19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In a crystalline solid, having formula XY2O4, oxide ions are arranged in cubic close packed lattice while, cations X are present in tetrahedral voids and cations Y are present in octahedral voids. The percentage of te…
The number of atoms per unit cell in primitive (sc), body-centered (bcc), face-centered (fcc) and end- centered (ecc) unit cell decreases as
An alloy of Cu, Ag and Au is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centre and gold is present at body centre, the alloy has a formula
In a face centred cubic arrangement of A and B atoms when A atoms are at the corner of the unit cell and B atoms of the face centres. One of the A atom is missing from one corner in unit cell. The simplest formula o…
In a cubic structure of compound which is made from X and Y, where X atoms are at the corners of the cube and Y at the face centres of the cube. The molecular formula of the compound is
An element has a body-centred cubic (bcc) structures with a cell edge of 444 pm. The density of the element is 7.2 g/cm3. How many atoms are present in 404 g of the element?
The unit cell of a NaCl lattice
A compound is formed by elements A and B. This crystallizes in the cubic structure when atoms A are the corners of the cube and atoms B are at the centre of the body. The simplest formula of the compound is
In a face-centred cubic lattice, a unit cell is shared equally by how many unit cells
An atom forms face centred cubic crystal with density d = 8.92g/mL and edge length a 3.6 10 cm x . The molecular mass of atom in amu is (JIPMER 2018)
The formula for determination of density of unit cell is (a) a N g cm N M A x x (b) M g cm a N A Z x x (c) a M g cm N N A x x (d) M N g cm a N A x x
Niobium crystallises in body centred cubic structure. If density is 8.55 g cm-3, then the atomic radius of niobium is (atomic mass of niobium = 93u) (AllMS 2018)
The two dimensional coordination number of a molecule in square close packed layer is
The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is
In ccp arrangement the pattern of successive layers can be designated as
What is the coordination number of body centre cubic lattice?
Packing efficiency of simple cubic lattice is …A… Here, A refers to
In hcp arrangement, the number of nearest neighbours are
The correct order of the packing efficiency in different types of unit cell is …A… Here, A refers to
Tetragonal crystal system has the following unit cell dimensions
Crystals can be classified into basic crystal habits equal to
The number of atoms contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is
The number of atoms or molecules contained in one body centered cubic unit cell is
A particular solid is very hard and has a high melting point. In solid state, it is a non-conductor and its melt is a conductor of electricity. Classify the solid.
Bravais lattices are of