19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
Potassium has a bcc structure with nearest neighbour distance 4.52 Å. Its atomic weight is 39. Its density will be
The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is
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
Packing efficiency of simple cubic lattice is …A… Here, A refers to
In ccp arrangement the pattern of successive layers can be designated as
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 …
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
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
The property of crystalline solid is not
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
Crystals can be classified into basic crystal habits equal to
Solid CO₂ is an example of
Which of the following is a pseudo solid
Which of the following is an example of metallic crystal solid
Tetragonal crystal system has the following unit cell dimensions
Which of the following has the highest value of energy gap?
Crystalline solid is
Doping of silicon (Si) with boron (B) leads to
The number of atoms contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is
If the number of atoms per unit cell in a crystal is 2, the structure of crystal is
The two dimensional coordination number of a molecule in square close packed layer is
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
If the coordination number of Ca²⁺ in CaF₂ is 8, then the coordination number of F– ion would be