NEET Chemistry Lectures

Solid State Chemistry Class 12 Important Questions with Answers pdf

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01.	Class 12 Chemistry Important Questions
02	Very Important Questions for Class 12 Chemistry
03	Important Questions for Class 12 Chemistry Chapter 1 The Solid State
04	Solid State Class 12 Important Questions and Answers
05	Chemistry Solid State Class 12 Important Questions and Answers PDF
06	Solid State Class 12 Important Questions With Answers PDF
07	Solid State Questions And Answers PDF
08	Solid State Questions for Class 12 Chemistry
09	Solid State Class 12 Important Questions With Answers
10	Top Solid State Chemistry Questions and Answers PDF

Question 31.
Write a distinguishing feature between a metallic solid and an ionic solid.
Answer:
The electrical conductivity in metallic substances is due to free electrons while in ionic substances the conductivity is due to presence of ions.

Question 32.
Why are crystalline solids anisotropic?
Answer:
Crystalline solids show different values of their some properties like electrical conductivity, refractive index, thermal expansion etc. in different directions.

Question 33.
What is meant by ‘antiferromagnetism’?
Answer:
Antiferromagnetism : These substances possess zero net magnetic moment because of presence of equal number of electrons with opposite spins.

Question 34.
Write a distinguishing feature of a metallic solid compared to an ionic solid.
Answer:
Metallic solid conducts electricity in solid state but ionic solids do so only in molten state or in solution or metals conduct electricity through electrons and ionic substances through ions. Metallic solids are malleable and ductile while ionic solids are hard and brittle.

Question 35.
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids?
Answer:
Formula is X₂Y₃.

Question 36.
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3rd of tetrahedral voids?
Answer:
Y atoms are N (No. of tetrahedral voids are 2N), No. of tetrahedral voids occupied by X are
23 × 2N = 4N3
X : Y = 4N : 3N
Formula : X₄Y₃

Question 37.
What is the no. of atoms per unit cell (z) in a body-centred cubic structure?
Answer:
Contribution by the atoms present at eight comers = 8 × 18 = 1
Contribution by the atoms present at centre = 1
Total number of atoms present in unit cell = 1 + 1 = 2

Question 38.
What type of stoichiometric defect is shown by AgCl?
Answer:
AgCl shows Frenkel defect.

Question 39.
What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?
Answer:
Ferromagnetism is shown by a substance if magnetic moments of domains are arranged in same direction.

Question 40.
Give an example each of a molecular solid and an ionic solid.
Answer:
Molecular solid → Iodine (I₂)
Ionic solid → Sodium chloride (NaCl)