SOLID STATE OBJECTIVE PAPERFOR NEET,AIIMS ,IITJEE 2019 2020

solid state question bank, solid state questions

Q1. The ability of a substances to assume two or more crystalline structures is called                (a)Isomerism (b) Polymorphism (c)Isomorphism (d) Amorphism

Q2. Most crystals show good cleavage because their atoms, ions or molecules are                                 (a)Weakly bonded together (b)Strongly bonded together (c)Supherically symmertrical (d)Arranged in planes

Q3. The number of atoms contained in a fcc unit cell of a monoatomic substance is

(a)1 (b) 2

(c)4 (d) 6

Q4. In graphite electrons are

(a)Localized on each carbon atom

(b)Spread out between the sheets

(c)Localized on every third carbon atom

(d)Present in antibonding orbital

Q5. In the fluorine structure, the coordination number of Ca2+ ion is

(a)4 (b)6

(c)8 (d)3

Q6. On doping Ge metal with a little of In or Ga, one gets

(a)P-type semi conductor

(b)N-type semi conductor

(c)Insulator

(d)Rectifier

Q7. A solid with high electrical and thermal conductivity from the following is

(a)Si (b) Li

(c) NaCl (d) Ice

Q8. Ionic solids, with schottky defects, contain in their structure

(a)Cation vacancies only

(b)Cation vacancies and interstitial cations

(c)Equal number of cation and anion vacancies

(d)Anion vacancies and interstitial anions

Q9. When electrons are trapped into the crystal in anion vacancy, the defect is known as

(a)Schottky defect

(b) Frenkel defect

(c) Stoichiometric defect

(d) F-centres

Q10. The number of atoms in 100 g of a fcc crystal with density d= 10g/cm3 and cell edge equal to 100 pm, is equal to

(a)2 x1025 (b) 1 x 1025

(c)4 x 1025 (d) 3 x 1025

Q11. The fcc crystal contains how many atoms in each unit cell?

(a)6 (b) 8

(c) 4 (d) 5

Q12. The high density of water compared to ice is due to

(a)Dipole-induced dipole interaction

(b)Induced dipole induced dipole interaction

(c)Hydrogen bonding interactions

(d)Dipole-dipole interactions

Q13. In crystals of which one of the following ionic compounds would you except maximum distance between centres of cations and anions?

(a)CsI (b) CsF

(c) LiF (d) LiI

Q14. Cation and anion combines in a crystal to from following type of compound

(a)Ionic (b) Metallic                                                                                   c) Covalent (d)Dipole-dipole

Q15. In face-centred cubic lattice, a unit cell is shared equally by how many unit cells?

(a)2 (b) 4

(c) 6 (d) 8

Q16. The appearance of colour in solid alkali metal halides is generally due to

(a)Schottky defect

(b) Frenkel defect

(c)Interstitial positions

(d) F- centres

Q17. With which one of the following elements silicon should be doped so as to give p-type of

semiconductor?

(a)Germanium (b) Arsenic

(c)Selenium (d) Boron

Q18. Among the following which one

has the highest cation to anion

size ratio?

(a)NaF (b) CsI

(c)CsF (d) LiF

Q19. A solid compound XY has NaCl

structure. If the radius of the

cation is 100 pm, the radius of the

anion (Y-) will be

(a)275.1 pm (b) 322.5pm

(c)241.5 pm (d) 165.7 pm

Q20. The number of octahedral

void(s) per atom present in a cubic

close-packed structure is

(a)1 (b) 3

(c)2 (d) 4

Q21. The number of carbon atoms

per unit cell of diamond unit cell

is

(a)8 (b) 6

(c)1 (d) 4

Q22. The vacant space in bcc

lattice cell is

(a)26% (b) 48%

(b)23% (d) 32%

Q23. The correct statement

regarding defects in crystalline

solid is

(a)Schottky defects have no effect

on the density of crystalline

solids

(b)Frenkel defects decrease the

density of crystalline solids

(c)Frenkel defect is a dislocation

defect

(d)Frenkel defect is found in

halides of alkaline metals

Q24. In calcium fluoride,having the

fluorite structure, the

coordination numbers for calcium

ion (Ca2+) and fluoride ion (F-) are

(a)8 and 4 (b) 4 and 8

(c)4 and 2 (d) 6 and 6

Q25. The pure crystalline

substance on being heated

gradually first forms a turbid

liquid at constant temperature and

still at a higher disappears . The

behavior is a characteristic of

substance forming

(a)Allotropic crystals

(b)Liquid crystals

(c)Isomeric crystals

(d)Isomorphous crystals

Q26. An element (atomic mass = 100

g/mol) having bcc structure has

unit cell edge 400 pm. The density

of element is

(a)7.289g/cm3 (b) 2.144 g/cm3

(c)10.376 g/cm3 (d)5.188 g/cm3

Q27. The intermetallic compound

LiAg crystallizes in a cubic lattice

in which both lithium and silver

atoms have coordination number of

eight. To what crystal class does

the unit cell belong?

