# Solid State and Colligative Properties Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

## Questions 1 of 50

Question:Space lattice of $$Ca{F_2}$$ is

Face centred cubic

Body centred cubic

Simple cubic

Hexagonal closed packing

## Questions 2 of 50

Question:For cubic coordination the value of radius ratio is

$$0.732 - 1.000$$

$$0.225 - 0.414$$

$$0.000 - 0.225$$

$$0.414 - 0.732$$

## Questions 3 of 50

Question:How many space lattices are obtainable from the different crystal systems

7

14

32

230

## Questions 4 of 50

Question:Example of unit cell with crystallographic dimensions $$a \ne b \ne c,\,\,\alpha = \gamma = {90^o},\,\,\beta \ne {90^o}$$ is

Calcite

Graphite

Rhombic sulphur

Monoclinic sulphur

## Questions 5 of 50

Question:In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells

8

4

2

6

## Questions 6 of 50

Question:Bravais lattices are of

8 types

12 types

14 types

9 types

## Questions 7 of 50

Question:The structure of $$TlCl$$ is similar to $$CsCl.$$ What would be the radius ratio in $$TlCl$$

$$0.155 - 0.225$$

$$0.225 - 0.414$$

$$0.414 - 0.732$$

$$0.732 - 1.000$$

## Questions 8 of 50

Question:Structure similar to zinc blende is found in

$$AgCl$$

$$NaCl$$

$$CuCl$$

$$TlCl$$

## Questions 9 of 50

Question:The structure of $$N{a_2}O$$ crystal is

$$CsCl$$ type

$$NaCl$$ type

$$ZnS$$ type

Antifluorite

## Questions 10 of 50

Question:Structure of $$ZnS$$ is

Body centred cubic

Face centred cubic

Simple cube

Fluorite structure

## Questions 11 of 50

Question:If the number of atoms per unit in a crystal is 2, the structure of crystal is

Octahedral

Body centred cubic bcc

Face centred cubic fcc

simple cubic

## Questions 12 of 50

Question:The intermetallic compound $$LiAg$$ crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is

Simple cube

Body-centred cube

Face-centred cube

None of these

## Questions 13 of 50

Question:The number of octahedral sites per sphere in a fcc structure is

8

4

2

1

## Questions 14 of 50

Question:Hexagonal close packed arrangement of ions is described as

ABC ABA

ABC ABC

ABABA

ABBAB

## Questions 15 of 50

Question:An example of a body cube is

Sodium

Magnesium

Zinc

Copper

## Questions 16 of 50

Question:Hexagonal close packing is found in crystal lattice of

$$Na$$

$$Mg$$

$$Al$$

None of these

## Questions 17 of 50

Question:Which ion has the largest radius from the following ions

$$N{a^ + }$$

$$M{g^{2 + }}$$

$$A{l^{3 + }}$$

$$S{i^{4 + }}$$

## Questions 18 of 50

Question:A solid has a structure in which $$'W'$$ atoms are located at the corners of a cubic lattice $$'O'$$ atoms at the centre of edges and $$'Na'$$ atoms at the centre of the cube. The formula for the compound is

$$NaW{O_2}$$

$$NaW{O_3}$$

$$N{a_2}W{O_3}$$

$$NaW{O_4}$$

## Questions 19 of 50

Question:Potassium crystallizes in a $$bcc$$ lattice, hence the coordination number of potassium in potassium metal is

0

4

6

8

## Questions 20 of 50

Question:Body centered cubic lattice has a coordination number of

4

8

12

6

## Questions 21 of 50

Question:The coordination number of a metal crystallizing in a hexagonal close packed structure is

4

12

8

6

## Questions 22 of 50

Question:The structure of $$MgO$$ is similar to $$NaCl.$$ What would be the coordination number of magnesium

2

4

6

8

## Questions 23 of 50

Question:How many chloride ions are there around sodium ion in sodium chloride crystal

3

8

4

6

## Questions 24 of 50

Question:Most crystals show good cleavage because their atoms, ions or molecules are

Weakly bonded together

Strongly bonded together

Spherically symmetrical

Arranged in planes

## Questions 25 of 50

Question:An example of a non-stoichiometric compound is

$$A{l_2}{O_3}$$

$$F{e_3}{O_4}$$

$$Ni{O_2}$$

$$PbO$$

## Questions 26 of 50

Question:The coordination number of a metal crystallizing in a hexagonal close packed chep structure is

12

8

4

6

## Questions 27 of 50

Question:Which of the following statement(s) is(are) correct

The coordination number of each type of ion in $$CsCl$$ crystal is 8

A metal that crystallizes in $$bcc$$ structure has a coordination number of 12

A unit cell of an ionic crystal shares some of its ions with other unit cells

The length of the unit cell in $$NaCl$$ is 552 $$pm$$ $$({r_{N{a^ + }}} = 95\,\,pm;\,\,\,{r_{C{l^ - }}} = 181\,\,pm)$$

1, 3, 4 are correct

## Questions 28 of 50

Question:The co-ordination number of $$N{a^ + }$$ in $$NaCl$$ is

6

8

4

1

## Questions 29 of 50

Question:In the calcium fluoride structure the co-ordination number of the cation and anions are respectively

