Solid State Test

Result

Solid State Test - 11

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Weekly Quiz Competition

Question 1
4 / -1

If ionic radius of Cs⁺ and Cs^- are 1.69 Å and 1.89 Å respectively, the edge length of unit cell is

A
4.04 Å

B
3.50 Å

C
7.00 Å

D
None of these

Solution
Question 2
4 / -1

The arrangement of X^- ions around A⁺ ion in solid AX is given in the figure (not drawn to scale). If the radius of X^- is 250 pm, the radius of A⁺ is

A
104 pm

B
125 pm

C
183 pm

D
57 pm

Solution
Question 3
4 / -1

The maximum proportion of available volume that can be filled by hard spheres in diamond is

A
0.52

B
0.34

C
0.32

D
0.68
Question 4
4 / -1

A solid metal has ccp or fcc structure. The relation of side of cube (a) and radius of atom (r) will be

A
a = 2r

B
a = 2√2 r

C
a = 4/√3 r

D
Question 5
4 / -1

For a crystal, the angle of diffraction (2 θ) is 90° and the second order line has a d value of 2.28Å . The wavelength (in Å ) of X-rays used for Bragg's diffraction is

A
1.612

B
2.00

C
2.28

D
4.00

Solution
Question 6
4 / -1

An ionic compound is expected to have tetrahedral structure if r₊ / r_- lies in the range of

A
0.414 to 0.732

B
0.225 to 0.414

C
0.155 to 0.225

D
0.732 to 1
Question 7
4 / -1

Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

A
157

B
181

C
108

D
128
Question 8
4 / -1

A metal crystallises in a bcc lattice. Its unit cell edge length is about 300 pm and its molar mass about 50 g mol^-1. What would be the density of the metal (in g cm^-3)?

A
3.1

B
6.2

C
9.3

D
12.4
Question 9
4 / -1

For AX ionic crystal to exist in bcc structure, the ratio of

A
between 0.41 and 0.73

B
greater than 0.73

C
less than 0.41

D
equal to 1.0
Question 10
4 / -1

Total volume of atoms present in a face centred cubic unit cell of a metal is (r = atomic radius)

A
20/3 πr³

B
24/3 πr³

C
12/3 πr³

D
16/3 πr³

Solution