1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Metallic conductors and semiconductors are heated separately. What are the changes with respect to conductivity?

A
increase, decrease
B
decrease, decrease
C
increase, decrease
D
decrease, increase
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

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
3
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
Change Language

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
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
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
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