19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The ratio of close-packed atoms to tetrahedral holes in cubic close packing is
The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is
A solid A+B– has the B– ions arranged as below. If the A+ ions occupy half of the octahedral sites in the structure. The formula of solid is
For the structure of solid given below if the lattice points represent A+ ions & the B– ions occupy all the tetrahedral voids then coordination number of A is
The number of octahedral voids in a unit cell of a cubical closest packed structure is
In CsCl lattice the coordination number of Cl– ion is
If the coordination number of Ca²⁺ in CaF₂ is 8, then the coordination number of F– ion would be
What is the coordination number of sodium in Na₂O
The unit cell of a NaCl lattice
Which of the following statements is not true about NaCl structure
In NaCl lattice the radius ratio is Na Cl r r =
In NaCl lattice the coordination number of Cl– ion is
In CsCl structure, the coordination number of Cs⁺ is
The number of formula unit in unit cell of CsCl, type is
The interionic distance for caesium chloride crystal will be
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
If the value of ionic radius ratio c a r r is 0.52 in an ionic compound, the geometrical arrangement of ions in crystal is
The maximum radius of sphere that can be fitted in the tetrahedral hole of cubic close packing of sphere of radius r is.
For an ionic crystal of the general formula AX and coordination number 6, the value of radius ratio will be
If the radius of K⁺ and F– are 133 pm and 136 pm respectively, the distance between K⁺ and F– in KF is
Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as 4.0 g cm–3, then the number of Fe²⁺ and O₂– ions present in each unit cell will be
Which of the following fcc structure contains cations in alternate tetrahedral voids ?
Which defect causes decrease in the density of crystal
In a solid lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is
The correct statement regarding F-centre is