Solid State Practice Test — Class 12 Chemistry

12th Standard Chemistry — Solid State: Online Practice Test

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Graphite and diamond are

A.covalent and molecular crystals B.ionic and covalent crystals C.both are covalent network crystals D.ionic and molecular crystals

Anisotropy is exhibited by

A.Glass B.Barium chloride C.Wood D.Paper

The ratio of number of close packed atoms to tetrahedral holes in a cubic close packing is

A.1:1 B.1:2 C.2:1 D.1:4

Solid \(CO_2\) is an example of

A.Covalent solid B.metallic solid C.molecular solid D.ionic solid

Assertion : monoclinic sulphur is an example of monoclinic crystal system Reason: for a monoclinic system, \(a \neq b \neq c\) and \(\alpha = \gamma = 90^{\circ}\), \(\beta \neq 90^{\circ}\)

A.Both assertion and reason are true and reason is the correct explanation of assertion. B.Both assertion and reason are true but reason is not the correct explanation of assertion. C.Assertion is true but reason is false. D.Both assertion and reason are false.

In calcium fluoride, having the fluorite structure the coordination number of \(Ca^{2+}\) ion and \(F^{-}\) Ion are

A.4 and 2 B.6 and 6 C.8 and 4 D.4 and 8

The number of unit cells in 8 gm of an element X ( atomic mass 40) which crystallizes in bcc pattern is (\(N_A\) is the Avogadro number)

A.\(6.023 \times 10^{23}\) B.\(6.023 \times 10^{22}\) C.\(60.23 \times 10^{23}\) D.\(6.023 \times 10^{23} \times \left( \frac{8}{40} \right)\)

In a solid atom M occupies ccp lattice and \(\frac{1}{3}\) of tetrahedral voids are occupied by atom N. find the formula of solid formed by M and N.

A.MN B.\(M_3N\) C.\(MN_3\) D.\(M_3N_2\)

The ionic radii of \(A^{+}\) and \(B^{-}\) are \(0.98 \times 10^{-10}\) m and \(1.81 \times 10^{-10}\) m. the coordination number of each ion in AB is

A.8 B.2 C.6 D.4

Q10

CsCl has bcc arrangement, its unit cell edge length is 400pm, its inter atomic distance is

A.400pm B.800pm C.\(\sqrt{3} \times 100\) pm D.\(\left( \frac{\sqrt{3}}{2} \right) \times 400\) pm

Q11

A solid compound XY has NaCl structure. if the radius of the cation is 100pm, the radius of the anion will be

A.\(\frac{100}{0.414}\) B.\(\frac{0.732}{100}\) C.\(100 \times 0.414\) D.\(\frac{0.414}{100}\)

Q12

The vacant space in bcc lattice unit cell is

A.48% B.23% C.32% D.26%

Q13

The radius of an atom is 300pm, if it crystallizes in a face centered cubic lattice, the length of the edge of the unit cell is

A.488.5pm B.848.5pm C.884.5pm D.484.5pm

Q14

The fraction of total volume occupied by the atoms in a simple cubic is

A.\(\frac{\pi}{4\sqrt{2}}\) B.\(\frac{\pi}{6}\) C.\(\frac{\pi}{4}\) D.\(\frac{\pi}{3\sqrt{2}}\)

Q15

The yellow colour in NaCl crystal is due to

A.excitation of electrons in F centers B.reflection of light from Cl- ion on the surface C.refraction of light from Na+ ion D.all of the above

Q16

If ‘a’ stands for the edge length of the cubic system; sc, bcc, and fcc. Then the ratio of radii of spheres in these systems will be respectively.

