NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII01:THE SOLID STATE
318947
In the calcium fluoride structure, the coordination number of the cation and anion are respectively,
1 6,6
2 8,4
3 4,4
4 4,8
Explanation:
In calcium fluoride structure, the \(\mathrm{Ca}^{2+}\) ions are arranged in ccp/fcc (cubic closed packed) arrangement, \(i.e\). \(\mathrm{Ca}^{2+}\) ions are present at all corners and the centre of each face of the cube. The fluoride ions occupy all the tetrahedral sites. This is \(8: 4\) arrangement, i.e. each \(\mathrm{Ca}^{2+}\) ion is surrounded by \(8 \mathrm{~F}^{-}\)ions and each \(\mathrm{F}^{-}\) ion by four \(\mathrm{Ca}^{2+}\) ions.
CHXII01:THE SOLID STATE
318948
Assertion : The co-ordination number of \(\mathrm{CaF}_{2}\) is \(8: 4\). Reason : \(\mathrm{Ca}^{2+}\) ions occupy ccp lattice while \(\mathrm{F}^{-}\)ions occupy all the tetrahedral voids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
In \(\mathrm{CaF}_{2}, \mathrm{~F}\) - ions occupy all tetrahedral voids.
CHXII01:THE SOLID STATE
318949
The structure of \(\mathrm{MgO}\) is similar to \(\mathrm{NaCl}\). What would be the coordination number of magnesium?
1 2
2 4
3 6
4 8
Explanation:
In \(\mathrm{NaCl}\), the C.N. of cation and anion are 6 and 6. So, the C.N. of \(\mathrm{Mg}\) is 6.
CHXII01:THE SOLID STATE
318950
In a solid \(\mathrm{AB}\) having the \(\mathrm{NaCl}\) structure, \(A\) atoms along occupy the corners of the cubic unit cell. If all the face-centered atoms one of the axes are removed, then the resultant stoichiometry of the solid is:
1 \(A B_{2}\)
2 \(A_{2} B\)
3 \(A_{4} B_{3}\)
4 \(A_{3} B_{4}\)
Explanation:
Effective number of ' \(A\) ' atoms \(=\left(8 \times \dfrac{1}{8}\right)+\left(4 \times \dfrac{1}{2}\right)=3\) Effective number of ' \(B\) ' atoms \(=\left(12 \times \dfrac{1}{4}\right)+1=4\) Formula of the solid \(=A_{3} B_{4}\)
318947
In the calcium fluoride structure, the coordination number of the cation and anion are respectively,
1 6,6
2 8,4
3 4,4
4 4,8
Explanation:
In calcium fluoride structure, the \(\mathrm{Ca}^{2+}\) ions are arranged in ccp/fcc (cubic closed packed) arrangement, \(i.e\). \(\mathrm{Ca}^{2+}\) ions are present at all corners and the centre of each face of the cube. The fluoride ions occupy all the tetrahedral sites. This is \(8: 4\) arrangement, i.e. each \(\mathrm{Ca}^{2+}\) ion is surrounded by \(8 \mathrm{~F}^{-}\)ions and each \(\mathrm{F}^{-}\) ion by four \(\mathrm{Ca}^{2+}\) ions.
CHXII01:THE SOLID STATE
318948
Assertion : The co-ordination number of \(\mathrm{CaF}_{2}\) is \(8: 4\). Reason : \(\mathrm{Ca}^{2+}\) ions occupy ccp lattice while \(\mathrm{F}^{-}\)ions occupy all the tetrahedral voids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
In \(\mathrm{CaF}_{2}, \mathrm{~F}\) - ions occupy all tetrahedral voids.
CHXII01:THE SOLID STATE
318949
The structure of \(\mathrm{MgO}\) is similar to \(\mathrm{NaCl}\). What would be the coordination number of magnesium?
1 2
2 4
3 6
4 8
Explanation:
In \(\mathrm{NaCl}\), the C.N. of cation and anion are 6 and 6. So, the C.N. of \(\mathrm{Mg}\) is 6.
CHXII01:THE SOLID STATE
318950
In a solid \(\mathrm{AB}\) having the \(\mathrm{NaCl}\) structure, \(A\) atoms along occupy the corners of the cubic unit cell. If all the face-centered atoms one of the axes are removed, then the resultant stoichiometry of the solid is:
1 \(A B_{2}\)
2 \(A_{2} B\)
3 \(A_{4} B_{3}\)
4 \(A_{3} B_{4}\)
Explanation:
Effective number of ' \(A\) ' atoms \(=\left(8 \times \dfrac{1}{8}\right)+\left(4 \times \dfrac{1}{2}\right)=3\) Effective number of ' \(B\) ' atoms \(=\left(12 \times \dfrac{1}{4}\right)+1=4\) Formula of the solid \(=A_{3} B_{4}\)
318947
In the calcium fluoride structure, the coordination number of the cation and anion are respectively,
1 6,6
2 8,4
3 4,4
4 4,8
Explanation:
In calcium fluoride structure, the \(\mathrm{Ca}^{2+}\) ions are arranged in ccp/fcc (cubic closed packed) arrangement, \(i.e\). \(\mathrm{Ca}^{2+}\) ions are present at all corners and the centre of each face of the cube. The fluoride ions occupy all the tetrahedral sites. This is \(8: 4\) arrangement, i.e. each \(\mathrm{Ca}^{2+}\) ion is surrounded by \(8 \mathrm{~F}^{-}\)ions and each \(\mathrm{F}^{-}\) ion by four \(\mathrm{Ca}^{2+}\) ions.
