The characteristic features of solids are

Which is not a property of solids

Quartz is a crystalline variety of 

Which of the following is a pseudo solid

Glass is

Which of the following is non-crystalline solid

Among solids the highest melting point is established by

Particles of quartz are packed by

Which of the following is an example of covalent crystal solid

Which of the following is an example of metallic crystal solid

Which of the following is an example of ionic crystal solid

Which solid will have the weakest inter-molecular forces

NaCl is an example of

Diamond is an example of

Amorphous substances show

(A) Short and long range order                     (B) Short range order
(C) Long range order                                          (D) Have no sharp M.P.

Amorphous solids are

A crystalline solid have

Crystalline solids are

A crystalline solid

Assertion (A) : Crystalline solids have short range order.

Reason (R) : Amorphous solids have long range order.

Wax is an example of

Which of the following is a molecular crystal

Which of the following does not represent a type of crystal system

Which of the following is not correct for ionic crystals

Crystals of covalent compounds always have

Solid CO₂ is an example of

Under which category iodine crystals are placed among the following

Among the following which crystal will be soft and have low melting point

A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behavior is A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behavior is 

A crystal plane intercepts the three crystallographic axes at a, 1/2 b and 3/2 c where a, b and c are the unit lengths along x, y and z respectively. The Miller indices of this plane will be

Which among the following will show anisotropy

The interparticle forces in solid hydrogen are 

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

In graphite, carbon atoms are joined together due to

Mostly crystals show good cleavage because their atoms, ions or molecules are    

A solid melts slightly above 273 K and is a poor conductor of heat and electricity. To which of the following categories does it belong.

The Miller indices of a plane having intercepts 2a, 2b, ∞ are

Example of unit cell with crystallographic dimensions   is  a ≠ b ≠ c,  α = γ = 90⁰ , β ≠ 90⁰  is

Rhombic sulphur has the following structure

Crystals can be classified into ……………basic crystal habits

The total number of lattice arrangements in different crystal systems is 

A match box exhibits

Tetragonal crystal system has the following unit cell dimensions 

(A) a = b = c and α = β =γ = 90⁰                                                        (B) a = b ≠ c and α = β = γ = 90⁰
(C) a ≠ b ≠ c and α = β= γ = 90⁰                                                        (D) a = b ≠ c and α = β = 90⁰, γ = 120⁰

Monoclinic crystal has dimensions

(A)  a ≠ b ≠ c , α = γ = 90⁰ , β ≠ 90⁰                                           (B)  a = b = c , α = β = γ = 90⁰
(C)  a = b ≠ c , α = β = γ = 90⁰                                                      (D)  a ≠ b ≠ c , α ≠ β ≠ γ ≠ 90⁰

Bravais lattices are of

In CsCl lattice the coordination number of Cs⁺ion is

What is the coordination number of sodium in Na₂0

The coordination number of a cation occupying a tetrahedral hole is

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

In hcp arrangement, the number of nearest neighbours are

Hexagonal close packed arrangement of ions is describes as     

If one atom is present in a unit cell, the crystalline compound is

What type of lattice is found in potassium chloride crystal

In zinc blende structure, zinc atoms fill up

The correct order of increasing radii of the ion Br^–, F^–, O^2- and S^2- is as follows

(A) Br^– < F^– < O^2- < S^2-                                                          (B) S^2- < O^2- < F^– < Br^–
(C) F^– < O^2- < S^2- < Br^–                                                          (D) F^– < Br^– < O^2- < S^2-

Which one of the following is the biggest ion

(A) Al⁺³                                   (B) Ba⁺²                               (C) Mg⁺²                                 (D) Na⁺

The number of formula unit in unit cell of  type is

In the rock salt structure, the number of formula units per unit cell is equal to

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

Which ion has the lowest radius

(A) Na⁺                               (B) Mg²⁺                              (C) Al³⁺                            (D) Si⁴⁺

The number of atoms or molecules contained in one body centered cubic unit cell is

Which ion has the largest radius from the following ions

(A) Na⁺                                (B) Mg²⁺                               (C) Al³⁺                             (D) Si⁴⁺

In CsCl lattice the coordination number of Cl^– ion is

In the fluorite structure, the coordination number Ca²⁺ of  ion is

Potassium crystallizes with a

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

If the structure of  is similar to  the coordination number of Cu would be

If the pressure on a  structure is increased, then its coordination number will

An example of a non-stoichiometric compound is

(A) Al₂O₃                              (B) Fe₃O₄                               (C) NiO₂                              (D) PbO

The number of equidistant oppositely charged ions in a sodium chloride crystal is

If the coordination number of Ca²⁺ in CaF₂ is  then the coordination number of F^– ion would be

The number of close neighbour in a body centred cubic  lattice of identical sphere is

In the closest packed structure of a metallic lattice, the number  of nearest  neighbours of  a metallic  atom is

In cubic closest packing (ccp) structure of NaCl. the coordination  number of Na⁺ ion is

How many chloride ions are there around sodium ion in sodium chloride crystal.

