Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 28

MEDIUM

11th CBSE

IMPORTANT

Earn 100

Edge length of a cube is $400 pm$ , its body diagonal would be

50% studentsanswered this correctly

Important Questions on States of Matter: Solid State

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 29

If

' a'

stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of the radii of the spheres in these systems will be respectively.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 30

A metal has a fcc lattice. The edge length of the unit cell is

404

pm

. The density of the metal is

2.72 g {cm}^{- 3}

. The molar mass of the metal is (

N_{A}

, Avogadro's constant=

6.02 x 10^{23} {mol}^{- 1}

).

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 31

The number of atoms in

100

g

of a fcc crystal with density

= 10 g / {cm}^{3}

and cell edge equal to

200

pm

is equal to

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 32

Ice crystallises in a hexagonal lattice having a volume of the unit cell as

132 \times 10^{- 24}

{cm}^{3}

. If density of ice at the given temperature is

0.92

g {cm}^{- 3}

, then number of

H_{2} O

molecules per unit cell is

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 33

If the edge length of a

NaH

unit cell is

488

pm

, what is the length of

Na - H

bond if it crystallises in the

fcc

structure ?

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 34

Lithium has a

bcc

structure. Its density is

530

kg m^{- 3}

and its atomic mass is

6.94

g {mol}^{- 1}

. Calculate the edge length of the unit cell of lithium metal (

N_{A} = 6 \cdot 02 \times 10^{23}

{mol}^{- 1}

).

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 35

Iron exhibits

bcc

structure at room temperature, Above

900 ° C

, it transforms to

fcc

structure. The ratio of density of iron at room temperature to at that

900 ° C

(assuming molar mass and atomic radii of iron remain constant with temperature) is

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 36

The correct statement regarding defects in crystalline solids is