iCON Education - Solid State AP-EAPCET Test

Candidate Name

Student

Exam Name

AP-EAPCET

Test Name

Solid State

Subject

Chemistry

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Remaining Time

00:30:00

Question 1: Palette 1/30

AP-EAPCET 2025 MCQ

A metal crystallises in simple cubic lattice. The radius of the metal atom is $x \mathrm{pm}$. What is the volume of unit cell in $\mathrm{pm}^3$ ?

$x^3$

$4 x^3$

$8 x^3$

$16 x^3$

Question 2: Palette 2/30

AP-EAPCET 2025 MCQ

Identify the incorrect statement is regarding the interstitial compounds.

They have high melting points.

They lose electrical conductivity during the formation from metal.

They are chemically inert.

They are very hard.

Question 3: Palette 3/30

AP-EAPCET 2025 MCQ

The crystal system with edge lengths $a \neq b \neq c$ and axial angles $\alpha=\beta=\gamma=90^{\circ}$ is ' $x$ ' and number of Bravais lattices for it is ' $y$ '. $x$ and $y$ are

cubic : 3

monoclinic : 2

orthorhombic : 4

trigonal : 2

Question 4: Palette 4/30

AP-EAPCET 2025 MCQ

A metal crystallises in simple cubic lattice. The volume of one unit cell is $6.4 \times 10^7 \mathrm{pm}^3$. What is the radius of the metal atom in pm ?

100

200

300

400

Question 5: Palette 5/30

AP-EAPCET 2025 MCQ

An element occurs in the body centred cubic structure with edge length of 288 pm . The density of the element is $7.2 \mathrm{~g} \mathrm{~cm}^{-3}$. The number of atoms present in 208 g of the element is nearly

$242 \times 10^{23}$

$12.1 \times 10^{23}$

$242 \times 10^{24}$

$36.3 \times 10^{23}$

Question 6: Palette 6/30

AP-EAPCET 2025 MCQ

If AgCl is doped with $1 \times 10^{-4}$ mole percent of $\mathrm{CdCl}_2$ the number of cation vacancies (in $\mathrm{mol}^{-1}$ ) is

$6.023 \times 10^{19}$

$6.023 \times 10^{21}$

$6.023 \times 10^{17}$

$6.023 \times 10^{23}$

Question 7: Palette 7/30

AP-EAPCET 2025 MCQ

An element (atomic weight $=250 \mathrm{u}$ ) crystallises in a simple cubic lattice. If the density of the unit cell is $7.2 \mathrm{~g} \mathrm{~cm}^{-3}$. What is the radius (in $\mathop {\rm{A}}\limits^{\rm{o}}$ ) of the atom of the element?

$ \left(N_A=6.02 \times 10^{23} \mathrm{~mol}^{-1}\right) $

4.04

2.93

1.93

3.04

Question 8: Palette 8/30

AP-EAPCET 2025 MCQ

A compound is formed by two elements $A$ and $B$. Atoms of the element $B$ (as anion) make ccp lattice and those of element $A$ (as cation) occupy all tetrahedral voids. The formula of the compound is

$A_4 B_3$

$A B$

$A B_2$

$A_2 B$

Question 9: Palette 9/30

AP-EAPCET 2025 MCQ

An element crystallises in bcc lattice. The atomic radius of the element is $2.598 \mathop {\rm{A}}\limits^{\rm{o}}$. What is the volume (in $\mathrm{cm}^3$ ) of one unit cell?

$6.4 \times 10^{-22}$

$2.16 \times 10^{22}$

$2.16 \times 10^{-22}$

$2.16 \times 10^{-24}$

Question 10: Palette 10/30

AP-EAPCET 2025 MCQ

Gold crystallises in fcc lattice. The edge length of the unit cell is $4 \mathop {\rm{A}}\limits^{\rm{o}}$. The closest distance between gold atoms is ' $x$ ' $\mathop {\rm{A}}\limits^{\rm{o}}$ and density of gold is ' $y$ ' $\mathrm{g} \mathrm{cm}^{-3}$. What are $x$ and $y$ respectively?

