ThePrismSolutions

ThePrismSolutions

DAILY PRACTICE PAPER(19Th June 2018)

(1) One among the following is an example of ferroelectric compound-

(a) Quartz           (b) Lead Chromate
(c) Barium titanate    (d) Tourmaline

(2) Certain crystal produce electric signals on application of pressure .This phenomenon is called

(a) Pyro electricity    (b) Ferroelectricity
(c) Piezoelectricity    (d) Ferrielectricity

(3) Which of the following effect ,If present lowers the density of the crystal-

(a) Frenkel         (b) Schottky
(c) Edge dislocation  (d) Constitution of F-centers

(4) The yellow colour of ZnO and conducting nature produced in heating is due to

(a) metal excess defects due to interstitial cation
(b) Extra positive ions present is an interstitial site
(c) Trapped electrons.
(d) All

(5) In antiflourite structure ,the negative ions

(a) Occupy tetrahedral voids
(b) Occupy octahedral voids
(c) Are arranged in ccp
(d) Are arranged in hcp



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