19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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)
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
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]
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…
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]
Zinc oxide loses oxygen on heating according to the reaction, heat ZnO Zn O 2e → It becomes yellow on heating because
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 of bcc structure is [Kerala CEE 2009]
Which of the following compounds shows both Frenkel and Schottky defects [AMU 2010]
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
Which defect causes decrease in the density of crystal
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
Total number of voids in 0.5 mole of a compound forming hexagonal closed packed structure are
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]
Which one of the following is a covalent crystal? [KCET 2011]
The metal crystallises with a face-centred cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is (CBSE AIPMT 2012)
Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A and the octahedral voids are o…
Alkali metals readily …X… electron to give monovalent M+ ion. Here, X refer to
…A… has maximum degree of hydration. Here, A refers to
Which of the following metal salt is mostly hydrated?
Choose the correct option from the codes given below regarding elements and their characteristics colour given in Column I and II of the following table. Column I Column II A. Li 1. Crimson red B. Na 2. Yellow C. K 3.…
Choose the correct statements(s) among the following. I. Alkali metal is highly reactive. II. Alkali metal has lowest ionization enthalpy among their respective period. III. Ionization energy of alkali metals increase…
The oxidation state of K in KO₂ is …A… and the bonding type is …B… Here, A and B refer to