GEOLOGY
CRYSTALLOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Crystallography is the experimental science of the arrangement of atoms in solids.
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It is the branch of science concerned with the structure and properties of crystals
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Something is crystalline if the atoms or ions that compose it are arranged in a regular way
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all are incorrect
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Detailed explanation-1: -Statement 2 : In NaHCO3 and HCO-3 ions are linked together through intermolecular hydrogen bonds into an infinite chain, while in KHCO3, HCO−3 ions form dimeric anions through intermolecular hydrogen bonds. Both Statement 1 and Statement 2 are true.
Detailed explanation-2: -We should know that in zinc blende structure (ZnS), sulphide ions are face-centred and zinc is present in alternate tetrahedral voids. Formula is ZnS. Coordination number of Zn is 4 and that of sulphide is 4. So, from this we can say that this statement is incorrect.
Detailed explanation-3: -Solution : Each Cs ion is surrounded by 8 ‘Cl^(-)‘ ions and each ‘Cl^(-)‘ ion is surrounded by 8 ‘Cs^(+)‘ ions. CsCl has a bcc type structure. Thus, the structure has 8:8 coordination number.
Detailed explanation-4: -Cation, Cs+ is at the body centre of the cube and all anions are at the corner of the cube.