Advertisements
Advertisements
Question
Which of the following is not true about the ionic solids?
Options
Bigger ions form the close packed structure.
Smaller ions occupy either the tetrahedral or the octahedral voids depending upon their size.
Occupation of all the voids is not necessary.
The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids.
Advertisements
Solution
The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids.
Explanation:
The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions present at the lattice points. As we know the radii of octahedral or tetrahedral void is related to radii of atoms (r) as Radius of octahedral void (R0) = 0.414 r.
Radius of tetrahedral void (R1 ) = 0.225 r Where, r = radius of bigger atom involved.
APPEARS IN
RELATED QUESTIONS
Explain the basis of similarities between metallic and ionic crystals.
Classify the following molecular solids into different types:
- HCl
- CO2
- Solid ice
- SO2
Answer the following in one or two sentences.
A solid is hard, brittle and electrically nonconductor. Its melt conducts electricity. What type of solid is it?
A compound crystallizes in bcc structure. What is unit cell edge length if diameter of its atom is 120 pm?
Assertion: monoclinic sulphur is an example of a monoclinic crystal system
Reason: for a monoclinic system, a ≠ b ≠ c and α = γ = 90°, β ≠ 90°
Give any three characteristics of ionic crystals.
If NaCl is doped with 10−2 mol percentage of strontium chloride, what is the concentration of cation vacancy?
Select the INCORRECT match:
Dry ice is an example of ____________.
Which among the following is NOT a polar molecular solid?
Brass is an example of ____________.
Solid X is a very hard electrical insulator in solid as well as in molten state. It melts at extremely high temperature. Solid X is a ____________.
What type of interaction hold the molecules together in a polar molecular solid?
Which among the following is an example of non-polar molecule?
An AB2 type structure is found in ____________.
Iodine molecules are held in the crystals lattice by ______.
A crystal with a ≠ b ≠ c and α = β = γ = 90° is
Which of the following exists as covalent crystals in the solid state?
The covalent bond length is the shortest in which one of the following bonds?
Calculate the angle at which first order reflection will occurs in an X-ray spectrometer when x ~ rays of wavelength \[\ce{1.54 \overset{\circ}{A}}\] are diffracted by the atoms of a crystal given that inter planer distance is \[\ce{0.04 \overset{\circ}{A}}\]
