ThePrismSolutions

ThePrismSolutions

DAILY PRACTICE PAPER(12Th June 2018)

(Q) Wax is a example of

(a) Ionic crystal      (b) Covalent crystal
(c) Amorphous solid   (d) Metallic crystal

(Q) Which is covalent solid

(a) Fe2O3       (b) Diamond
(c) Graphite    (d) All

(Q) The maximum percentage of available volume that can be filled in a face centered cubic system by an atom is

(a) 74%     (b) 68%
(c) 34%     (d) 26%

Q.) (Q) In a centered cubic arrangement ,the number of atoms per unit cell is:

(a) 4   (b) 6
(c) 8   (d) 12

(Q) The second order Bragg diffraction of X-Rays with λ = 1.0 Å from a set of parallel planes in a metal occurs at an angle of 60° .The distance between the scattering planes in the crystal is -

(a) 1.555 Å   (b) 1.0 Å
(c) 2.0 Å     (d) 1.7 Å



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