Boron and its Compounds
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CHXI11:THE P-BLOCK ELEMENTS

316045 The strongest Lewis acid among boron halides is

1 \(\mathrm{BBr}_{3}\)
2 \(\mathrm{BCl}_{3}\)
3 \(\mathrm{BI}_{3}\)
4 \(\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316046 In \({\text{B}}{{\text{F}}_{\text{3}}}\), the \(\mathrm{B}-\mathrm{F}\) bond length is \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \), when \(\mathrm{BF}_{3}\) is allowed to be treated with \(\mathrm{Me}_{3} \mathrm{~N}\), it forms an adduct, \(\mathrm{Me}_{3} \mathrm{~N} \rightarrow \mathrm{BF}_{3}\), The bond length of \(\mathrm{B}\) \(\mathrm{F}\) in the adduct is:

1 Greater than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
2 Smaller than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
3 Equal to \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316047 The power of halides of Boron to act as Lewis acids decreases in the order of

1 \(\mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3}\)
2 \(\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}\)
3 \(\mathrm{BCl}_{3}>\mathrm{BF}_{3}>\mathrm{BBr}_{3}\)
4 \(\mathrm{BCl}_{3}>\mathrm{BBr}_{3}>\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316048 In \(B F_{3}\)

1 B-F bond has some double bond character and this bond is delocalised
2 All the B-F bonds are single covalent in nature
3 Bond energy and bond-length of B-F bond indicate its single bond character
4 All the bonds are ionic
CHXI11:THE P-BLOCK ELEMENTS

316049 The correct statement is

1 \({\text{B}}{{\text{I}}_{\text{3}}}\) is the weakest Lewis acid among the boron halides
2 there is minimum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\)
3 \(\mathrm{BF}_{3}\) is the strongest Lewis acid among the other boron halides
4 there is maximum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\).
KCET - 2015
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CHXI11:THE P-BLOCK ELEMENTS

316045 The strongest Lewis acid among boron halides is

1 \(\mathrm{BBr}_{3}\)
2 \(\mathrm{BCl}_{3}\)
3 \(\mathrm{BI}_{3}\)
4 \(\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316046 In \({\text{B}}{{\text{F}}_{\text{3}}}\), the \(\mathrm{B}-\mathrm{F}\) bond length is \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \), when \(\mathrm{BF}_{3}\) is allowed to be treated with \(\mathrm{Me}_{3} \mathrm{~N}\), it forms an adduct, \(\mathrm{Me}_{3} \mathrm{~N} \rightarrow \mathrm{BF}_{3}\), The bond length of \(\mathrm{B}\) \(\mathrm{F}\) in the adduct is:

1 Greater than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
2 Smaller than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
3 Equal to \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316047 The power of halides of Boron to act as Lewis acids decreases in the order of

1 \(\mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3}\)
2 \(\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}\)
3 \(\mathrm{BCl}_{3}>\mathrm{BF}_{3}>\mathrm{BBr}_{3}\)
4 \(\mathrm{BCl}_{3}>\mathrm{BBr}_{3}>\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316048 In \(B F_{3}\)

1 B-F bond has some double bond character and this bond is delocalised
2 All the B-F bonds are single covalent in nature
3 Bond energy and bond-length of B-F bond indicate its single bond character
4 All the bonds are ionic
CHXI11:THE P-BLOCK ELEMENTS

316049 The correct statement is

1 \({\text{B}}{{\text{I}}_{\text{3}}}\) is the weakest Lewis acid among the boron halides
2 there is minimum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\)
3 \(\mathrm{BF}_{3}\) is the strongest Lewis acid among the other boron halides
4 there is maximum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\).
KCET - 2015
For More Updates join with Us
CHXI11:THE P-BLOCK ELEMENTS

316045 The strongest Lewis acid among boron halides is

1 \(\mathrm{BBr}_{3}\)
2 \(\mathrm{BCl}_{3}\)
3 \(\mathrm{BI}_{3}\)
4 \(\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316046 In \({\text{B}}{{\text{F}}_{\text{3}}}\), the \(\mathrm{B}-\mathrm{F}\) bond length is \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \), when \(\mathrm{BF}_{3}\) is allowed to be treated with \(\mathrm{Me}_{3} \mathrm{~N}\), it forms an adduct, \(\mathrm{Me}_{3} \mathrm{~N} \rightarrow \mathrm{BF}_{3}\), The bond length of \(\mathrm{B}\) \(\mathrm{F}\) in the adduct is:

1 Greater than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
2 Smaller than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
3 Equal to \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316047 The power of halides of Boron to act as Lewis acids decreases in the order of