(Molar mass of gold $=197 \mathrm{~g} \mathrm{~mol}^{-1} ; N=6 \times 10^{23} \mathrm{~mol}^{-1}$ )

$\sqrt{2}, 41.04$

$2 \sqrt{2}, 20.52$

$2 \sqrt{3}, 10.25$

$\sqrt{3}, 5.15$

Question 11: Palette 11/30

AP-EAPCET 2024 MCQ

The molecular formula of a cystalline solid $X_3 Y_2$. Atoms of $Y$ form ccp lattice and atoms of $X$ occupy $50 \%$ octachedral voids and $X \%$ of tetrahedral voids. What is the percentage of unoccupied tetrahedral voids?

66.6

33.3

Question 12: Palette 12/30

AP-EAPCET 2024 MCQ

A compound is formed by atoms of $A, B$ and $C$. Atoms of $C$ form hcp lattice. Atoms of $A$ occupy $50 \%$ of octahedral voids and atoms of $B$ occupy $2 / 3$ rd of tetrahedral voids. What is the molecular formula of the solid?

$A_3 B_8 C_6$

$A_2 B_8 C_6$

$A B_4 C_3$

$A_5 B_8 C_6$

Question 13: Palette 13/30

AP-EAPCET 2024 MCQ

Zinc oxide (white) is heated to high temperature for some time. Observe the following statements regarding above process. I. Zinc oxide colour changes to pale yellow II. The type of defect formed is 'metal deficiency' III. Some $\mathrm{Zn}^{2-}$ and $\mathrm{e}^{-}$are present in interstitial place The correct statements are

I, II only

I, III, only

II, III only

I,II and III

Question 14: Palette 14/30

AP-EAPCET 2024 MCQ

Identify the incorrect set from the following.

$\mathrm{SiO}_2$, covalent solid, insulator, high melting point

MgO , covalent solid, insulator, high melting point

$\mathrm{H}_2 \mathrm{O}_{\text {(ice) }}$, molecular solid, insulator, low melting point.

$\mathrm{Ag}(\mathrm{s})$, metallic solid, conductor, high melting point.

Question 15: Palette 15/30

AP-EAPCET 2024 MCQ

What are the variables in the graph of powder diffraction pattern of a crystalline solid?

$X$-axis $=2 \theta: Y$-axis $=$ intensity

$X$-axis $=$ intensity : $Y$-axis $=2 \theta$

$X$-axis $=\theta: Y$-axis $=$ intensity

$X$-axis $=$ intensity : $Y$-axis $=\theta$

Question 16: Palette 16/30

AP-EAPCET 2024 MCQ

The density of $\beta-\mathrm{Fe}$ is $7.6 \mathrm{~g} \mathrm{~cm}^{-3}$. It crystallises in cubic lattice with $\mathrm{a}=290 \mathrm{pm}$. What is the value of $Z$ ? $\left(\mathrm{Fe}=56 \mathrm{~g} \mathrm{~mol}^{-1}: N_{\mathrm{A}}=6.022 \times 10^{23} \mathrm{~mol}^{-1}\right)$

Question 17: Palette 17/30

AP-EAPCET 2024 MCQ

A solid compound is formed by atoms of $A$ (cations), $B$ (cations) and O (anions). Atoms of O form hcp lattice. Atoms of $A$ occupy $25 \%$ of tetrahedral holes and atoms of $B$ occupy $50 \%$ octahedral holes. What is the molecular formula of solid?

$\mathrm{AB}_2 \mathrm{O}_4$

$\mathrm{ABO}_3$

$\mathrm{ABO}_2$

$\mathrm{A}_2 \mathrm{BO}_4$

Question 18: Palette 18/30

AP-EAPCET 2024 MCQ

Which one of the following is used as piezoelectric material?

