19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The two dimensional coordination number of a molecule in square close packed layer is
If the number of atoms per unit cell in a crystal is 2, the structure of crystal is
In ccp arrangement the pattern of successive layers can be designated as
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
Crystals can be classified into basic crystal habits equal to
The property of crystalline solid is not
Tetragonal crystal system has the following unit cell dimensions
Solid CO₂ is an example of
Which of the following is an example of metallic crystal solid
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
The number of atoms contained (i) in one body centred cubic unit cell and (ii) in one face centred cubic unit cell, is
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
Electrons in a paramagnetic compound are
Those substances which show permanent magnetism even in the absence of magnetic field are called
Assertion No compound has both Schottky and Frenkel defects. Reason Both defects change the density of the solid. [AIIMS 2008]
Identify the incorrect statement.
Doping of silicon (Si) with boron (B) leads to
On the basis of their magnetic properties, substances can be classified into …A… categories. Here, A refers to
Which of the following is non-crystalline solid
Which of the following has the highest value of energy gap?
Which of the following is a pseudo solid
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
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