19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following does not show electrical conduction in its physical state ? (CBSE AIPMT 2013)
A solid AB has NaCl structure. If the radius of cation A+ is 170 pm. Calculate the maximum possible radius of the anion B (WB JEE 2013)
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)
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)
The number of tetrahedral and octahedral voids in a CCP array of 100 atoms are respectively (Kerala CEE 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)
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
Formula of nickel oxide with metal deficiency defect in its crystal is Ni0.98O. The crystal contains Ni2+ and Ni3+. ions. The fraction of nickel existing as Ni2+ ions in the crystal is (NEET (Odisha) 2019)
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
Which type of defect present in NaCl ? (JIPMER 2019)
The correct option for the number of body centred cubic unit cells in all 14 types of Bravais lattice unit cells is: [NEET 2021]
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are [NEET 2021]
Example of unit cell with crystallographic dimensions , 90º, 90º a b c is
Number of unit cells in 4 g of X (atomic mass=40). Which crystallises in bcc pattern is (NA=Avogadro number)
Total volume of atoms present in a face centred cubic unit cell of a metal is (r = radius of atom) (a) r (b) r (c) r (d) r
Edge length of a cube is 400 pm, its body diagonal would be
A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is ‘a’, the closest approach between two atoms in metallic crystal will be :
Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å. The radius of sodium atom is approximately:
A sample of electrically neutral NaCl crystal is analysed for its density which has some unoccupied sites. Two readings where taken.
Density of NaCl crystal assuming all sites are occupied = 2.178 × 103 kg m–3
Density of NaCl crystal by not considering the unoccupied sites but only the occupied sites = 2.165 × 103 kg m–3. The percentage of unoccupied sites in NaCl crystal is
Ag crystallises as fcc. If radius of Ag is 144 pm then its density will be (a)10 g cm–3
A metallic element has a cubic lattice. Each edge of the unit cell is 2 Å. The density of the metal is 2.5 g cm–3 . The unit cells in 200 g of the metal are
The density of KBr is 2.75 g cm –3. The length of the unit cell is 654 pm. Atomic mass of K = 39, Br = 80. Then the solid is