The unit cell present in ABCABC……. closest packing of atom is

Which of the following statements is correct in the rock-salt structure of ionic compounds ?

Which of the following expressions is correct in the case of a sodium chloride will cell (edge length, a)?

(A) r_c + r_a­ = a              (B) r_c + r_a­ = a/2

(C) r_c + r_a­ = 2a           (D) r_c + r_a­ = 2^1/2a

The coordination number of cation and anion in Fluorite CaF₂ and Rutile TiO₂ are respectively

Which of the following statement is not correct ?

The interstitial hole is called tetrahedral because

The tetrahedral voids formed by ccp arrangement of Cl^– ions in rock salt structure are

The coordination number of hexagonal closest packed (hcp) structure is

If the positions of Na⁺ and Cl^– are interchanged in NaCl, the crystal lattice with respect to Na⁺ and Cl^– is :

The number of nearest neighbours around each particle in a face-centred cubic lattice is

If the anions (A) form hexagonal closest packing and cations (C) occupy only 2/3 octahedral voids in it, then the general formula of the compound is

(A) CA             (B) CA₂             (C) C₂A₃             (D) C₃A₂

The edge length of unit cell of sodium chloride is 564 pm. If the size of Cl^– ion is 181 pm, the size of Na⁺ would be

A solid is formed and it has three types of atoms X, Y, Z. X forms a FCC lattice with Y atoms occupying all the the tetrahedral voids and Z atoms occupying half the octahedral voids. The formula of the solid is :

(A) X₂Y₄Z               (B) XY₂Z₄               (C) X₄Y₂Z                 (D) X₄YZ₂

The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight. The crystal class is

At the limiting value of radius ratio r₊ / r_–, the