19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Total number of voids in 0.5 mole of a compound forming hexagonal closed packed structure are
A solid is formed by two elements P and Q. The element Q forms cubic close packing and atoms of P occupy one third of tetrahedral voids. The formula of the compound is [AMU 2010]
AB crystallises in a body-centred cubic lattice with edge 'a' equal to 387 pm. The distance between two oppositely charged ions in the lattice is (CBSE AIPMT 2010)
Three elements A, B and C crystallise into a cubic solid lattice. Atoms A occupy the corners, B atoms, the cube centres and C atoms, the face. The formula of the compound is [AMU 2009]
The appearance of colour in solid alkali metal halides is generally due to [RPMT 2010]
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
The metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g/cm3. The molar mass of the metal is (NA =Avogadro's constant 6.02 10 mol ) x (NEET 2013)
Schottky defect in crystals is observed when
Which of the following defects are also called thermodynamic defects?
Which kind of defect is shown by the given crystal?
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]
In a solid lattice the cation has left a lattice site and is located at an interstitial position, the lattice defect is
The correct statement regarding F-centre is
Zinc oxide loses oxygen on heating according to the reaction, heat ZnO Zn O 2e → It becomes yellow on heating because
The number of atoms per unit cell of bcc structure is [Kerala CEE 2009]
The property of crystalline solid is not
Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as 4.0 g cm–3, then the number of Fe²⁺ and O₂– ions present in each unit cell will be
Which of the following fcc structure contains cations in alternate tetrahedral voids ?
Which defect causes decrease in the density of crystal
A compound of ‘A’ and ‘B’ crystallizes in a cubic lattice in which the ‘A’ atoms occupy the lattice points at the corners of the cube. The ‘B’ atoms occupy the centre of each face of the cube. The probable empirical f…
If a is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be (AIPMT 2014)
Which of the following can be regarded as molecular solid? (EAMCET 2014)
Copper crystallises in face centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm? (Manipal 2014)
The vacant space in bcc lattice unit cell is (AIPMT 2015)
A sample of electrically neutral NaCl crystal is analysed for its density which has some unoccupied sites. Two readings where taken.