Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 1 - Solid State>TOPICWISE QUESTIONS>Q 84

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The density of solid argon $(Ar = 40 g {mol}^{- 1})$ is $1.68 g {mL}^{- 1}$ at $40 K$ . If the argon atom is assumed to be a sphere of radius $1.50 \times 10^{- 8} cm$ , what $%$ of solid $Ar$ is apparently empty space?

$(Use : N_{A} = 6 \times 10^{23})$

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Important Questions on Solid State

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IMPORTANT

Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 1 - Solid State>TOPICWISE QUESTIONS>Q 85

A body-centred cubic lattice is made up of hollow spheres of

B

. Spheres of solid

A

are present in hollow spheres of

B

. The radius of

A

is half the radius of

B

. What is the ratio of the total volume of spheres of

B

unoccupied by

A

in a unit cell and volume of the unit cell?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 1 - Solid State>TOPICWISE QUESTIONS>Q 86

A crystal is made of particles

X, Y and Z

.

X

forms FCC packing

Y

occupies all the octahedral voids of

X

and

Z

occupies all the tetrahedral voids of

X

. If all the particles along one body diagonal are removed then the formula of the crystal would be-

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 1 - Solid State>TOPICWISE QUESTIONS>Q 87

The composition of a sample of Wustite is

{Fe}_{0.93} O

. What is the percentage of iron present as

{Fe}^{3 +}

in total iron?

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Practice Book for MHT-CET Chemistry (Physical Chemistry 2)>Chapter 1 - Solid State>TOPICWISE QUESTIONS>Q 88

A certain sample of cuprous sulphide is found to have composition

{Cu}_{1.8} S,

because of incorporation of

{Cu}^{2 +}

ions in the lattice. What is the mole

%

of

{Cu}^{2 +}

in total copper content in this crystal?