1
WB JEE 2023
+1
-0.25

What is the edge length of the unit cell of a body centred cubic crystal of an element whose atomic radius is 75 pm?

A
170 pm
B
175 pm
C
178 pm
D
173.2 pm
2
WB JEE 2022
+1
-0.25

The number of atoms in body centred and face centred cubic unit cell respectively are

A
2 and 4
B
4 and 3
C
1 and 2
D
4 and 6
3
WB JEE 2021
+1
-0.25
An element crystallises in a body centered cubic lattice. The edge length of the unit cell is 200 pm and the density of the element is 5.0 g cm$$-$$3. Calculate the number of atoms in 100 g of this element.
A
2.5 $$\times$$ 1023
B
2.5 $$\times$$ 1024
C
5.0 $$\times$$ 1023
D
5.0 $$\times$$ 1024
4
WB JEE 2020
+1
-0.25
In the face centered cubic lattice structure of gold the closest distance between gold atoms is ('a' being the edge length of the cubic unit cell)
A
$$a\sqrt 2$$
B
$${a \over {\sqrt 2 }}$$
C
$${a \over {2\sqrt 2 }}$$
D
$$2\sqrt 2 a$$
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