CHXII01:THE SOLID STATE
318948
Assertion : The co-ordination number of \(\mathrm{CaF}_{2}\) is \(8: 4\). Reason : \(\mathrm{Ca}^{2+}\) ions occupy ccp lattice while \(\mathrm{F}^{-}\)ions occupy all the tetrahedral voids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
In \(\mathrm{CaF}_{2}, \mathrm{~F}\) - ions occupy all tetrahedral voids.
CHXII01:THE SOLID STATE
318949
The structure of \(\mathrm{MgO}\) is similar to \(\mathrm{NaCl}\). What would be the coordination number of magnesium?
1 2
2 4
3 6
4 8
Explanation:
In \(\mathrm{NaCl}\), the C.N. of cation and anion are 6 and 6. So, the C.N. of \(\mathrm{Mg}\) is 6.
CHXII01:THE SOLID STATE
318950
In a solid \(\mathrm{AB}\) having the \(\mathrm{NaCl}\) structure, \(A\) atoms along occupy the corners of the cubic unit cell. If all the face-centered atoms one of the axes are removed, then the resultant stoichiometry of the solid is:
1 \(A B_{2}\)
2 \(A_{2} B\)
3 \(A_{4} B_{3}\)
4 \(A_{3} B_{4}\)
Explanation:
Effective number of ' \(A\) ' atoms \(=\left(8 \times \dfrac{1}{8}\right)+\left(4 \times \dfrac{1}{2}\right)=3\) Effective number of ' \(B\) ' atoms \(=\left(12 \times \dfrac{1}{4}\right)+1=4\) Formula of the solid \(=A_{3} B_{4}\)
318947
In the calcium fluoride structure, the coordination number of the cation and anion are respectively,
1 6,6
2 8,4
3 4,4
4 4,8
Explanation:
In calcium fluoride structure, the \(\mathrm{Ca}^{2+}\) ions are arranged in ccp/fcc (cubic closed packed) arrangement, \(i.e\). \(\mathrm{Ca}^{2+}\) ions are present at all corners and the centre of each face of the cube. The fluoride ions occupy all the tetrahedral sites. This is \(8: 4\) arrangement, i.e. each \(\mathrm{Ca}^{2+}\) ion is surrounded by \(8 \mathrm{~F}^{-}\)ions and each \(\mathrm{F}^{-}\) ion by four \(\mathrm{Ca}^{2+}\) ions.
CHXII01:THE SOLID STATE
318948
Assertion : The co-ordination number of \(\mathrm{CaF}_{2}\) is \(8: 4\). Reason : \(\mathrm{Ca}^{2+}\) ions occupy ccp lattice while \(\mathrm{F}^{-}\)ions occupy all the tetrahedral voids.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
In \(\mathrm{CaF}_{2}, \mathrm{~F}\) - ions occupy all tetrahedral voids.
CHXII01:THE SOLID STATE
318949
The structure of \(\mathrm{MgO}\) is similar to \(\mathrm{NaCl}\). What would be the coordination number of magnesium?
1 2
2 4
3 6
4 8
Explanation:
In \(\mathrm{NaCl}\), the C.N. of cation and anion are 6 and 6. So, the C.N. of \(\mathrm{Mg}\) is 6.
CHXII01:THE SOLID STATE
318950
In a solid \(\mathrm{AB}\) having the \(\mathrm{NaCl}\) structure, \(A\) atoms along occupy the corners of the cubic unit cell. If all the face-centered atoms one of the axes are removed, then the resultant stoichiometry of the solid is:
1 \(A B_{2}\)
2 \(A_{2} B\)
3 \(A_{4} B_{3}\)
4 \(A_{3} B_{4}\)
Explanation:
Effective number of ' \(A\) ' atoms \(=\left(8 \times \dfrac{1}{8}\right)+\left(4 \times \dfrac{1}{2}\right)=3\) Effective number of ' \(B\) ' atoms \(=\left(12 \times \dfrac{1}{4}\right)+1=4\) Formula of the solid \(=A_{3} B_{4}\)
