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
WB JEE Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12