Types of Unit Cell

Q. What is the coordination number in Body Centered Cubic (BCC) arrangement of identical particles?

Q.

$\text{Match the following}\text{Unit Cell}\text{Lattice points in unit cell}\left(1\right)\text{FCC}\text{(i) 8}\left(2\right)\text{BCC}\text{(ii) 9}\left(2\right)\text{Primitive}\text{(ii) 14}$

1. 1-(i), 2-(ii), 3-(iii)

2. 1-(iii), 2-(ii), 3-(i)

3. 1-(iii), 2-(i), 3-(ii)

4. 1-(i), 2-(iii), 3-(ii)

Q.

The above figure represents which type of unit cell?

1. BCC

2. FCC

3. Primitive

4. HCP

Q.

This is a unit cell

1. True

2. False

Q. Na and Mg crystallize in BCC and FCC type crystals respectively, then the number of atoms of Na and Mg present in the unit cell of their respective crystal is

1. 4 and 2
2. 9 and 14
3. 14 and 9
4. 2 and 4

Q. In a face centered cubic cell, an atom at the face contributes to the unit cell

1. 1/4 part
2. 1/2 part
3. 1/8 part
4. 1 part

Q. How many atoms are effectively present per unit cell in this hypothetical crystal lattice?

1. 4
2. 3/2
3. 7/2
4. 7

Q.

X

Y

Here X and Y represent:

1. BCC, FCC respectively

2. FCC, FCC respectively

3. FCC, primitive respectively

4. FCC, BCC respectively

Q.

Match the following:

1) i)FCC

2) ii) BCC

3) iii) Primitive

1. 1-(ii), 2-(iii), 3-(i)

2. 1-(ii), 2-(i), 3-(iii)

3. 1-(iii), 2-(ii), 3-(i)

4. 1-(iii), 2-(i), 3-(ii)

Q.

$N{H}_{4}Cl$ crystallizes in a body-centered cubic lattice with an edge length of unit cell equal to 387 pm. If the radius of the $C{l}^{-}$ ion is 181 pm, the radius for $N{H}_4^{+}$ ion is?

1. 154.1 pm

2. 366.3 pm

3. None of these

4. 92.6 pm