1 \(\mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3}\)
2 \(\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}\)
3 \(\mathrm{BCl}_{3}>\mathrm{BF}_{3}>\mathrm{BBr}_{3}\)
4 \(\mathrm{BCl}_{3}>\mathrm{BBr}_{3}>\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316048 In \(B F_{3}\)

1 B-F bond has some double bond character and this bond is delocalised
2 All the B-F bonds are single covalent in nature
3 Bond energy and bond-length of B-F bond indicate its single bond character
4 All the bonds are ionic
CHXI11:THE P-BLOCK ELEMENTS

316049 The correct statement is

1 \({\text{B}}{{\text{I}}_{\text{3}}}\) is the weakest Lewis acid among the boron halides
2 there is minimum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\)
3 \(\mathrm{BF}_{3}\) is the strongest Lewis acid among the other boron halides
4 there is maximum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\).
KCET - 2015
NEET DIGITAL LIBRARY
CHXI11:THE P-BLOCK ELEMENTS

316045 The strongest Lewis acid among boron halides is

1 \(\mathrm{BBr}_{3}\)
2 \(\mathrm{BCl}_{3}\)
3 \(\mathrm{BI}_{3}\)
4 \(\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316046 In \({\text{B}}{{\text{F}}_{\text{3}}}\), the \(\mathrm{B}-\mathrm{F}\) bond length is \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \), when \(\mathrm{BF}_{3}\) is allowed to be treated with \(\mathrm{Me}_{3} \mathrm{~N}\), it forms an adduct, \(\mathrm{Me}_{3} \mathrm{~N} \rightarrow \mathrm{BF}_{3}\), The bond length of \(\mathrm{B}\) \(\mathrm{F}\) in the adduct is:

1 Greater than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
2 Smaller than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
3 Equal to \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316047 The power of halides of Boron to act as Lewis acids decreases in the order of

1 \(\mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3}\)
2 \(\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}\)
3 \(\mathrm{BCl}_{3}>\mathrm{BF}_{3}>\mathrm{BBr}_{3}\)
4 \(\mathrm{BCl}_{3}>\mathrm{BBr}_{3}>\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316048 In \(B F_{3}\)

1 B-F bond has some double bond character and this bond is delocalised
2 All the B-F bonds are single covalent in nature
3 Bond energy and bond-length of B-F bond indicate its single bond character
4 All the bonds are ionic
CHXI11:THE P-BLOCK ELEMENTS

316049 The correct statement is

1 \({\text{B}}{{\text{I}}_{\text{3}}}\) is the weakest Lewis acid among the boron halides
2 there is minimum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\)
3 \(\mathrm{BF}_{3}\) is the strongest Lewis acid among the other boron halides
4 there is maximum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\).
KCET - 2015
Join With Us for More Updates
CHXI11:THE P-BLOCK ELEMENTS

316045 The strongest Lewis acid among boron halides is

1 \(\mathrm{BBr}_{3}\)
2 \(\mathrm{BCl}_{3}\)
3 \(\mathrm{BI}_{3}\)
4 \(\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316046 In \({\text{B}}{{\text{F}}_{\text{3}}}\), the \(\mathrm{B}-\mathrm{F}\) bond length is \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \), when \(\mathrm{BF}_{3}\) is allowed to be treated with \(\mathrm{Me}_{3} \mathrm{~N}\), it forms an adduct, \(\mathrm{Me}_{3} \mathrm{~N} \rightarrow \mathrm{BF}_{3}\), The bond length of \(\mathrm{B}\) \(\mathrm{F}\) in the adduct is:

1 Greater than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
2 Smaller than \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
3 Equal to \({\rm{1}}{\rm{.30}}\mathop {\rm{A}}\limits^{\rm{o}} \)
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316047 The power of halides of Boron to act as Lewis acids decreases in the order of

1 \(\mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3}\)
2 \(\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}\)
3 \(\mathrm{BCl}_{3}>\mathrm{BF}_{3}>\mathrm{BBr}_{3}\)
4 \(\mathrm{BCl}_{3}>\mathrm{BBr}_{3}>\mathrm{BF}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS

316048 In \(B F_{3}\)

1 B-F bond has some double bond character and this bond is delocalised
2 All the B-F bonds are single covalent in nature
3 Bond energy and bond-length of B-F bond indicate its single bond character
4 All the bonds are ionic
CHXI11:THE P-BLOCK ELEMENTS

316049 The correct statement is

1 \({\text{B}}{{\text{I}}_{\text{3}}}\) is the weakest Lewis acid among the boron halides
2 there is minimum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\)
3 \(\mathrm{BF}_{3}\) is the strongest Lewis acid among the other boron halides
4 there is maximum \({\text{p}}\pi {\text{ - p}}\pi \) back bonding in \(\mathrm{BF}_{3}\).
KCET - 2015