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NEET 2022 Phase 1
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Copper crystallises in fcc unit cell with cell edge length of 3.608 $$\times$$ 10$$-$$8 cm. The density of copper is 8.92 g cm$$-$$3. Calculate the atomic mass of copper.

A
63.1 u
B
31.55 u
C
60 u
D
65 u
2
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The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :
A
3
B
7
C
5
D
2
3
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Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
A
12, 6
B
8, 4
C
6, 12
D
2, 1
4
NEET 2020 Phase 1
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An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is :
A
$${{\sqrt 2 } \over 4} \times 288$$ pm
B
$${{4 } \over \sqrt 3} \times 288$$ pm
C
$${{4 } \over \sqrt 2} \times 288$$ pm
D
$${{\sqrt 3 } \over 4} \times 288$$ pm
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