19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Packing efficiency of simple cubic lattice is …A… Here, A refers to
Doping of silicon (Si) with boron (B) leads to
Which of the following is a pseudo solid
Sodium metal crystallizes as a body centred cubic lattice with the cell edge 4.29Å. What is the radius of sodium atom.
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
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
An element (atomic mass = 100 g/mol) having bcc structure has unit cell edge 400 pm. Then density of the element is
How many lithium atoms are present in a unit cell with edge length 3.5 Å and density 0.53 gcm –3? (Atomic mass of Li = 6.94)
An element with atomic mass 100 has a bcc structrue and edge length 400 pm. The density of element is
Crystalline solid is
The property of crystalline solid is not
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is
For tetrahedral coordination the radius ratio r r should be
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
The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is
The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is
In a face-centred cubic lattice, a unit cell is shared equally by how many unit cells
The correct statement regarding F-centre is
Number of unit cells in 4 g of X (atomic mass = 40) which crystallises in bcc pattern is (NA = Avogadro's number) (OJEE 2010) (a) A 0.1N (c) A 2 0.1N x (b) A 0.1N (d) A N x
A solid A+B– has the B– ions arranged as below. If the A+ ions occupy half of the octahedral sites in the structure. The formula of solid is
For the structure of solid given below if the lattice points represent A+ ions & the B– ions occupy all the tetrahedral voids then coordination number of A is
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]
If the coordination number of Ca²⁺ in CaF₂ is 8, then the coordination number of F– ion would be
The unit cell of a NaCl lattice
The tetrahedral voids present in 0.5 mole of hcp crystal structure are (AIIMS 2019) (a) 3.6 10 x (b) 9 10 x (c) 3.6 10 x (d) 6.02 10 x