1
MHT CET 2021 23th September Morning Shift
+1
-0

An element with BCC structure has edge length of $$500 \mathrm{~pm}$$. If it's density is $$4 \mathrm{~g} \mathrm{~cm}^{-3}$$, find atomic mass of the element?

A
$$150 \mathrm{~g} \mathrm{~mol}^{-1}$$
B
$$100 \mathrm{~g} \mathrm{~mol}^{-1}$$
C
$$125 \mathrm{~g} \mathrm{~mol}^{-1}$$
D
$$250 \mathrm{~g} \mathrm{~mol}^{-1}$$
2
MHT CET 2021 23th September Morning Shift
+1
-0

What is the atomic radius of polonium if it crystallises in a simple cubic structure with edge length of unit cell $$336 \mathrm{~pm}$$ ?

A
84 pm
B
168 pm
C
234 pm
D
336 pm
3
MHT CET 2021 22th September Evening Shift
+1
-0

Identify the type of unit cell that has particles at the centre of each face in addition to the particles at eight corners of a cube?

A
Face centred cubic unit cell
B
Hexagonal unit cell
C
Simple cubic unit cell
D
Body centred cubic unit cell
4
MHT CET 2021 22th September Evening Shift
+1
-0

How many atoms of niobium are present in $$2.43 \mathrm{~g}$$ if it forms bcc structure with density $$9 \mathrm{~g} \mathrm{~cm}^{-3}$$ and volume of unit cell $$2.7 \times 10^{-23} \mathrm{~cm}^3$$ ?

A
$$3.01 \times 10^{23}$$
B
$$4.1 \times 10^{22}$$
C
$$5.0 \times 10^{22}$$
D
$$2.0 \times 10^{22}$$
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