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

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

Space lattice of CaF₂  is

Hexagonal close packing  is found in crystal lattice of

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

In NaCl lattice  the coordination  number of Cl^–  ion is

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

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

The number of octahedral voids in a unit cell of a cubical closest packed  structure is

The number of octahedral  sites per sphere in  a  structure  is

An example of a body cube is

The vacant space in the bcc unit cell is

In  lattice, the neighbouring number of ions for any lattice point is

The arrangement ABC  ABC  ABC……. is referred  as

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

In octahedral holes (voids)

Body centered cubic lattice has a coordination number of

Which of the following statements is not true about structure

(A) ions  are in  arrangement                                        (B) ions  has coordination number 4
(C) ions  has coordination number 6                           (D) Each unit cell contains  molecules

In  a face centred cubic cell, an atom at the face contributes to the unit cell

The following structure drawn is of

For the structure given below the site marked as S is a

For a solid with the following structure, the co-ordination number of the point B is

The unit cell with the structure below refer to …………crystal system

The interionic distance for caesium chloride crystal will be 

(A)  a                           

(B)                                

(C)                                 

(D) 

The formula for determination of density of unit cell is

(A) 

(B)   

(C) 

(D) 

The number of atoms or molecules  contained in one primitive cubic unit cell is

If an atom is present in the centre of the cube, the participation  of that atom per unit cell is

If the radius ratio is in the range of 732  –  1, then the coordination number will be

Coordination number for  is

The number of atoms in a face- centred cubic unit cell are

The number of atoms or molecules contained in one face centred cubic unit cell of a monoatomic substance is

How many formula units are there in the unit cell of sodium chloride

The number of tetrahedral voids in  a unit cell of cubical closest packed structure is

Which of the following adopts normal spinal structure

(A) CsCl                               (B) MgAl₂O₄                               (C) FeO                                (D) CaF₂       

In zinc sulphide structure the coordination number of sulphide ion is

Which of the following contains zinc blend structure

An AB₂ type structure is found in

(A) NaCl                                 (B)  Al₂O₃                               (C) CaF₂                             (D)  N₂O

In solid CsCl each Cl is  closely  packed with how many

In zinc blend structure of the coordination number of  ion  is

Which one possess a antifluorite structure

(A) Na₂O                            (B) MgO                               (C) Fe₂O₃                              (D)  Al₂O₃

In which compound 4 : 4 coordination is found

Which of the following contains rock salt structure

(A) SrF₂                              (B) MgO                           (C) Al₂O₃                         (D) All of these

The unit cell of a lattice

(A) Is body centred cube                                                    (B) Has 3Na⁺  ions
(C) Has 4 NaCl units                                                            (D) Is electrically charged

Crystal structure of is

Structure similar to zinc blende is found in

In CsCl structure,  the coordination  number of Cs⁺ is 

(A)  Equal to that of Cl^– , that is 6                                           (B)  Equal to that of Cl^– , that is 8
(C)  Not equal to that of Cl^– , that is 6                                    (D)  Not equal to that of Cl^– , that is 8

The structure of Na₂O crystal is

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

(A)  The coordination number of each type of ion in CsCl crystal is 8
(B)  A metal that crystallizes in bcc structure has a coordination number  of 12
(C)  A unit cell of an ionic crystal shares some of its ions  with other unit cells.
(D)  The edge  length of the unit cell in NaCl  is 552 pm  ( r_Na⁺ = 95 pm;  r_Cl^– = 181 pm)

In the crystal of CsCl, the nearest neighbours of each  ion are

In which compound 8 : 8 coordination  is found

Structure of ZnS is

Which of the following statements is correct for

(A)  It is a covalent compound                                            (B)  It contains Cs³⁺ and Br^– ions
(C)  It contains Cs⁺ and Br^–₃                                                 (D)  It contains Cs⁺, Br^– and lattice Br₂ molecule

In which of the following substances the carbon atom is arranged in a regular tetrahedral structure

In a face centred cubic arrangement of A and B atoms when A atoms are at the corner of the unit cell and B atoms of the face centres. One of the A atom is missing from one corner in unit cell.  The simplest formula of compound is

(A) A₇B₃                               (B) AB₃                              (C)  A₇B₂₄                           (D)  A_7/8B₃

Bragg’s law is given by the equation

(A) nλ = 2θ sin θ                          (B) nλ = 2d sin θ                         (C) 2nλ = d sin θ                         (D)  

For an ionic crystal of the type AB, the value of (limiting) radius ratio is 0.40. The value suggests that the crystal structure should be

If the value of ionic radius ratio   is 0.52 in an ionic compound, the geometrical arrangement of ions in crystal is

Assertion (A) : In crystal lattice, the size of the cation is larger in a tetrahedral hole than in an octahedral hole

Reason (R) : The cations occupy more space than anions in crystal packing

If the radius ratio is in the range of 0.414 – 0.732, then the coordination number will be

The maximum radius of sphere that can be fitted in the tetrahedral hole of cubical closed packing of sphere of radius r

