## The Solid State Quiz-2

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies.Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1. In the closest packing of atoms
•  The size of TV is greater than that of OV
•  The size of TV is smaller than that of OV
•  The size of TV is equal to that of OV
•  The size of TV may be greater or smaller or equal to that of OV depending upon the size of atoms
Solution
(b) For a given radius of anion Radius ratio for OV and TV is as follows: Hence, size of OV is larger than that of TV

Q2.In a hypothetical solid, C atoms are found to form cubical close-packed lattice. A atoms occupy all tetrahedral voids and B atoms occupy all octahedral voids

A and B atoms are of appropriate size, so that there is no distortion in the ccp lattice of C atoms. Now if a plane as shown in the following figure is cut, then the cross section of this plane will look like
•

•

•

•

Solution
(c) From figure, it is clear 4 corners and 2 face centers lie on the shaded plane. Therefore, there will be six C atoms, and atoms (marked A) in TVs do not touch other. Fig. (a) is not possible; four atom marked C Fig. (b) is not possible, atoms A in TVs are not shown in figure Fig. (c) is possible, since atoms A in TVs are not touching each other Fig. (d) is not possible, since atoms A in TVs are touching each other

Q3.  Superconductors are derived from the compounds of
•   p-block elements
•  Lanthanides
•  Actinides
•  Transition elements
Solution
(a) Factual statement

Q4. An ionic solid crystallizes as a bcc structure. The distance between cation and anion in the lattice is 338 pm. The edge length of cell is
•  338 pm
•  390.3 pm
•  292.7 pm
•  507 pm
Solution
Option (b)

Q5.Every atom or ion that forms an fcc unit cell is surrounded by
•  Six OVs and eight TVs
•  Eight OVs and six TVs
•  Six OVs and six TVs
•  Eight OVs and four TVs
Solution
(a) Look at corner atom of fcc unit cell. A corner atom can support 8 unit cell. In each cube, at a distance of from corner atom, there is a tetrahedral void; it implies each atom is surrounded by eight tetrahedral voids. At the center of edge, there is an octahedral void. Each corner can support six edges and hence it is surrounded by six octahedral voids

Q6. How many kinds of space lattices are possible in a crystal?
•  23
•  7
• 230
•  14
Solution
(d) All factual statements

Q7.A metal crystallizes in bcc lattice. The percent fraction of edge length not covered by atom is
•  10.4%
•  13.4%
•  12.4%
•  11.4%
Solution
Option (b)

Q8.In the crystals of which of the following ionic compounds would you expect maximum distance between the centers of the cations and anions?
•  LiF
•  TCsF
•  CsI
•  LiI
Solution

Q9.

•   Ni1.02O1.00
•  Ni0.96O1.00
•  Ni0.98O0.98
•  Ni0.98O1.00
Solution

Q10.

•  I⇒p-type, II⇒n-type
•  I⇒n-type, II⇒p-type
•  Both n-type
• Both p-type
Solution
Option (b)

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The Solid State Quiz-2