$$
D
$$\mathrm{a}=2 \sqrt{2} \mathrm{r}$$
2
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

A compound is formed by two elements A and B. The elements B forms cubic close packed structure and atoms of A occupy $$1 / 3$$ of tetrahedral voids. If the formula of the compound is $$\mathrm{A}_{x} \mathrm{B}_{y}$$, then the value of $$x+y$$ is in option

A
4
B
3
C
2
D
5
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

What fraction of one edge centred octahedral void lies in one unit cell of fcc?

A
$$\frac{1}{3}$$
B
$$\frac{1}{4}$$
C
$$\frac{1}{12}$$
D
$$\frac{1}{2}$$
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

Match List-I with List-II :

List-I
(Defects)
List-II
(Shown by)
(a) Frenkel defect (i) Non-ionic solids and density of the solid decreases
(b) Schottky defect (ii) Non-ionic solids and density of the solid increases
(c) Vacancy defect (iii) Ionic solids and density of the solid decreases
(d) Interstitial defect (iv) Ionic solids and density of the solid remains constant

Choose the correct answer from the options given below :

A
(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
B
(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)
C
(a) - (i), (b) - (iii), (c) - (ii), (d) - (iv)
D
(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
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