NEET Chemistry The Solid State Questions Solved


The diffraction of barium with X-radiation of wavelength 2.29Å gives a first – order reflection at 30°. What is the distance between the diffracted planes.

(1) 3.29 Å

(2) 4.39 Å

(3) 2.29 Å

(4) 6.29 Å

(3) Using Bragg's equation 2dsinθ=nλ

d=nλ2sinθ, where d is the distance between two diffracted planes, θthe angle to have maximum intensity of diffracted X-ray beam, n the order of reflection and λ is the wavelength

d=1×2.29Å2×sin30o=2.29Å     sin30o=12  

Difficulty Level:

  • 10%
  • 18%
  • 69%
  • 5%
Crack NEET with Online Course - Free Trial (Offer Valid Till August 28, 2019)