A.\(\frac{1}{2}a : \frac{\sqrt{3}}{2}a : \frac{\sqrt{2}}{2}a\) B.\(\frac{1}{2}a : \sqrt{3}a : \frac{1}{2}a\) C.\(\frac{1}{2}a : \frac{\sqrt{3}}{4}a : \frac{1}{2\sqrt{2}}a\) D.\(\frac{1}{2}a : \frac{\sqrt{3}}{2}a : \frac{1}{2}a\)

Q17

If ‘a’ is the length of the side of the cube, the distance between the body centered atom and one corner atom in the cube will be

A.\(\frac{2}{3}a\) B.\(\frac{4}{3}a\) C.\(\frac{\sqrt{3}}{4}a\) D.\(\frac{\sqrt{3}}{2}a\)

Q18

Potassium has a bcc structure with nearest neighbor distance 4.52 \(\text{\AA}\). its atomic weight is 39. its density will be

A.\(915 \text{ kg m}^{-3}\) B.\(2142 \text{ kg m}^{-3}\) C.\(452 \text{ kg m}^{-3}\) D.\(390 \text{ kg m}^{-3}\)

Q19

Schottky defect in a crystal is observed when

A.unequal number of anions and cations are missing from the lattice B.equal number of cations and anions are missing from the lattice C.an ion leaves its normal site and occupies an interstitial site D.no ion is missing from its lattice.

Q20

The cation leaves its normal position in the crystal and moves to some interstitial position, the defect in the crystal is known as

A.Schottky defect B.F center C.Frenkel defect D.non-stoichiometric defect

Q21

Assertion: due to Frenkel defect, density of the crystalline solid decreases. Reason: in Frenkel defect cation and anion leaves the crystal.

Q22

The crystal with a metal deficiency defect is

A.NaCl B.FeO C.ZnO D.KCl

Q23

Which of the following properties is not a general characteristic of the solid state of matter?

A.Definite volume and shape B.High incompressibility C.Strong cohesive forces D.High fluidity and diffusion

Q24

What distinguishes an amorphous solid from a crystalline solid?

A.Presence of a long-range orderly arrangement B.A sharp and definite melting point C.Short-range, random arrangement of constituents D.Anisotropic physical properties

Q25

Under which condition do ionic solids like sodium chloride conduct electricity?

A.In the solid state at room temperature B.When they are in molten state or dissolved in water C.When subjected to very high pressure D.Only when they are absolute zero temperature

Q26

Which type of crystalline solid is held together by a three-dimensional network of covalent bonds?

A.Molecular crystals B.Ionic crystals C.Covalent network crystals D.Metallic crystals

Q27

Solid carbon dioxide (dry ice) is classified as which type of molecular solid?

A.Non-polar molecular solid B.Polar molecular solid C.Hydrogen bonded molecular solid D.Metallic molecular solid

Q28

The characteristic lustre and high electrical conductivity of metals are primarily due to the presence of:

A.Strong ionic bonds B.Weak van der Waals forces C.Mobile electrons pervading the space D.Localized covalent sharing

Q29

Based on the crystal lattice systems, how many total possible Bravais lattices exist in three dimensions?

A.7 B.14 C.21 D.32

Q30

In a simple cubic unit cell, what is the coordination number of each atom?

A.4 B.6 C.8 D.12

Q31

What is the total number of atoms present per unit cell in a Body Centered Cubic (BCC) structure?

A.1 B.2 C.3 D.4

Q32

Which type of three-dimensional close packing is represented by the 'abcabc' repeating pattern?

A.Hexagonal close packing (hcp) B.Simple cubic packing (sc) C.Cubic close packing (ccp) D.Body centered cubic packing (bcc)

Q33

Which of the following metals is unique for crystallizing in a simple cubic pattern?

A.Sodium B.Iron C.Polonium D.Copper

Q34

How does the presence of a Schottky defect affect the density of a crystal?

A.It increases the density B.It decreases the density C.It has no effect on density D.It first increases then decreases density

Q35

Which statement correctly describes a Frenkel defect?

A.Equal numbers of cations and anions are missing B.An ion moves from its lattice site to an interstitial position C.Extra metal ions occupy the interstitial holes D.Impurity atoms replace the original lattice atoms

Q36

The change in colour of zinc oxide from colourless to yellow upon heating is an example of which defect?

A.Schottky defect B.Metal deficiency defect C.Metal excess defect D.Frenkel defect

Q37

F-centers in a crystal lattice are responsible for which physical property?

A.Increased mechanical strength B.Enhanced electrical insulation C.The appearance of colour in the crystal D.Perfect stoichiometric balance

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About this Solid State test

This free online practice test covers Solid State from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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