Solid State Tes...

An ionic compound XY forms a crystal structure in which 'Y' atoms form ccp lattice and 'X' atoms are sopositioned that each 'X'-atom touches 6'Y'-atoms. If the nearest distance between two 'X'-atoms is $$2\sqrt{2}$$ ,then the density ($$g/cm^{3}$$) of XY crystal is :

Analysis show that nickel oxide consist of nickel ion with 96% ions having $$d^a$$ configuration and 4% having $$d^7$$ configuration. Which amongst the following best represents the formula of the oxide?

Consider a cube containing n unit cells of a cubic system. A plane ABCD obtained by joining the mid points of the edges on one of its identical faces had atoms arranged as shown. Let p be the packing fraction. Choose the correct option:

Which one of the following is a pseudo solid?

The volume occupied by atoms in a simple cubic unit cell is (edge length $$=$$ a) :

Which of the following has a regular repeated molecular pattern in three dimensional space?

Statement 1: Distance between nearest lattice points in BCC is greater than the same in FCC having same edge length.
Statement 2: FCC has greater packing efficiency than BCC.

The interstitial hole is called tetrahedral because :

If edge length of the cube is $$3.60A^o$$, then radius of carbon atom is:

A unit cell of sodium chloride has four formula units. The edge of length of the unit cell is $$0.564$$ nm. What is the density (in g/cc) of sodium chloride?