Question

When a certain crystal was studied by the Bragg technique using X – rays of wavelength 229 pm, an X – ray reflection was observed at an angle of 230 20’. What is the corresponding interplanar spacing? [sin (23020’) = 0.396]

Solution

Correct option is

289.2 pm

 

Given that,

λ = 229 pm and θ = 23020’

substituting these value in the Bragg’s equation, we have

    

                        

                      = 289.2 pm

SIMILAR QUESTIONS

Q1

In A+ B- ionic compound, radii of A+ and B- ions are 180 pm and 187 pm respectively. The crystal structure of this compound will be

Q2

Sodium metal crystallizes as a body centred cubic lattice with the cell edge 4.29 . What is the radius of sodium atom?

Q3

An fcc lattice has a lattice parameter a = 400 pm. Calculate the molar volume of the lattice including all the empty space.

Q4

The structure of Na2O crystal is

Q5

Structure similar to zinc blende is found in

Q6

The number of equidistance oppositely charged ions in a sodium chloride crystal is

Q7

What is the coordination number of sodium in Na2O?

Q8

In zinc blende structure, the coordination number of Zn2+ ion is

Q9

In the calcium fluoride structure, the coordination number of the cation and anion are respectively

Q10

Potassium fluoride has NaCl type structure. What is the distance between K+ and F- ions if cell edge is a cm?