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question_answer1)
A solid has a structure in which \['W'\] atoms are located at the corners of a cubic lattice \['O'\] atoms at the centre of edges and \['Na'\] atoms at the centre of the cube. The formula for the compound is [KCET 1996]
A)
\[NaW{{O}_{2}}\] done
clear
B)
\[NaW{{O}_{3}}\] done
clear
C)
\[N{{a}_{2}}W{{O}_{3}}\] done
clear
D)
\[NaW{{O}_{4}}\] done
clear
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question_answer2)
Potassium crystallizes in a \[bcc\] lattice, hence the coordination number of potassium in potassium metal is [KCEE 1993]
A)
0 done
clear
B)
4 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer3)
Body centered cubic lattice has a coordination number of [AIIMS 1996; MP PMT 2002]
A)
4 done
clear
B)
8 done
clear
C)
12 done
clear
D)
6 done
clear
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question_answer4)
A compound is formed by elements \[A\]and \[B.\] This crystallizes in the cubic structure when atoms \[A\]are the corners of the cube and atoms \[B\] are at the centre of the body. The simplest formula of the compounds is [KCET 1993; CBSE PMT 2000; Kerala PMT 2002]
A)
\[AB\] done
clear
B)
\[A{{B}_{2}}\] done
clear
C)
\[{{A}_{2}}B\] done
clear
D)
\[A{{B}_{4}}\] done
clear
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question_answer5)
Coordination number for \[Cu\] is [AMU 1982]
A)
1 done
clear
B)
6 done
clear
C)
8 done
clear
D)
12 done
clear
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question_answer6)
In the crystal of \[CsCl,\] the nearest neighbours of each \[Cs\] ion are [MP PET 1993]
A)
Six chloride ions done
clear
B)
Eight chloride ions done
clear
C)
Six \[Cs\] ions done
clear
D)
Eight \[Cs\] ions done
clear
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question_answer7)
In a cubic structure of compound which is made from X and Y, where X atoms are at the corners of the cube and Y at the face centres of the cube. The molecular formula of the compound is [AIIMS 2000]
A)
\[{{X}_{2}}Y\] done
clear
B)
\[{{X}_{3}}Y\] done
clear
C)
\[X{{Y}_{2}}\] done
clear
D)
\[X{{Y}_{3}}\] done
clear
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question_answer8)
Ferrous oxide has a cubic structure and each edge of the unit cell is 5.0 Å. Assuming density of the oxide as \[4.0g-c{{m}^{-3}}\], then the number of \[F{{e}^{2+}}\] and \[{{O}^{2-}}\] ions present in each unit cell will be [MP PET 2000]
A)
Four \[F{{e}^{2+}}\] and four \[{{O}^{2-}}\] done
clear
B)
Two \[F{{e}^{2+}}\] and four \[{{O}^{2-}}\] done
clear
C)
Four \[F{{e}^{2+}}\] and two \[{{O}^{2-}}\] done
clear
D)
Three \[F{{e}^{2+}}\] and three \[{{O}^{2-}}\] done
clear
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question_answer9)
Which of the following statements is not true about \[NaCl\] structure [DCE 2001]
A)
\[C{{l}^{-}}\]ions are in fcc arrangement done
clear
B)
\[N{{a}^{+}}\]ions has coordination number 4 done
clear
C)
\[C{{l}^{-}}\]ions has coordination number 6 done
clear
D)
Each unit cell contains \[4NaCl\] molecules done
clear
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question_answer10)
In \[CsCl\] structure, the coordination number of \[C{{s}^{+}}\] is [MP PMT 2001]
A)
Equal to that of \[C{{l}^{-}}\], that is 6 done
clear
B)
Equal to that of \[C{{l}^{-}}\], that is 8 done
clear
C)
Not equal to that of \[C{{l}^{-}}\], that is 6 done
clear
D)
Not equal to that of \[C{{l}^{-}}\], that is 8 done
clear
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question_answer11)
In a solid 'AB' having the \[NaCl\] structure, 'A' atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is [IIT Screening 2001]
A)
\[A{{B}_{2}}\] done
clear
B)
\[{{A}_{2}}B\] done
clear
C)
\[{{A}_{4}}{{B}_{3}}\] done
clear
D)
\[{{A}_{3}}{{B}_{4}}\] done
clear
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question_answer12)
In solid \[CsCl\] each \[Cl\] is closely packed with how many \[Cs\] [MP PET 2003]
A)
8 done
clear
B)
6 done
clear
C)
10 done
clear
D)
2 done
clear
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question_answer13)
In \[{{A}^{+}}{{B}^{-}}\]ionic compound, radii of \[{{A}^{+}}\]and \[{{B}^{-}}\]ions are \[180\,\,pm\] and \[187\,\,pm\] respectively. The crystal structure of this compound will be
A)
\[NaCl\] type done
clear
B)
\[CsCl\] type done
clear
C)
\[ZnS\] type done
clear
D)
Similar to diamond done
clear
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question_answer14)
In which of the following substances the carbon atom is arranged in a regular tetrahedral structure [NCERT 1978]
A)
Diamond done
clear
B)
Benzene done
clear
C)
Graphite done
clear
D)
Carbon black done
clear
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question_answer15)