Tridymite

Quartz

Zelolite

Mica

Question 19: Palette 19/30

AP-EAPCET 2024 MCQ

Some substances are given below

$ \begin{aligned} & \mathrm{Ag}, \mathrm{CO}_2(s), \mathrm{SiO}_2, \mathrm{ZnS} \\ & \mathrm{SO}_2(s), \mathrm{AlN}, \mathrm{HCl}(\mathrm{~s}), \mathrm{H}_2 \mathrm{O}(\mathrm{~s}) \end{aligned} $

The number of molecular solids and network solids in the above list is respectively.

3,3

2,4

1,4

4,2

Question 20: Palette 20/30

AP-EAPCET 2024 MCQ

The diffraction pattern of crystalline solid gave a peak at $20=60^{\circ}$. What is the distance ( in cm ) between the layers which gave this peak?

( $\lambda$ of $X$-rays is $1.54 \mathring{A}$ ) $\left(\sin 30^{\circ}=0.5, \sin 60^{\circ}=0.866 ; n=1\right)$

(a) $8.89 \times 10^{-8}$

$8.89 \times 10^{-9}$

$8.89 \times 10^{-1}$

$1.54 \times 10^{-8}$

1.54

Question 21: Palette 21/30

AP-EAPCET 2022 MCQ

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

126.356 u

63.178 u

31.589 u

47.383 u

Question 22: Palette 22/30

AP-EAPCET 2022 MCQ

Which of the following statement is correct for fcc lattice?

There are equal number of octahedral and tetrahedral voids in a unit cell.

The tetrahedral voids are present at the edge centers.

Octahedral voids are present at the body center and edge centers.

Its packing efficiency (PE) is higher than hcp lattice PE.

Question 23: Palette 23/30

AP-EAPCET 2022 MCQ

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 - IV, B - III, C - II, D - I

A - III, B - II, C - IV, D - I

A - I, B - II, C - III, D - IV

A - II, B - III, C - IV, D - I

Question 24: Palette 24/30

AP-EAPCET 2022 MCQ

Which of the following solids is not a molecular solid?

HCl

$\mathrm{H}_2 \mathrm{O}$

$\mathrm{CCl}_4$

$\mathrm{SiO}_2$

Question 25: Palette 25/30

AP-EAPCET 2022 MCQ

The number of network solids and ionic solids in the list given below is respectively. $\mathrm{H}_2 \mathrm{O}$ (ice), $\mathrm{AlN}, \mathrm{Cu}, \mathrm{CaF}_2$, diamond, MgO , $\mathrm{CCl}_4, \mathrm{ZnS}, \mathrm{Ag}, \mathrm{NaCl}, \mathrm{SiO}_2$

3, 3

3, 4

4, 4

4, 3

Question 26: Palette 26/30

AP-EAPCET 2022 MCQ

If molten NaCl contains $\mathrm{SrCl}_2$ as impurity, crystallisation can generate

anionic vacancies

cationic vacancies

metal excess defects

metal deficiency defects

Question 27: Palette 27/30

AP-EAPCET 2022 MCQ

Photographic plates are prepared by coating emulsion of which of the following in gelatin?

AgBr

CuBr

$\mathrm{Zn} \mathrm{B}_2$

$\mathrm{FeBr}_2$

Question 28: Palette 28/30

AP-EAPCET 2021 MCQ

A metal crystallises with a fcc lattice, the edge of whose unit cell is $x \mathrm{~pm}$. The diameter of this metal atom would be .............. pm.

$2 x$

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

$x \sqrt{2}$

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

Question 29: Palette 29/30

AP-EAPCET 2021 MCQ

In the face centered unit cell, the lattice points are present at

only the corners of the unit cell

the corners and the center of the unit cell

the corners and the face centres of the unit cell

only the face centres of the unit cell

Question 30: Palette 30/30

AP-EAPCET 2021 MCQ

The fcc crystal contains how many atoms in each unit cell?

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