316217
The exhibition of highest coordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in \(\mathrm{MF}_{6}^{3-}\) ?
1 \(\mathrm{B}\)
2 \(\mathrm{Al}\)
3 \(\mathrm{Ga}\)
4 \(\mathrm{In}\)
Explanation:
Boron can show maximum coordination number of 4 . Thus, \({\text{B}}\) can not form complex of the type \(\mathrm{MF}_{6}^{3-}\).
CHXI11:THE P-BLOCK ELEMENTS
316218
Assertion : Trihalides of boron family fume in moist air. Reason : Trihalides of group-13 elements are hygroscopic.
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:
Trihalides of boron family undergo hydrolysis producing hydrogen halide due to which they fume in moist air. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316219
Assertion : \(\mathrm{SiF}_{6}^{2-}\) is known but \(\mathrm{SiCl}_{6}^{2-}\) is not. Reason : Size of fluorine is small and its lone pair of electrons interacts with d- orbitals of \({\text{Si }}\) strongly.
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 Both Assertion and Reason is Incorrect
Explanation:
\(\mathrm{SiF}_{6}^{2-}\) is known, as \(\mathrm{F}\) has small size and thus, the ion is quite stable unlike \(\mathrm{SiCl}_{6}^{2-}\) in which size of \(\mathrm{Cl}\) - atom is large which destabilises it.
AIIMS - 2005
CHXI11:THE P-BLOCK ELEMENTS
316220
Statement A : In trivalent state, most of the halides of group 13 elements are hydrolysed in water. Statement B : These are covalent in nature.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In trivalent state most of the halides of group 13 are hydrolysed in water as they are covalent in nature.
CHXI11:THE P-BLOCK ELEMENTS
316221
Assertion : \(\mathrm{BF}_{3}\) is weaker Lewis acid than \(\mathrm{BCl}_{3}\). Reason : \({\text{p}}\pi {\text{ - p}}\pi \) backbonding is stronger in \(\mathrm{BF}_{3}\) than in \(\mathrm{BCl}_{3}\).
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:
\(\mathrm{BF}_{3}\) is a weaker Lewis acid than \(\mathrm{BCl}_{3}\) due to the stronger electron-donating tendency (back bonding) of fluorine in \(\mathrm{BF}_{3}\) compared to chlorine in \(\mathrm{BCl}_{3}\). So availability of vacant orbital in \(\mathrm{BF}_{3}\) is less compared to \(\mathrm{BCl}_{3}\). So, option (1) is correct.
316217
The exhibition of highest coordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in \(\mathrm{MF}_{6}^{3-}\) ?
1 \(\mathrm{B}\)
2 \(\mathrm{Al}\)
3 \(\mathrm{Ga}\)
4 \(\mathrm{In}\)
Explanation:
Boron can show maximum coordination number of 4 . Thus, \({\text{B}}\) can not form complex of the type \(\mathrm{MF}_{6}^{3-}\).
CHXI11:THE P-BLOCK ELEMENTS
316218
Assertion : Trihalides of boron family fume in moist air. Reason : Trihalides of group-13 elements are hygroscopic.
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:
Trihalides of boron family undergo hydrolysis producing hydrogen halide due to which they fume in moist air. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316219
Assertion : \(\mathrm{SiF}_{6}^{2-}\) is known but \(\mathrm{SiCl}_{6}^{2-}\) is not. Reason : Size of fluorine is small and its lone pair of electrons interacts with d- orbitals of \({\text{Si }}\) strongly.
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 Both Assertion and Reason is Incorrect
Explanation:
\(\mathrm{SiF}_{6}^{2-}\) is known, as \(\mathrm{F}\) has small size and thus, the ion is quite stable unlike \(\mathrm{SiCl}_{6}^{2-}\) in which size of \(\mathrm{Cl}\) - atom is large which destabilises it.
AIIMS - 2005
CHXI11:THE P-BLOCK ELEMENTS
316220
Statement A : In trivalent state, most of the halides of group 13 elements are hydrolysed in water. Statement B : These are covalent in nature.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In trivalent state most of the halides of group 13 are hydrolysed in water as they are covalent in nature.