The coordination number of a metal crystallizing in a hexagonal close packed structure is [NCERT 1978; IIT 1999]
A)
4 done
clear
B)
12 done
clear
C)
8 done
clear
D)
6 done
clear
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question_answer16)
The structure of \[MgO\] is similar to \[NaCl.\] What would be the coordination number of magnesium
A)
2 done
clear
B)
4 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer17)
How many chloride ions are there around sodium ion in sodium chloride crystal [NCERT 1979, 80; CPMT 1988; BHU 1982, 87; MP PET 1995, 99]
A)
3 done
clear
B)
8 done
clear
C)
4 done
clear
D)
6 done
clear
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question_answer18)
Most crystals show good cleavage because their atoms, ions or molecules are [CBSE PMT 1991]
A)
Weakly bonded together done
clear
B)
Strongly bonded together done
clear
C)
Spherically symmetrical done
clear
D)
Arranged in planes done
clear
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question_answer19)
An example of a non-stoichiometric compound is [NCERT 1983]
A)
\[A{{l}_{2}}{{O}_{3}}\] done
clear
B)
\[F{{e}_{3}}{{O}_{4}}\] done
clear
C)
\[Ni{{O}_{2}}\] done
clear
D)
\[PbO\] done
clear
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question_answer20)
If the radius ratio is in the range of \[0.731-1,\] then the coordination number will be
A)
2 done
clear
B)
4 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer21)
If the radius ratio is in the range of \[0.414-0.732,\] then the coordination number will be
A)
2 done
clear
B)
4 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer22)
What is the coordination number of sodium in \[N{{a}_{2}}O\] [AIIMS 2003]
A)
6 done
clear
B)
4 done
clear
C)
8 done
clear
D)
2 done
clear
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question_answer23)
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is [KCET 2003]
A)
6 done
clear
B)
8 done
clear
C)
1 done
clear
D)
4 done
clear
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question_answer24)
In \[CsCl\] lattice the coordination number of \[C{{s}^{+}}\] ion is
A)
2 done
clear
B)
4 done
clear
C)
8 done
clear
D)
12 done
clear
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question_answer25)
Crystal structure of \[NaCl\] is [NCERT 1982; BHU 1995]
A)
\[fcc\] done
clear
B)
\[bcc\] done
clear
C)
Both A and B done
clear
D)
None done
clear
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question_answer26)
In \[NaCl\] lattice the coordination number of \[C{{l}^{-}}\] ion is
A)
2 done
clear
B)
4 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer27)
In zinc blende structure the coordination number of \[Z{{n}^{2+}}\] ion is
A)
2 done
clear
B)
4 done
clear
C)
6 done
clear
D)
8 done
clear
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question_answer28)
Coordination number of \[N{{a}^{+}}\] ion in rock salt is [BVP 2004]
A)
12 done
clear
B)
4 done
clear
C)
8 done
clear
D)
6 done
clear
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question_answer29)
The number of \[C{{l}^{-}}\] ions around one \[N{{a}^{+}}\] in \[NaCl\] crystal lattice is [MP PET 1996; BVP 2004]
A)
12 done
clear
B)
4 done
clear
C)
8 done
clear
D)
6 done
clear
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question_answer30)
The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is [Pb. PMT 2004]
A)
6 done
clear
B)
3 done
clear
C)
2 done
clear
D)
1 done
clear
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question_answer31)
The coordination number of a metal crystallizing in a hexagonal close packed chep structure is [MP PMT 2004]
A)
12 done
clear
B)
8 done
clear
C)
4 done
clear
D)
6 done
clear
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question_answer32)
Which of the following statement(s) is(are) correct [IIT 1998]
A)
The coordination number of each type of ion in \[CsCl\] crystal is 8 done
clear
B)
A metal that crystallizes in \[bcc\] structure has a coordination number of 12 done
clear
C)
A unit cell of an ionic crystal shares some of its ions with other unit cells done
clear
D)
The length of the unit cell in \[NaCl\] is 552 \[pm\] \[({{r}_{N{{a}^{+}}}}=95\,\,pm;\,\,\,{{r}_{C{{l}^{-}}}}=181\,\,pm)\] done
clear
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question_answer33)
The co-ordination number of \[N{{a}^{+}}\] in \[NaCl\] is [Orrisa JEE 2005]
A)
6 done
clear
B)
8 done
clear
C)
4 done
clear
D)
1 done
clear
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question_answer34)
In the calcium fluoride structure the co-ordination number of the cation and anions are respectively [J & K 2005]
A)
6, 6 done
clear
B)
8, 4 done
clear
C)
4, 4 done
clear
D)
4, 8 done
clear
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