Chemistry 12: Chapter –1 Exemplar Solutions-State Solid State Part 6

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IV. Matching Type

Note : In the following questions match the items given in Column I with the items given in Column II. In some questions more than one item of Column I and Column II may match.

Question 64:

Match the defects given in Column I with the statements in given Column II.

Match the Defects Columan 1 and 2
Match the Defects Columan 1 and 2

Column I

Column II

(i)

Simple vacancy defect

(a)

Shown by non-ionic solids and increases density of the solid.

(ii)

Simple interstitial defect

(b)

Shown by ionic solids and decreases density of the solid.

(iii)

Frenkel defect

(c)

Shown by non-ionic solids and density of the solid decreases

(iv)

Schottky defect

(d)

Shown by ionic solids and density of the solid remains the same.

Answer:

(i) → (c) (ii) → (a) (iii) → (d) (iv) → (b)

Question 65:

Match the type of unit cell given in Column I with the features given in Column II.

Match the Type of Unit Cell
Match the type of unit cell

Column I

Column II

(i)

Primitive cubic unit cell

(a)

Each of the three perpendicular edges compulsorily have the different edge length i.e; .

(ii)

Body centred cubic unit cell

(b)

Number of atoms per unit cell is one.

(iii)

Face centred cubic unit cell

(c)

Each of the three perpendicular edges compulsorily have the same edge length i.e;

(iv)

End centred orthorhombic unit cell

(d)

In addition to the contribution from the corner atoms the number of atoms present in a unit cell is one.

In addition to the contribution from the corner atoms the number of atoms present in a unit cell is three.

Answer:

(i) → (b), (c) (ii) → (c), (d) (iii) → (c), (e) (iv) → (a), (d)

Question 66:

Match the types of defect given in Column I with the statement given in Column II.

Match the Column
Match the Column

Column I

Column II

(i)

Impurity defect

(a)

with anionic sites called F-centres

(ii)

Metal excess defect

(b)

with

(iii)

Metal deficiency defect

(c)

with and some cationic sites vacant

Answer:

(i) → (c) (ii) → (a) (iii) → (b)

Question 67:

Match the items given in Column I with the items given in Column II

Match the Items Column
Match the items Column

Column I

Column II

(i)

in solid state

(a)

p-Type semiconductor

(ii)

in molten state

(b)

n-Type semiconductor

(iii)

Silicon with phosphorus

(c)

Electrolytic conductors

(iv)

Germanium with boron

(d)

Electronic conductors

Answer:

(i) → (d) (ii) → (c) (iii) → (b) (iv) → (a)

Question 68:

Match the type of packing given in Column I with the items given in Column II.

Match the Type of Packing
Match the type of packing

Column I

Column II

(i)

Square close packing in two dimensions

(a)

Triangular voids

(ii)

Hexagonal close packing in two dimensions

(b)

Pattern of spheres is repeated in every fourth layer

(iii)

Hexagonal close packing in three dimensions

(c)

Coordination number 4

(iv)

Cubic close packing in three dimensions

(d)

Pattern of sphere is repeated in alternate layers

Answer:

(i) → (c) (ii) → (a) (iii) → (d) (iv) → (b)

Developed by: