NEET (NTA)National Eligibility cum Entrance Test (Medical) Chemistry: Questions 499  505 of 1195
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Question number: 499
» States of Matter » Solid State » Bragg's Law and Its Applications
Question
Bragg’s law is given by the following equation?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 500
» States of Matter » Solid State » Imperfection in Solids
Question
In potassium chloride crystal, what type of defects may arise generally?
Choices
Choice (4)  Response  

a.  Fankels defect 

b.  Shottky defect 

c.  None of the above 

d.  All of the above 

Question number: 501
» States of Matter » Solid State » Calculations Involving Unit Cell Parameters
Question
A unit cell of sodium chloride has four formula units. The edge length of unit cell is 0.64 nm. What is the density of sodium chloride?
Choices
Choice (4)  Response  

a.  5.34 g/cm^{3} 

b.  3.22 g/cm^{3} 

c.  7.23 g/cm^{3} 

d.  2.16 g/cm^{3} 

Question number: 502
» States of Matter » Solid State » Packing in Solids (Fcc, Bcc and Hcp Lattices)
Question
In the face centered cubic structure, what will be the contribution of atoms per unit cell?
Choices
Choice (4)  Response  

a.  2 

b.  1 

c.  3 

d.  4 

Question number: 503
» States of Matter » Solid State » Calculations Involving Unit Cell Parameters
Question
Density of lithium atom is 0.53 g/cm^{3}. The edge length of lithium is 3.5 A°. Find out the number of lithium atoms in a unit cell. Atomic mass of lithium is 6.94?
Choices
Choice (4)  Response  

a.  1 

b.  2.5 

c.  3.3 

d.  2 

Question number: 504
» States of Matter » Solid State » Calculations Involving Unit Cell Parameters
Question
The atomic radius (r) in simple cubic unit cell is?
Choices
Choice (4)  Response  

a.  a/2 

b.  2a 

c.  a/√2 

d.  a/4 

Question number: 505
» States of Matter » Solid State » Packing in Solids (Fcc, Bcc and Hcp Lattices)
Question
Chromium metal crystallizes with a body centered cubic lattice. The length of the unit cell edge is found to be 287 pm. Calculate the atomic radius?
Choices
Choice (4)  Response  

a.  1.98 A° 

b.  2.19 A° 

c.  2.56 A° 

d.  1.85 A° 
