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Ionic solids: NaCl, CsCl, ZnS, CaF2, Na2O structures

36 questions on Ionic solids: NaCl, CsCl, ZnS, CaF2, Na2O structures from the Solid State chapter: 8 NEET level, 14 JEE Main, 14 JEE Advanced. Each one opens with its answer and solution.

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In the sodium chloride crystal, the coordination number of Na+ is NEET level
In the cesium chloride structure, the number of Cl- ions that surround each Cs+ ion is NEET level
The number of formula units of ZnS (zinc blende) per unit cell is NEET level
In the fluorite structure of CaF2, the fluoride ions occupy NEET level
Sodium oxide has the antifluorite structure. The coordination numbers of Na+ and O^2- are respectively JEE Main level
For an ionic solid the cation radius is 148 pm and the anion radius is 195 pm. The radius ratio predicts a coordination number of JEE Main level
In the NaCl structure, the number of second nearest neighbours (same type of ion) of a given Na+ ion is JEE Main level
In zinc blende (ZnS), the fraction of tetrahedral voids of the sulfide ccp lattice that are occupied by Zn^2+ is JEE Main level
Potassium chloride crystallises in the NaCl type lattice with edge 630 pm (molar mass 74.5 g mol^-1). Use N_A = 6.022x10^23 mol^-1. Calculate its density in g c... JEE Main level
In a CsCl-type crystal the radii of the cation and anion are 169 pm and 181 pm, and ions touch along the body diagonal. With sqrt3=1.732, calculate the unit cel... JEE Main level
Which statements about the NaCl crystal structure are correct? JEE Main level
In a cubic crystal the cation M is at the 8 corners, cation N is at the body centre and the anion X^2- is at the centres of all 12 edges. The charge on N, given... JEE Advanced level
Antifluorite Na2O has a unit cell edge of 555 pm. Taking sqrt3=1.732, the shortest Na+-Na+ distance and the shortest Na+-O^2- distance (in pm) are respectively JEE Advanced level
Zinc sulfide (zinc blende type, Z=4, molar mass 97.5 g mol^-1) has a unit cell edge of 541 pm. Use N_A = 6.022x10^23 mol^-1. Calculate the density in g cm^-3 (t... JEE Advanced level
Calcium fluoride (molar mass 78 g mol^-1) has a density of 3.15 g cm^-3 and the fluorite structure. Use N_A = 6.022x10^23 mol^-1. Using sqrt3=1.732, calculate t... JEE Advanced level
A hypothetical salt MX (formula mass 80 g mol^-1) has the NaCl structure with the anions (r=206 pm) just touching each other along the face diagonal (limiting r... JEE Advanced level
Which statements about ionic crystal structures are correct? JEE Advanced level
The radius ratio rule is applied to four ionic compounds (all radii in pm). Which predictions are correct? JEE Advanced level
In the rock salt structure of NaCl, the coordination numbers of Na+ and Cl- are, respectively, NEET level
The number of CsCl formula units present in one unit cell of cesium chloride is NEET level
In zinc blende, ZnS, the sulphide ions form a ccp lattice and the Zn^2+ ions occupy NEET level
In the fluorite structure of CaF2, the coordination numbers of Ca^2+ and F- are, respectively, NEET level
An ionic solid MX has r_+ = 95 pm and r_- = 181 pm. Using the radius ratio rule, the structure and the coordination number of the cation are JEE Main level
Na2O crystallises in the antifluorite structure. Which statement describes it correctly? JEE Main level
In the unit cell of NaCl (fcc Cl-, Na+ at the edge centres and body centre), all Cl- ions at the face centres are removed and nothing else is changed. The simpl... JEE Main level
NaCl has an fcc arrangement of Cl- ions with an edge length a = 562 pm. Taking the molar mass as 58.5 g mol^-1 and N_A = 6.022x10^23 mol^-1, calculate the densi... JEE Main level
In a CsCl-type crystal the edge length of the cubic cell is 412 pm and the radius of the anion is 181 pm. Using sqrt3 = 1.732 and assuming cation-anion contact ... JEE Main level
Zinc blende (ZnS) has a cubic cell of edge 541 pm. Each Zn^2+ is at the centre of a regular tetrahedron of S^2- ions. Using sqrt3 = 1.732, find the Zn-S distanc... JEE Main level
CaF2 (molar mass 78 g mol^-1) crystallises with an fcc lattice of Ca^2+ and cell edge 546 pm. Given N_A = 6.022x10^23 mol^-1, calculate its density in g cm^-3 (... JEE Main level
In a compound the anions X form a ccp lattice and the cations Y occupy three-fourths of the tetrahedral voids. The formula of the compound and the number of cat... JEE Advanced level
A CsCl-type solid has r_+/r_- = 0.732 (the limiting value), so anions touch each other along the cell edge and the cation touches the anions along the body diag... JEE Advanced level
In a rock-salt type solid MX the anion radius is 190 pm and the cation just fits the octahedral void, so r_+/r_- = sqrt2 - 1 (take sqrt2=1.414). Cations and ani... JEE Advanced level
A CsCl-type crystal has molar mass 168.5 g mol^-1 and density 3.99 g cm^-3. Using N_A = 6.022x10^23 mol^-1 and sqrt3 = 1.732, calculate the distance between the... JEE Advanced level
Which of the following statements about the NaCl crystal structure are correct? JEE Advanced level
Which statements about CaF2 and Na2O are correct? JEE Advanced level
Radius ratio r_+/r_- is computed from these radii (pm): Zn^2+ 74, S^2- 184; Cs+ 169, Cl- 181; Mg^2+ 72, O^2- 140; Be^2+ 35, O^2- 140. Using the ranges 0.225-0.4... JEE Advanced level