19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Aluminium has fcc structure. The length of the unit cell is 404 pm. If the density of the metal is 2.7 g cm–3, the molar mass of Al atom is
An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of the cube. The empirical formula for this compounds would be
For a solid with the following structure, the co- ordination number of the point B is
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is
For tetrahedral coordination the radius ratio r r should be
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is
The total volume of atoms present in face-centred cubic unit cell of a metal is (r is atomic radius) (a) r (b) r (c) r (d) r
The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is
The number of atoms per unit cell in primitive (sc), body-centered (bcc), face-centered (fcc) and end- centered (ecc) unit cell decreases as
In a face-centred cubic lattice, a unit cell is shared equally by how many unit cells
In a cubic lattice of ABC, A atoms are present at all corners except one corner which is occupied by B atoms. C atoms are present at face centers. The formula of the compound is
Copper crystallises in face centred cubic lattice with a edge length of 361pm. What is the radius of copper atom in pm?
A metal crystallizes in a face-centered unit cell. Its edge length is 0.410 nm. The radius of the metal is
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