6, 6

8, 4

4, 4

4, 8

## Questions 30 of 50

Question:Certain crystals produce electric signals on application of pressure. This phenomenon is called

Pyroelectricity

Ferroelectricity

Peizoelectricity

Ferrielectricity

## Questions 31 of 50

Question:Due to Frenkel defect, the density of ionic solids

Increases

Decreases

Does not change

Changes

## Questions 32 of 50

Question:Point defects are present in

Ionic solids

Molecular solids

Amorphous solids

Liquids

## Questions 33 of 50

Question:If a non-metal is added to the interstitial sites of a metal then the metal becomes

Softer

Less tensile

Less malleable

More ductile

## Questions 34 of 50

Question:In $$AgBr$$ crystal, the ion size lies in the order $$A{g^ + } < < B{r^ - }.$$ The $$AgBr$$ crystal should have the following characteristics

Defectless (perfect) crystal

Schottky defect only

Frenkel defect only

Both Schottky and Frenkel defects

## Questions 35 of 50

Question:The number of spheres contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is

In (i) 2 and in (ii) 4

In (i) 3 and in (ii) 2

In (i) 4 and in (ii) 2

In (i) 2 and in (ii) 3

## Questions 36 of 50

Question:$$CsBr$$ crystal has $$bcc$$ structure. It has an edge length of $$4.3{\mkern 1mu} \mathop A\limits^{\,\,\,\,0}$$. The shortest interionic distance between $$C{s^ + }$$ and $$B{r^ - }$$ions is

$$1.86{\mkern 1mu} \mathop A\limits^{\,\,\,\,0}$$

$$3.72{\mkern 1mu} \mathop A\limits^{\,\,\,\,0}$$

$$4.3{\mkern 1mu} \mathop A\limits^{\,\,\,\,0}$$

$$7.44{\mkern 1mu} \mathop A\limits^{\,\,\,\,0}$$

## Questions 37 of 50

Question:In octahedral holes (voids)

A simple triangular void surrounded by four spheres

A bi-triangular void surrounded by four spheres

A bi-triangular void surrounded by six spheres

A bi-triangular void surrounded by eight spheres

## Questions 38 of 50

Question:Bragg's law is given by the equation

$$n\lambda = 2\theta \sin \theta$$

$$n\lambda = 2d\sin \theta$$

$$2n\lambda = d\sin \theta$$

$$n\frac{\theta }{2} = \frac{d}{2}\sin \theta$$

## Questions 39 of 50

Question:The number of atoms/molecules contained in one body centered cubic unit cell is

1

2

4

6

## Questions 40 of 50

Question:It the distance between $$N{a^ + }$$ and $$C{l^ - }$$ ions in sodium chloride crystal is $$X$$pm, the length of the edge of the unit cell is

4X pm

X/4 pm

X/2 pm

2X pm

## Questions 41 of 50

Question:The edge of unit cell of FCC $$Xe$$ crystal is $$620\,pm$$. The radius of $$Xe$$ atom is

219.25 Pm

235.16 Pm

189.37 Pm

209.87 Pm

## Questions 42 of 50

Question:In orthorhombic, the value of $$a,\,b$$ and $$c$$ are respectively $$4.2{\mkern 1mu} \mathop A\limits^{\,\,\,\,0} ,8.6\mathop A\limits^{\,\,\,\,0}$$ and $$8.3{\mkern 1mu} \mathop A\limits^{\,\,\,\,0}$$. given the molecular mass of the solute is $$155\,gm\,mo{l^{ - 1}}$$ and that of density is $$3.3\,gm/cc$$, the number of formula units per unit cell is

2

3

4

6

## Questions 43 of 50

Question:A crystalline solid

Changes abruptly from solid to liquid when heated

Has no definite melting point

Undergoes deformation of its geometry easily

Has an irregular 3-dimensional arrangements

Softens slowly

## Questions 44 of 50

Question:Diamond is an example of

Solid with hydrogen bonding

Electrovalent solid

Covalent solid

Glass

## Questions 45 of 50

Question:The solid $$NaCl$$ is a bad conductor of electricity since

In solid $$NaCl$$ there are no ions

Solid $$NaCl$$ is covalent

In solid $$NaCl$$ there is no velocity of ions

In solid $$NaCl$$ there are no electrons

## Questions 46 of 50

Question:The existence of a substance in more than one solid modifications is known as or Any compound having more than two crystal structures is called

Polymorphism

Isomorphism

Allotropy

Enantiomorphism

## Questions 47 of 50

Question:Which one of the following metal oxides is antiferromagnetic in nature

$$Mn{O_2}$$

$$Ti{O_2}$$

$$V{O_2}$$

$$Cr{O_2}$$

## Questions 48 of 50

Question:In graphite, carbon atoms are joined together due to

Ionic bonding

Vander Waal’s forces

Metallic bonding

Covalent bonding

## Questions 49 of 50

Question:Which of the following is not correct for ionic crystals

They possess high melting point and boiling point

All are electrolyte

Exhibit the property of isomorphism

Exhibit directional properties of the bond

## Questions 50 of 50

Question:Which of the following is a molecular crystal

$$SiC$$
$$NaCl$$