19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A metal has bcc structure and the edge length of its unit cell is 3.04Å. The volume of the unit cell in cm will be
The number of atoms in 100 g of an FCC crystal with density d = 10 g cm –3 and cell edge as 200 pm is equal to
Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are o…
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?
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
Sodium metal crystallizes as a body centred cubic lattice with the cell edge 4.29Å. What is the radius of sodium atom.
Which of the following is an example of metallic crystal solid
An element (atomic mass = 100 g/mol) having bcc structure has unit cell edge 400 pm. Then density of the element is
Which of the following has the highest value of energy gap?
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 of …
A given metal crystallises out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, What is the radius of one atom? (AIPMT 2015)
Packing efficiency of simple cubic lattice is …A… Here, A refers to
Doping of silicon (Si) with boron (B) leads to
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
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)
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
Which of the following is a pseudo solid
The unit cell of aluminium is a cube with an edge length of 405 pm. The density of aluminium is 2.70 g cm –3. What is the structure of unit cell of aluminium?
Formula of nickel oxide with metal deficiency defect in its crystal is Ni₀.98O. The crystal contains Ni²⁺ and Ni³⁺. ions. The fraction of nickel existing as Ni²⁺ ions in the crystal is (NEET (Odisha) 2019)
Copper crystallises in face centred cubic lattice with a edge length of 361pm. What is the radius of copper atom in pm?
Given, Column A Column B A. Ionic solid I. NaCl B. Metallic solid II. Fe C. Covalent solid III. C(graphite) D. Molecular solid IV. Dry ice
A metal crystallizes in a face-centered unit cell. Its edge length is 0.410 nm. The radius of the metal is
The two dimensional coordination number of a molecule in square close packed layer is
The ratio of close-packed atoms to tetrahedral holes in cubic close packing is
Particles of quartz are packed by