Solid State MCQ - 1 (Advanced)
25 Questions MCQ Test Chemistry for JEE Advanced | Solid State MCQ - 1 (Advanced)
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(A) 6 Cs+ ion second nearest neighbour
(D) True
The compound having general formula M2+ Fe2O42_ are called as :
it will be ferrite and ferrimagnetic substance
Which of the following statement is/are incorrect in the rock-salt structure if an ionic compounds ?
Coordination no. of cation = 6
coordination no of anion = 6
r+ + r– = a/2
(95 + 181)= a/2
⇒ a = 276 × 2
a = 552 pm
Passage
In two dimension, there are square close packing & Hexagonal close packing. In three dimension, however threre are HCP, BCC and CCP arrangement. Unoccupied space in packing is known as void which may be octahedral, tetrahedral or cubic void and formation of void depends on atomic or ionic arrangment in crystal.
Q.
Empty space left in HCP in three dimension is
H C P
Pacling efficlency = 74%
empty space = 100 – 74%
ES=26%
In two dimension, there are square close packing & Hexagonal close packing. In three dimension, however threre are HCP, BCC and CCP arrangement. Unoccupied space in packing is known as void which may be octahedral, tetrahedral or cubic void and formation of void depends on atomic or ionic arrangment in crystal.
Q.
In ccp, ratio of no. of atoms to no. of tetrahedral void is -
In any structure if number of atom is Z
so no. of tetrahedral voids = 2 Z
in ccp Z = 4
so letrahedral void = 8
In two dimension, there are square close packing & Hexagonal close packing. In three dimension, however threre are HCP, BCC and CCP arrangement. Unoccupied space in packing is known as void which may be octahedral, tetrahedral or cubic void and formation of void depends on atomic or ionic arrangment in crystal.
Q.
Size order of octahedral, tetrahedral & cubic void is -
For B.C.C.
for octahedral.
for tetrahedral
so, cubic > octahedral > tetrahedral
In two dimension, there are square close packing & Hexagonal close packing. In three dimension, however threre are HCP, BCC and CCP arrangement. Unoccupied space in packing is known as void which may be octahedral, tetrahedral or cubic void and formation of void depends on atomic or ionic arrangment in crystal.
Q.
In certain metallic oxide, metal M occupy HCP lattice & O_2 occupy 2/3rd of octahedral void, formula of crystal is -
M— H.C.P = 6
M6O4
M3O2
Statement - I. Due to Frenkel defect the density of solid decrease.
Statement - II. In Frenkel defect cation or anion is present at interstitial site leaving lattice sites vacant.
A Frenkel defect is a type of defect in crystalline solids wherein an atom is displaced from its lattice position to an interstitial site, creating a vacancy at the original site and an interstitial defect at the new location within the same element without any changes in chemical properties.
No cation are anion are leaving the crystal. Only the cation is moving from one place to another place within the crystal. So the density of crystalline solid will not change.
Statement - I. By increasing the temperature C.N. of CsCl changes from 8 : 8 to 6 : 6.
Statement - II. Temperature also influences the C.N. of solid.
CSCl has b.c.c
by increasing temperature it will become octahedral type and it C.N. will be 6
Staterment - I is correct and statement II is correct explanation of I So answer will be (A)
Statement - I. Solid having more F-centers have intense color.
Statement - II. Excess of Na+ in NaCl solid having F-centers make it appears to pink.
statment I is correct
because F- certres are the electron occupied at the place of anion which is released by metal thus it will give intense colour whereas statement II is wrong
Statement - I. Close packing of atoms in cubic structure is in order of : fcc > bcc > sc
Statement - II. Packing density = 
F.C.C. = 74%
B.C.C. = 68%
SC= 52%
So FCC > BCC > SC
So statement I is correct
Statement II correct.
and correct explanation of I
Statement - I. Pure NaCl is diamagnetic in nature.
Statement - II. In NaCl, Na+ occupy octahedral voids.
Statement I - No unpaired electron in NaCl so diamagnetic
Statemetn II - is correct but not correct exblanation of I so
State whether the following statements are True or False :
Coluor of LiCl due to metal excess defect is pink.
In case we caused oping lithium goes in interstitiel site whcih cause pink colour True.
State whether the following statements are True or False :
The imperfection in crystal increases with increases in temperature.
As we increase the temperature effect will also increase.
State whether the following statements are True or False :
FCC structure possesses the most close packing of atoms in it.
FCC and ccp has the highest packing efficiency
State whether the following statements are True or False :
Increase in pressure in ionic solids may decrease co-ordination No.
Increase in pressure increase coordination number
State whether the following statements are True or False :
The amorphous solids are isotropic.
The amporsphous solid are isotropic.
Match the type of packing given in Column-I with the items given in Column-II.
Coordination number is 4 in square close packing in two dimensions. Two dimensional hexagonal close packing contains triangular voids. Three dimensional hexagonal close packing have ABAB arrangement whereas ccp have ABCAABC type arrangement.
A cubic solid is made up of two elements A and B. Atoms B are at the corners of the cube and A at the body centre. What is the formula of compound.
A = 1 (Body center)
formula = AB
A compound alloy of gold and copper crystallizes in a cubic lattice in which gold occupy that lattice point at corners of the cube and copper atom occupy the centres of each of the cube faces. What is the formula of this compound.
Formula = AuCu3
A cubic solid is made by atoms A forming close pack arrangement, B occupying one. Fourth of tetrahedral void and C occupying half of the octahedral voids. What is the formula of compound.
= 2
C = Total no. of octahedral voids / 2 no. of octahedral voids (effective) = 1 + 12 × 1/4 = 4
Bodycenter edgecentre C = 4/2 = 2
formula = A4B2C2
What is the percent by mass of titanium in rutile, a mineral that contain Titanium and oxygen, if structure can be described as a closet packed array of oxide ions, with titanium in one half of the octahedral holes. What is the oxidation number of titanium ?
TiO2 formula
Ti (At mass) = 47.88
Spinel is a important class of oxides consisting of two types of metal ions with the oxide ions arranged in CCP pattern. The normal spinel has one-eight of the tetrahedral holes occupied by one type of metal ion and one half of the octahedral hole occupied by another type of metal ion. Such a spinel is formed by Zn2+, Al3+ and O2-, with Zn2+ in the tetrahedral holes. Give the formulae of spinel.
Edge length, density and number of atoms per unit cell
Zn2+ = 8/8 = 1
Al3+ = 4/2 = 2
O2– = CCP (4)
ZnAl2O4
O2– = CCP arrangment (1+3) = 4
Iron occurs as bcc as well as fcc unit cell. If the effective radius of an atom of iron is 124 pm. Compute the density of iron in both these structures.
In bcc z = 2
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