Solid State Test

Result

Solid State Test - 9

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Weekly Quiz Competition

Question 1
4 / -1

The pyknometric density of sodium chloride crystal is 2.165 × 10³ kg m^–3 while its X-ray density is 2.178 × 10³ kg m^–3. The fraction of unoccupied sites in sodium chloride crystal is

A
5.96 × 10^–3

B
5.96

C
5.96 × 10^–2

D
5.96 × 10^–1
Question 2
4 / -1

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
Question 3
4 / -1

What will be the percentage of free space in bcc lattice ?

A
32

B
68

C
72

D
no free space

Solution
Question 4
4 / -1

A solid has a structure in which, atoms of W, O and Na are located respectively at the corners, centre of edge and at the centre of the cubic lattice. The compound is

A
NaWO₂

B
NaWO₃

C
Na₂ WO₃

D
NaWO₄

Solution
Question 5
4 / -1

In the solid state, MgO has the same structure as that of sodium chloride. The number of oxygens surrounding each magnesium in MgO is

A
6

B
1

C
2

D
4
Question 6
4 / -1

A

B

C

D
Question 7
4 / -1

Which set of characteristics of ZnS crystal is correct?

A
Coordination number (4 : 4), ccp, Zn²⁺ ion in the alternate tetrahedral voids

B
Coordination number (6 : 6), hcp, Zn²⁺ ion in all tetrahedral voids

C
Coordination number (6 : 4), hcp, Zn²⁺ ion in all octahedral voids

D
Coordination number (4 : 4), ccp, Zn²⁺ ion in all tetrahedral voids
Question 8
4 / -1

Arrangement of sulphide ions in zinc blende is

A
sc

B
hcp

C
bcc

D
fcc
Question 9
4 / -1

Which of the following statements about the interstitial compounds is incorrect ?

A
They are chemically reactive.

B
They are much harder then the pure metal.

C
They have higher melting points than the pure metal.

D
They retain metallic conductivity.
Question 10
4 / -1

How many number of atoms are there in a cube based unit cell having one atom on each corner and two atoms on each body diagonal of cube

A
8

B
6

C
4

D
9