Solid State and Colligative Properties Test 2

Total Questions:50 Total Time: 75 Min

Remaining:

Questions 1 of 50

Question:The maximum radius of sphere that can be fitted in the octahedral hole of cubical closed packing of sphere of radius $$r$$ is

0.732 $$r$$

0.414 $$r$$

0.225 $$r$$

0.155 $$r$$

Questions 2 of 50

Question:The unit cell of a $$NaCl$$ lattice

Is body centred cube

Has $$3N{a^ + }$$ions

Has $$4NaCl$$ units

Is electrically charged

Questions 3 of 50

Question:For tetrahedral coordination number, the radius ratio $$\frac{{{r_{{c^ + }}}}}{{{r_{{a^ - }}}}}$$ is

$$0.732 - 1.000$$

$$0.414 - 0.732$$

$$0.225 - 0.414$$

$$0.155 - 0.225$$

Questions 4 of 50

Question:What type of lattice is found in potassium chloride crystal

Face centred cubic

Body centred cubic

Simple cubic

Simple tetragonal

Questions 5 of 50

Question:The three dimensional graph of lattice points which sets the pattern for the whole lattice is called

Space lattice

Simple lattice

Unit cell

Crystal lattice

Questions 6 of 50

Question:The crystal system of a compound with unit cell dimensions $$a = 0.387$$, $$b = 0.387$$ and $$c = 0.504nm$$ and $$\alpha = \beta = {90^o}$$ and $$\gamma = {120^o}$$ is

Cubic

Hexagonal

Orthorhombic

Rhombohedral

Questions 7 of 50

Question:The number of tetrahedral voids in the unit cell of a face centered cubic lattice of similar atoms is

4

6

8

10

Questions 8 of 50

Question:An $$fcc$$ unit cell of aluminium contains the equivalent of how many atoms

1

2

3

4

Questions 9 of 50

Question:If ‘Z’ is the number of atoms in the unit cell that represents the closest packing sequence $$- - - A\;B\;C\;A\;B\;C - - \; - ,$$ the number of tetrahedral voids in the unit cell is equal to

Z

2 Z

Z/2

Z/4

Questions 10 of 50

Question:An example of fluorite structure is

$$NaF$$

$$Sr{F_2}$$

$$AlC{l_3}$$

$$Si{F_4}$$

Questions 11 of 50

Question:In which of the following crystals alternate tetrahedral voids are occupied?

NaCl

ZnS

$$Ca{F_{\rm{2}}}$$

$$N{a_{\rm{2}}}O$$

Questions 12 of 50

Question:Which of the following contains rock salt structure

$$Sr{F_2}$$

$$MgO$$

$$A{l_2}{O_3}$$

All

Questions 13 of 50

Question:In the fluorite structure, the coordination number of $$C{a^{2 + }}$$ ion is

4

6

8

3

Questions 14 of 50

Question:A compound is formed by elements $$A$$and $$B.$$ This crystallizes in the cubic structure when atoms $$A$$are the corners of the cube and atoms $$B$$ are at the centre of the body. The simplest formula of the compounds is

$$AB$$

$$A{B_2}$$

$${A_2}B$$

$$A{B_4}$$

Questions 15 of 50

Question:Coordination number for $$Cu$$ is

1

6

8

12

Questions 16 of 50

Question:In the crystal of $$CsCl,$$ the nearest neighbours of each $$Cs$$ ion are

Six chloride ions

Eight chloride ions

Six $$Cs$$ ions

Eight $$Cs$$ ions

Questions 17 of 50

Question:In a cubic structure of compound which is made from X and Y, where X atoms are at the corners of the cube and Y at the face centres of the cube. The molecular formula of the compound is

$${X_2}Y$$

$${X_3}Y$$

$$X{Y_2}$$

$$X{Y_3}$$

Questions 18 of 50

Question:If the radius ratio is in the range of $$0.731 - 1,$$ then the coordination number will be

2

4

6

8

Questions 19 of 50

Question:If the radius ratio is in the range of $$0.414 - 0.732,$$ then the coordination number will be

2

4

6

8

Questions 20 of 50

Question:What is the coordination number of sodium in $$N{a_2}O$$

6

4

8

2

Questions 21 of 50

Question:The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is

6

8

1

4

Questions 22 of 50

Question:Which defect causes decrease in the density of crystal

Frenkel

Schottky

Interstitial

$$F -$$centre

Questions 23 of 50

Question:The correct statement regarding $$F -$$centre is

Electron are held in the voids of crystals

$$F -$$centre produces colour to the crystals

Conductivity of the crystal increases due to $$F -$$centre

All

Questions 24 of 50

Question:Doping of silicon (Si) with boron leads to

$$n$$-type semiconductor

$$p$$-type semiconductor

Metal

Insulator

Questions 25 of 50

Question:If $$NaCl$$ is doped with $${10^{ - 3}}mol\;\% \,\,SrC{l_2},$$ then the concentration of cation vacancies will be

$$1 \times {10^{ - 3}}mol\%$$

$$2 \times {10^{ - 3}}mol\%$$

$$3 \times {10^{ - 3}}mol\%$$

$$4 \times {10^{ - 3}}mol\%$$

Questions 26 of 50

Question:Frenkel and Schottky defects are

Nucleus defects

Non-crystal defects

Crystal defects

None of these

Questions 27 of 50

Question:Which one of the following is the most correct statement

Brass is an interstitial alloy, while steel is a substitutional alloy

Brass is a substitutional alloy, while steel is an interstitial alloy

Brass and steel are both substitutional alloys

Brass and steel are both interstitial alloys

Questions 28 of 50

Question:The flame colours of metal ions are due to

Frenkel defect

Schottky defect

Metal deficiency defect

Metal excess defect

Questions 29 of 50

Question:Which one of the following crystals does not exhibit Frenkel defect

AgBr

AgCl

KBr

ZnS

Questions 30 of 50

Question:In a solid lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is

Interstitial defect

Valency defect

Frenkel defect

Schottky defect

Questions 31 of 50

Question:The number of atoms in $$100\,\,g$$ of an $$fcc$$ crystal with density $$d = 10\,\,g/c{m^3}$$ and cell edge equal to $$100\,\,pm,$$is equal to

$$4 \times {10^{25}}$$

$$3 \times {10^{25}}$$

$$2 \times {10^{25}}$$

$$1 \times {10^{25}}$$

Questions 32 of 50

Question:In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions

$$LiF$$

$$CsF$$

$$CsI$$

$$LiI$$

Questions 33 of 50

Question:The number of unit cells in $$58.5\,g$$ of $$NaCl$$ is nearly

$$6 \times {10^{20}}$$

$$3 \times {10^{22}}$$

$$1.5 \times {10^{23}}$$

$$0.5 \times {10^{24}}$$

Questions 34 of 50

Question:How many unit cells are present in a cube-shaped ideal crystal of $$NaCl$$ of mass $$1.00\,g$$ [Atomic masses: $$Na = 23,\,Cl = 35.5]$$

$$2.57 \times {10^{21}}$$ unit cells

$$5.14 \times {10^{21}}$$ unit cells

$$1.28 \times {10^{21}}$$ unit cells

$$1.71 \times {10^{21}}$$ unit cells

Questions 35 of 50

Question:In the Bragg’s equation for diffraction of X-rays, n represents for

Quantum number

An integer

Moles

Questions 36 of 50

Question:A metal has bcc structure and the edge length of its unit cell is $$3.04{\AA}$$. The volume of the unit cell in $$c{m^3}$$ will be

$$1.6 \times {10^{21}}c{m^3}$$

$$2.81 \times {10^{ - 23}}c{m^3}$$

$$6.02 \times {10^{ - 23}}c{m^3}$$

$$6.6 \times {10^{ - 24}}c{m^3}$$

Questions 37 of 50

Question:In face centred cubic unit cell edge length is

$$\frac{4}{{\sqrt 3 }}r$$

$$\frac{4}{{\sqrt 2 }}r$$

$$2r$$

$$\frac{{\sqrt 3 }}{2}r$$

Questions 38 of 50

Question:The three states of matter are solid, liquid and gas. Which of the following statement is/are true about them

Gases and liquids have viscosity as a common property

The molecules in all the three states possess random translational motion

Gases cannot be converted into solids without passing through the liquid phase

Solids and liquids have vapour pressure as a common property

Questions 39 of 50

Question:A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming

Isomeric crystals

Liquid crystals

Isomorphous crystals

Allotropic crystals

Questions 40 of 50

Question:Which of the following is ferroelectric compound

$$BaTi{O_3}$$

$${K_4}\,[Fe{(CN)_6}]$$

$$P{b_2}{O_3}$$

$$PbZr{O_3}$$

Questions 41 of 50

Question:Which is not a property of solids

Solids are always crystalline in nature

Solids have high density and low compressibility

The diffusion of solids is very slow

Solids have definite volume

Questions 42 of 50

Question:Which solid will have the weakest intermolecular forces

Ice

Phosphorus

Naphthalene

Sodium fluoride

Questions 43 of 50

Question:Dulong and Petit’s law is valid only for

Metals

Non-metals

Gaseous elements

Solid elements

Questions 44 of 50

Question:Which of the following is an example of metallic crystal solid

$$C$$

$$Si$$

$$W$$

$$AgCl$$

Questions 45 of 50

Question:Under which category iodine crystals are placed among the following

Ionic crystal

Metallic crystal

Molecular crystal

Covalent crystal

Questions 46 of 50

Question:Quartz is a crystalline variety of

Silica

Sodium silicate

Silicon carbide

Silicon

Questions 47 of 50

Question:Which type of solid crystals will conduct heat and electricity

Ionic

Covalent

Metallic

Molecular

Questions 48 of 50

Question:Which of the following is an example of covalent crystal solid

$$Si$$

$$NaF$$

$$Al$$

$$Ar$$

Questions 49 of 50

Question:Which of the following is an example of ionic crystal solid

Diamond

$$LiF$$

$$Li$$

Silicon

Questions 50 of 50

Question:Which one is an example of amorphous solid

Glass

Salt

Cesium chloride

Calcium fluoride