(a)Simple cubic (b) Face-centred

cubic

(c)Body- centred cubic (d) None

28. Schottky defect in crystals is

observed when

(a)An ion leaves its normal site

and occupies an interstitial site

(b)Unequal number of cations and

anions are missing from the

lattice

(c)Density of the crystal is

increased

(d)Equal number of cations and

anions are missing from the

lattice

Q29. In cube of any crystal A-atom

placed at every corners and Batom

placed at every centre of

face. The formula of compound is

(a)AB (b) A6B

(c)AB6 (d) A8B4

Q30. When molten Zinc is converted

into solid state, it acquires HCP

structure. The number of nearest

neighbours will be

(a)6 (b) 12

(c)8 (d) 4

Q31. 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

centres. The formula of the

compound is

(a)XY3 (b) X3Y

(c)XY (d) XY2

Q32. If NaCl is doped with 10-4 mol%

of SrCl2, the concentration of

cation vacancies will be(NA=6.02

X1023 mol-1)

(a)6.02 x1016mol-1 (b)6.02 x1017mol-1

(c)6.02 x1014 mol-1 (d) 6.02x 1015 mol-

1

Q33. Lithium metal crystallizes 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 the lithium will

be

(a)151.8 pm (b) 75.5 pm

(c)300.5 pm (d) 240.8 pm

Q34. Copper crystallizes in facecentred

cubic lattice with a unit

cell length of 361 pm. What is the

radius of copper atom is pm?

(a)157 (b) 181

(c)108 (d) 128

Q35. AB crystallizes in a body

centred cubic lattice with length

‘a’ equal to 387 pm. The distance

between two oppositely charged

ions in the lattice is:

(a)355pm (b) 250pm

(c)200pm (d) 300 pm

Q36. A metal crystallizes with a

face-centred cubic lattice. The

edge length of the unit cell is 408

pm. The diameter of the metal atom

is

(a)288 pm (b) 408 pm

(c)144 pm (d)204 pm

Q37. Lithium has a bcc structure.

Its density is 530 kg m-3 and its

atomic mass is 6.94 g mol-1 .

Calculate the edge length of a unit

cell of Lithium metal.(NA =6.02 x1023

mol-1)

(a)154 pm (b) 352 pm

(c)527 pm (d)264pm

Q38. The ionic radii of A+ and B-

ions are 0.98 x10-16 m and 1.81 x10-10

m. The coordination number of

each ion in AB is

(a)6 (b) 4

(c)8 (d) 2

Q39 Which is the incorrect

statement?

(a)Density decreases in case of

crystals with Schottky’s defect

(b)NaCl (s) is insulator, silicon is

semiconductor, silver is

conductor, quartz is piezo electric

crystal.

(c)Frenkel defect is favoured in

those ionic compounds in which

sizes of cation and anions are

almost equal.

(d)FeO0.98 has no stoichiometric

metal deficiency defect.

Q40. The edge of length of a Face

centred unit cubic cell is 508 pm.

If the radius of the cation is

100pm, the radius of the anion is

(a)288 pm (b) 398 pm

(c)154 pm (d)618 pm

Q41. The pyknometric density of

sodium chloride crystal is 2.165

x103kg m-3 while its X-ray density

is 2.178 x103 Kg m-3. The fraction of

unoccupied sites in sodium

chloride crystal is

(a)5.96 x10-3 (b) 5.96

(c)5.96x10-2 (d) 5.96x10-1

Q42. Which of the following

statements is not correct?

(a)The number of carbon atom in a

unit cell of diamond is 4

(b)The number of Bravais lattices

in which a crystal can be

categorized is 14

(c)The fraction of the total volume

occupied by the atoms in a

primitive cell is 0.48

(d)Molecular solids are generally

volatile

Q43. Structure of a mixed oxide is

cubic close –packed (c.c.p). 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 occupied

by a monovalent metal B. the

formula of the oxide is

(a)ABO2 (b) A2BO2

(c)A2B3O4 (d) AB2O2

Q44.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 Avogardo’ constant = 6.02

x1023 mol-1)

(a)30g mol-1 (b)27g mol-1

(c)20 g mol-1 (d) 40 g mol-1

Q45.Glass is

(a)Supercool liquid

(b)Crystaline

(c)Amorphus solid

(d)Soild – gas mixture

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ANSWER SOLID STATE AIPMT /NEET

Q1 (b) Q2(d) Q3(c)

Q4(b) Q5(c) Q6(a)

Q7(b) Q8(c) Q9(d)

Q10(c) Q 11(c) Q12(c)

Q13(a) Q14(a) Q15(c)

Q16(d) Q17(d) Q18(c)

Q19(c) Q20(a) Q21(a)

Q22(d) Q23(c) Q24(a)

Q25(b) Q26(b) Q27(c)

Q28(d) Q29(a) Q30(b)

Q31(a) Q32(b) Q33(a)

Q34(d) Q35(a) Q36(a)

Q37(b) Q38(a) Q39(c)

Q40(c) Q 41(a) Q42(c)

Q43(d) Q44(b) Q45(a)

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