CHXI11:THE P-BLOCK ELEMENTS
316221
Assertion : \(\mathrm{BF}_{3}\) is weaker Lewis acid than \(\mathrm{BCl}_{3}\). Reason : \({\text{p}}\pi {\text{ - p}}\pi \) backbonding is stronger in \(\mathrm{BF}_{3}\) than in \(\mathrm{BCl}_{3}\).
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:
\(\mathrm{BF}_{3}\) is a weaker Lewis acid than \(\mathrm{BCl}_{3}\) due to the stronger electron-donating tendency (back bonding) of fluorine in \(\mathrm{BF}_{3}\) compared to chlorine in \(\mathrm{BCl}_{3}\). So availability of vacant orbital in \(\mathrm{BF}_{3}\) is less compared to \(\mathrm{BCl}_{3}\). So, option (1) is correct.
316217
The exhibition of highest coordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in \(\mathrm{MF}_{6}^{3-}\) ?
1 \(\mathrm{B}\)
2 \(\mathrm{Al}\)
3 \(\mathrm{Ga}\)
4 \(\mathrm{In}\)
Explanation:
Boron can show maximum coordination number of 4 . Thus, \({\text{B}}\) can not form complex of the type \(\mathrm{MF}_{6}^{3-}\).
CHXI11:THE P-BLOCK ELEMENTS
316218
Assertion : Trihalides of boron family fume in moist air. Reason : Trihalides of group-13 elements are hygroscopic.
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:
Trihalides of boron family undergo hydrolysis producing hydrogen halide due to which they fume in moist air. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316219
Assertion : \(\mathrm{SiF}_{6}^{2-}\) is known but \(\mathrm{SiCl}_{6}^{2-}\) is not. Reason : Size of fluorine is small and its lone pair of electrons interacts with d- orbitals of \({\text{Si }}\) strongly.
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 Both Assertion and Reason is Incorrect
Explanation:
\(\mathrm{SiF}_{6}^{2-}\) is known, as \(\mathrm{F}\) has small size and thus, the ion is quite stable unlike \(\mathrm{SiCl}_{6}^{2-}\) in which size of \(\mathrm{Cl}\) - atom is large which destabilises it.
AIIMS - 2005
CHXI11:THE P-BLOCK ELEMENTS
316220
Statement A : In trivalent state, most of the halides of group 13 elements are hydrolysed in water. Statement B : These are covalent in nature.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In trivalent state most of the halides of group 13 are hydrolysed in water as they are covalent in nature.
CHXI11:THE P-BLOCK ELEMENTS
316221
Assertion : \(\mathrm{BF}_{3}\) is weaker Lewis acid than \(\mathrm{BCl}_{3}\). Reason : \({\text{p}}\pi {\text{ - p}}\pi \) backbonding is stronger in \(\mathrm{BF}_{3}\) than in \(\mathrm{BCl}_{3}\).
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:
\(\mathrm{BF}_{3}\) is a weaker Lewis acid than \(\mathrm{BCl}_{3}\) due to the stronger electron-donating tendency (back bonding) of fluorine in \(\mathrm{BF}_{3}\) compared to chlorine in \(\mathrm{BCl}_{3}\). So availability of vacant orbital in \(\mathrm{BF}_{3}\) is less compared to \(\mathrm{BCl}_{3}\). So, option (1) is correct.
316217
The exhibition of highest coordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in \(\mathrm{MF}_{6}^{3-}\) ?
1 \(\mathrm{B}\)
2 \(\mathrm{Al}\)
3 \(\mathrm{Ga}\)
4 \(\mathrm{In}\)
Explanation:
Boron can show maximum coordination number of 4 . Thus, \({\text{B}}\) can not form complex of the type \(\mathrm{MF}_{6}^{3-}\).
CHXI11:THE P-BLOCK ELEMENTS
316218
Assertion : Trihalides of boron family fume in moist air. Reason : Trihalides of group-13 elements are hygroscopic.
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:
Trihalides of boron family undergo hydrolysis producing hydrogen halide due to which they fume in moist air. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316219
Assertion : \(\mathrm{SiF}_{6}^{2-}\) is known but \(\mathrm{SiCl}_{6}^{2-}\) is not. Reason : Size of fluorine is small and its lone pair of electrons interacts with d- orbitals of \({\text{Si }}\) strongly.
