19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
For tetrahedral coordination the radius ratio r r should be
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
Amorphous solids are
Solid SO₂ and NH₃ are the examples of which of the following types of solids? (CBSE 2018)
NaCl is an example of
Crystals can be classified into basic crystal habits equal to
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is
A solid has a structure in which W atoms are located at the corners of a cubic lattice. O atoms at the centre of edges and Na atom at centre of the cube. The formula for the compound is (AllMS 2018) (a) NaWO (b) NaWO …
The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is
Tetragonal crystal system has the following unit cell dimensions
For an ionic crystal of the general formula AX and coordination number 6, the value of radius ratio will be
Which is not a property of solids
Lithium has a bcc structure. Its density is 520 kg m–3 and its atomic mass is 6.94 g mol–1. Calculate the edge length of a unit cell of Lithium metal. (NA = 6.02 × 1023 mol–1) (NEET 2016)
The two dimensional coordination number of a molecule in square close packed layer is
How many chloride ions are there around sodium ion in sodium chloride crystal.
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 with atomic mass 100 has a bcc structrue and edge length 400 pm. The density of element is
In ccp arrangement the pattern of successive layers can be designated as
Ag forms ccp lattice and X-ray studies show that the edge length of its unit cell is 408.6 pm. Find the density of silver. (Given that atomic mass of silver = 107.9 u)
In hcp arrangement, the number of nearest neighbours are
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
The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class 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
Assuming the metal atom to be spherical and crystallizes in fcc lattice with edge length 407 pm, its radius will be
The structure of MgO is similar to NaCl. What would be the coordination number of magnesium.