In NaCl lattice the radius ratio is

A solid A⁺B^– has the B^–  ions arranged as below. If the A⁺ ions occupy half of the octahedral sites in the structure. The formula of solid is 

(A) AB                          (B)  AB₂                             (C)  A₂B                        (D)  A₃B₄

For the structure of solid given below if the lattice points represent A⁺ ions and the B^– ions occupy all the tetrahedral voids then coordination number of A is

In A⁺B^– ionic compound, radii of  A⁺ and B^– ions are 180 pm  and 187 pm The crystal structure of this compound will be

An element occurring in the bcc structure has 12.08 × 10²³ unit cells. The total number of atoms of the element in these cells will be

(A)  24.16 × 10²³                             (B) 36.18 × 10²³                             (C) 6.04 × 10²³                            (D) 12.08 × 10²³ 

For an ionic crystal of the general formula AX and coordination number 6, the value of radius ratio will be

The number of unit cells in 58.5 g of NaCl is nearly

(A) 6 × 10²³                              (B) 3 × 10²³                          (C) 1.5 × 10²³                           (D) 0.5 × 10²³

If the radius ratio is in the range of 0.225 – 0.414, then the coordination number will be

An alloy of  Cu, Ag and Au is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centre and gold is present at body centre, the alloy has a formula

(A) Cu₄Ag₂Au                  (B) Cu₄Ag₄Au                       (C) Cu₄Ag₃Au                       (D) CuAgAu

For cubic coordination the value of radius ratio is

The edge length of the unit cell of NaCl crystal lattice is 552 pm. If ionic radius of sodium ion is 95 pm, what is the ionic radius of chloride ion

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

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

(A) 4 × 10²⁵                             (B) 3 × 10²⁵                          (C) 2 × 10²⁵                          (D) 1 × 10²⁵  

Potassium fluoride has NaCl type structure. What is the distance between K⁺ and F^– ions if cell edge is a cm

For some crystals, the radius ratio for cation and anion is 0.525. Its coordination number will be

CsBr crystal has bcc Structure. It has an edge length of 4.3 Å.  The shortest intertonic distance between Cs⁺  and Br^–  ions is

Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å.  Assuming  density of the oxide  as 4.0g-cm^-3 , then the number  of Fe²⁺  and O^2-  ions present in each unit cell will be 

(A) Four  Fe²⁺  and four O^2-                                          (B) Two  Fe²⁺  and four O^2-
(C) Four  Fe²⁺  and two O^2-                                           (D) Three Fe²⁺  and three O^2- 

The edge length of face centred unit cubic cell is 508 pm. If the radius  of the cation is 110 pm, the radius of the anion is

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

In a hexagonal close packed (hcp) structure  of spheres, the fraction  of the volume  occupied by the sphere  is A. In a cubic close packed structure, the fraction  is B. The relation for A and B is  

A metallic element crystallizes in simple cubic lattice. Each edge length of the unit cell is 3 Å. The density of the element is 8 g/cc. Number of unit cells in 108 g  of the metal is

(A) 1.33 × 10²⁰                         (B)  2.7 × 10²²                            (C) 5 × 10²³                           (D) 2 × 10²⁴

If the density of NaCl =  2.165 g cm^-3 and the distance between Na⁺  and Cl^–  = 281 pm, Avogadro’s  number is equal to

(A) 7 × 10²³  mol^-1                (B) 8 × 10²³  mol^-1               (C) 6 × 10²³  mol^-1                    (D) 4 × 10²³  mol^-1

A solid A⁺ B^–  has a body centred cubic structure. The distance of closest  approach between  the two ions is 0.767 Å. The edge length of the unit cell is

(A)    pm                                         (B)  142 = 2 pm
(C)    pm                                                          (D)  81.63 pm

A binary solid x⁺ Y^–  has a zinc blende structure with y^– ions forming the lattice and  x⁺  ion occupying 25% tetrahedral sites. The formula of the solid is

(A) xy                               (B) x₂y                                (C) xy₂                                            (D) xy₄

A metallic element has a cubic lattice. Each edge of the unit cell is 2 Å.  The density of the metal is 2.5 g cm^-3 . The unit cells in 200 g  of the metal are 

(A) 1× 10²⁵                           (B) 1 × 10²⁴                             (C) 1 × 10²²                     (D) 1× 10²⁰

A crystal lattice with alternate +ve and –ve ions has radius ratio of 0.524.  Its coordination number is

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 

(A) X₂Y                               (B) X₃Y                               (C) XY₂                                         (D) XY₄

In the laboratory, sodium chloride is made by burning the sodium in the atmosphere of chlorine which is yellow in colour. The cause of yellow colour is

(A) Presence of Na⁺ ions in the crystal lattice
(B) Presence of Cl^–  ions in the crystal lattice
(C) Presence of electron in the crystal lattice
(D) Presence of face centered cubic crystal lattice

In a solid AB  having the NaCl structure A atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

(A)  AB₂                                         (B)  A₂B                              (C)  A₄B₃                                      (D)  A₃B₄