NEET Chemistry The Solid State Questions Solved

NEET - 2009

Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be

(a) 240.8 pm

(b) 151.8 pm

(c) 75.5 pm

(d) 300.5 pm

Concept Videos :-

#0 | Introduction to Solid State
#1 | Introduction to Unit Cell
#2 | Types of Unit Cell
#3 | Simple Cubic Unit Cell: Rank (z)
#6 | Body Centred Cubic (BCC) Unit Cell
#8 | Face Centred Cubic (FCC) Unit Cell
#12 | Hexagonal Close Packing Arrangement
#13 | Cubic Close Packing Arrangement
#14 | Layer Arrangement in FCC
#25 | Ionic Structure of Rock Salt

Concept Questions :-

Introduction and Type of Crystal System

In case of body centred  cubic (bcc) crystal, a3=4r

Hence, atomic radius of lithium,r = a3/4

=(351x1.732)/4

= 151.98 pm

Difficulty Level:

  • 13%
  • 71%
  • 10%
  • 8%
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