# NEET Chemistry The Solid State Questions Solved

NEET - 2015

A given metal crystallises out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, what is the radius of one atom ?

(a) 40 pm

(b) 127 pm

(c) 80 pm

(d) 108 pm

Concept Videos :-

#9 | FCC Unit Cell: Packing Fraction
#20 | Rank of HP Unit Cell
#21 | Packing Fraction of HP Unit Cell
#24 | Density of Unit Cell

Concept Questions :-

Density/Formula/packing fraction/ Semiconductors

(b) Given, edge length = 361pm

Four metal atoms in one unit cell

i.e. effective number in unit cell (z) = 4 (given)
$\therefore$ It is a FCC Structure
$\therefore$ Face diagonal = 4r

Difficulty Level:

• 10%
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