NEET Chemistry The Solid State Questions Solved


Ice crystallises in a hexagonal lattice having volume of the unit cell as 132 x 1024 cm3.   

If density is 0.92 g/cm3 at a given temperature, then number of  H20 molecules per unit cell is

(1) 1

(2) 2

(3) 3

(4) 4

Mass     = Density

Volume

Mass of n molecules of H20 in hexagonal packing.

= 18n     =          18n                      
    NA              6.023x10 23

  ∴  0.92=                18n                    = 4
                    6.023x1023X132X10-24

  

Difficulty Level:

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