19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
If the number of atoms per unit cell in a crystal is 2, the structure of crystal is
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
The two dimensional coordination number of a molecule in square close packed layer is
The number of formula unit in unit cell of CsCl, type is
Which of the following is a pseudo solid
Which of the following is non-crystalline solid
Solid CO₂ is an example of
The maximum radius of sphere that can be fitted in the tetrahedral hole of cubic close packing of sphere of radius r is.
Those substances which show permanent magnetism even in the absence of magnetic field are called
Electrons in a paramagnetic compound are
Assertion No compound has both Schottky and Frenkel defects. Reason Both defects change the density of the solid. [AIIMS 2008]
Which of the following fcc structure contains cations in alternate tetrahedral voids ?
Which of the following is an example of metallic crystal solid
In ccp arrangement the pattern of successive layers can be designated as
Which of the following has the highest value of energy gap?
Doping of silicon (Si) with boron (B) leads to
Identify the incorrect statement.
On the basis of their magnetic properties, substances can be classified into …A… categories. Here, A refers to
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
If ‘a’ stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these system will be respectively. [CBSE AIPMT 2008]
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
If in a crystal lattice of a compound, each corner of a cube is enjoyed by sodium, each edge of a cube has oxygen and centre of cube is enjoyed by tungsten (W), then give its formula [Guj. CET 2011]