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 Both Assertion and Reason is Incorrect
Explanation:
\(\mathrm{SiF}_{6}^{2-}\) is known, as \(\mathrm{F}\) has small size and thus, the ion is quite stable unlike \(\mathrm{SiCl}_{6}^{2-}\) in which size of \(\mathrm{Cl}\) - atom is large which destabilises it.
AIIMS - 2005
CHXI11:THE P-BLOCK ELEMENTS
316220
Statement A : In trivalent state, most of the halides of group 13 elements are hydrolysed in water. Statement B : These are covalent in nature.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In trivalent state most of the halides of group 13 are hydrolysed in water as they are covalent in nature.
CHXI11:THE P-BLOCK ELEMENTS
316221
Assertion : \(\mathrm{BF}_{3}\) is weaker Lewis acid than \(\mathrm{BCl}_{3}\). Reason : \({\text{p}}\pi {\text{ - p}}\pi \) backbonding is stronger in \(\mathrm{BF}_{3}\) than in \(\mathrm{BCl}_{3}\).
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:
\(\mathrm{BF}_{3}\) is a weaker Lewis acid than \(\mathrm{BCl}_{3}\) due to the stronger electron-donating tendency (back bonding) of fluorine in \(\mathrm{BF}_{3}\) compared to chlorine in \(\mathrm{BCl}_{3}\). So availability of vacant orbital in \(\mathrm{BF}_{3}\) is less compared to \(\mathrm{BCl}_{3}\). So, option (1) is correct.
316217
The exhibition of highest coordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in \(\mathrm{MF}_{6}^{3-}\) ?
1 \(\mathrm{B}\)
2 \(\mathrm{Al}\)
3 \(\mathrm{Ga}\)
4 \(\mathrm{In}\)
Explanation:
Boron can show maximum coordination number of 4 . Thus, \({\text{B}}\) can not form complex of the type \(\mathrm{MF}_{6}^{3-}\).
CHXI11:THE P-BLOCK ELEMENTS
316218
Assertion : Trihalides of boron family fume in moist air. Reason : Trihalides of group-13 elements are hygroscopic.
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:
Trihalides of boron family undergo hydrolysis producing hydrogen halide due to which they fume in moist air. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316219
Assertion : \(\mathrm{SiF}_{6}^{2-}\) is known but \(\mathrm{SiCl}_{6}^{2-}\) is not. Reason : Size of fluorine is small and its lone pair of electrons interacts with d- orbitals of \({\text{Si }}\) strongly.
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 Both Assertion and Reason is Incorrect
Explanation:
\(\mathrm{SiF}_{6}^{2-}\) is known, as \(\mathrm{F}\) has small size and thus, the ion is quite stable unlike \(\mathrm{SiCl}_{6}^{2-}\) in which size of \(\mathrm{Cl}\) - atom is large which destabilises it.
AIIMS - 2005
CHXI11:THE P-BLOCK ELEMENTS
316220
Statement A : In trivalent state, most of the halides of group 13 elements are hydrolysed in water. Statement B : These are covalent in nature.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
In trivalent state most of the halides of group 13 are hydrolysed in water as they are covalent in nature.
CHXI11:THE P-BLOCK ELEMENTS
316221
Assertion : \(\mathrm{BF}_{3}\) is weaker Lewis acid than \(\mathrm{BCl}_{3}\). Reason : \({\text{p}}\pi {\text{ - p}}\pi \) backbonding is stronger in \(\mathrm{BF}_{3}\) than in \(\mathrm{BCl}_{3}\).
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:
\(\mathrm{BF}_{3}\) is a weaker Lewis acid than \(\mathrm{BCl}_{3}\) due to the stronger electron-donating tendency (back bonding) of fluorine in \(\mathrm{BF}_{3}\) compared to chlorine in \(\mathrm{BCl}_{3}\). So availability of vacant orbital in \(\mathrm{BF}_{3}\) is less compared to \(\mathrm{BCl}_{3}\). So, option (1) is correct.
