19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In a compound, atoms of element Y form ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be
Which type of defect present in NaCl ? (JIPMER 2019)
In NaCl lattice the radius ratio is Na Cl r r =
The unit cell of a NaCl lattice
Which of the following statements is not true about NaCl structure
How many chloride ions are there around sodium ion in sodium chloride crystal.
The structure of MgO is similar to NaCl. What would be the coordination number of magnesium.
In NaCl lattice the coordination number of Cl– ion is
The interionic distance for caesium chloride crystal will be
In A+ B– ionic compound, radii of A+and B– ions are 180 pm and 187 pm respectively. The crystal structure of this compound will be
If the value of ionic radius ratio c a r r is 0.52 in an ionic compound, the geometrical arrangement of ions in crystal is
The maximum radius of sphere that can be fitted in the tetrahedral hole of cubic close packing of sphere of radius r is.
For an ionic crystal of the general formula AX and coordination number 6, the value of radius ratio will be
If the radius of K+ and F– are 133 pm and 136 pm respectively, the distance between K+ and F– in KF is
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
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
In a Schottky defect,
Assuming the metal atom to be spherical and crystallizes in fcc lattice with edge length 407 pm, its radius will be
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
In a face centred cubic arrangement of A and B atoms when A atoms are at the corner of the unit cell and B atoms of the face centres. One of the A atom is missing from one corner in unit cell. The simplest formula o…
Which of the following is a pseudo solid