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Solid State · Chemistry · NEET
MCQ (Single Correct Answer)
1
How many number of tetrahedral voids are formed in $$5 \mathrm{~mol}$$ of a compound having cubic close packed structure? (Choose the correct option)
NEET 2023 Manipur
2
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)
NEET 2023 Manipur
3
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
NEET 2023
4
What fraction of one edge centred octahedral void lies in one unit cell of fcc?
NEET 2023
5
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 :
NEET 2022 Phase 2
6
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In a particular point defect, an ionic solid is electrically neutral, even if few of its cations are missing from its unit cells.
Reason (R) : In an ionic solid, Frankel defect arises due to dislocation of cation from its lattice site to interstitial site, maintaining overall electrical neutrality.
In the light of the above statements, choose the most appropriate answer from the options given below :
NEET 2022 Phase 1
7
Choose the correct statement:
NEET 2022 Phase 1
8
Copper crystallises in fcc unit cell with cell edge length of 3.608 $$\times$$ 10$$-$$8 cm. The density of copper is 8.92 g cm$$-$$3. Calculate the atomic mass of copper.
NEET 2022 Phase 1
9
The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :
NEET 2021
10
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
NEET 2021
11
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is :
NEET 2020 Phase 1
12
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and
the cations occupy 75% of octahedral voids. The formula of the compound is :
NEET 2019
13
Iron exhibits bcc structure at room temperature.
Above 900°C, it transforms to fcc structure. The
ratio of density of iron at room temperature to
that at 900°C (assuming molar mass and atomic
radii of iron remains constant with temperature)
is
NEET 2018
14
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca2+) and fluoride ion (F$$-$$) are
NEET 2016 Phase 2
15
The ionic radii of A+ and B$$-$$ ions are 0.98 $$ \times $$ 10$$-$$10 m and 1.81 $$ \times $$ 10$$-$$10 m. The coordination number of each ion in AB is
NEET 2016 Phase 1
16
Lithium has a bcc structure. Its density is 530 kg m$$-$$3 and its atomic mass is 6.94 g mol$$-$$. Calculate the edge length of a unit cell of lithium metal. (NA = 6.02 $$ \times $$ 1023 mol$$-$$1)
NEET 2016 Phase 1
17
The correct statement regarding defects in crystalline solids is
AIPMT 2015
18
The vacant space in bcc lattice unit cell is
AIPMT 2015
19
A given metal crystallises out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, what is the radius of one atom?
AIPMT 2015 Cancelled Paper
20
If $$a$$ is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be
AIPMT 2014
21
A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm$$-$$3. The molar mass of the metal is
(NA Avogadro's constant = 6.02 $$ \times $$ 1023 mol$$-$$1)
(NA Avogadro's constant = 6.02 $$ \times $$ 1023 mol$$-$$1)
NEET 2013
22
The number of carbon atoms per unit cell of diamond unit cell is
NEET 2013
23
Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are cooupied by a monovalent metal B. The formula of the oxide is
AIPMT 2012 Mains
24
A metal crystallises with a face-centred cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is
AIPMT 2012 Prelims
25
The number of octahedral void(s) per atom present in a cubic close-packed structure is
AIPMT 2012 Prelims
26
A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion (Y$$-$$) will be
AIPMT 2011 Mains
27
AB crystallizes in a body centered cubic lattice with edge length '$$a$$' equal to 387 pm. The distance between two oppositely charged ions in the lattice is
AIPMT 2010 Prelims
28
Lithium metal crystallises in a body-centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of lithium will be
AIPMT 2009
29
Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?
AIPMT 2009
30
With which one of the following elements silicon should be doped so as to give p-type of semiconductor?
AIPMT 2008
31
If $$a$$ stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively
AIPMT 2008
32
Which of the following statements is not correct?
AIPMT 2008
33
Percentage of free space in a body centred cubic unit cell is
AIPMT 2008
34
If NaCl is doped with 10$$-$$4 mol% of SrCl2, the concentration of cation vacancies will be (NA = 6.02 $$ \times $$ 1023 mol$$-$$1)
AIPMT 2007
35
The fraction of total volume occupied by the atoms present in a simple cube is
AIPMT 2007
36
CsBr crystallises in a body centered cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 $$ \times $$ 1023 mol$$-$$1, the density of CsBr is
AIPMT 2006
37
The appearance of colour in solid alkali metal halides is generally due to
AIPMT 2006
38
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?
AIPMT 2005
39
A compound formed by elements X and Y
crystallizes in a cubic structure in which the X
atoms are at the corners of a cube and the Y
atoms are at the face-centers. The formula of the
compound is :-
AIPMT 2004
40
The pyknometric density of sodium chloride crystal is 2.165 $$ \times $$ 103 kg m$$-$$3 while its X-ray density is 2.178 $$ \times $$ 103 kg m$$-$$3. The fraction of unoccupied sites in sodium chloride crystal is
AIPMT 2003
41
When Zn converts from melted state to its solid state, it has hcp structure, then find the number of nearest atoms.
AIPMT 2001
42
Cation and anion combines in a crystal to form following type of compound
AIPMT 2000
43
In cube of any crystal A-atom placed at every corners and B-atom placed at every centre of face. The formula of compound is
AIPMT 2000