THE SOLID STATE (XII)
MULTIPLE CHOICE QUESTIONS ASSIGNMENT
Question 1
Which of the following is a molecular crystal? [KARNATAKA
CET 2010]
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(a) Dry ice
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(b) Quartz
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(c) Rock salt
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(d) Diamond
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Question 2
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The edge length of a face centred cubic cell of an ionic
substance is 508 pm. If the radius of the cation is 110 pm, the radius of the
anion is [AIEEE 2010]
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(a) 288 pm
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(b) 144 pm
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(c) 618 pm
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(d) 398 pm
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Question 3
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Sodium chloride, NaCl usually crystallizes in a face centred
cubic lattice. How many ions are in contact with any single Na+ ion? [DELHI
PMT 2010]
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(a) 8
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(b) 6
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(c) 4
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(d) 1
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Question 4
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Percentage of free space in cubic close packed structure and
in body centred packed structure are respectively [AIEEE 2010]
(a) 30% and 26%
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(b) 48% and 26%
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(c) 32% and 48%
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(d) 26% and 32%
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Question 5
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AB crystallizes in a body centred cubic lattice with edge
length 'a' equal to 387 pm. The distance between two oppositively charged
ions in the lattice is [CBSE AIPMT 2010]
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(a) 200 pm
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(b) 300 pm
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(c) 335 pm
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(d) 250 pm
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Question 6
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A compound contains two types of atoms X and Y. It
crystallizes in a cubic lattice with atoms X at the corners of the unit cell
and atoms Y at the body centre. The
simplest possible formula of this compound is: [DELHI PMT 2009]
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(a) X8Y
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(b) X2Y
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(c) XY
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(d) XY8
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Question 7
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Lithium metal crystallises in a body centred cubic
crystal. If the length of the side of the unit cell of lithium is 351 pm, the
atomic radius of the lithium will be: [CBSE AIPMT 2009]
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(a) 300.5 pm
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(b) 75.5 pm
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(c) 151.8 pm
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(d) 240.8 pm
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Question 8
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Copper crystallises in a face-centred cubic lattice with a
unit cell length of 361 pm. What is the radius of copper atom in pm? [CBSE
AIPMT 2009]
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(a) 108
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(b) 181
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(c) 157
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(d) 128
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Question 9
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Copper crystallizes in fcc with a unit cell length of 361
pm. What is the radius of copper atom? [AIEEE 2009]
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(a) 157 pm
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(b) 127 pm
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(c) 108 pm
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(d) 181 pm
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Question 10
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In which of the following crystals alternate tetrahedral voids are occupied? [IIT-JEE 2005]
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(a) NaCl
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(b) ZnS
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(c) CaF2
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(d) Na2O
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