190076
The Lewis acid character of boron tri halides follows the order:
1 \(BBr _3 > BI _3 > BCI _3 > BF _3\)
2 \(BCl _3 > BF _3 > BBr _3 > BI _3\)
3 \(BF _3 > BCl _3 > BBr _3 > BI _3\)
4 \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Explanation:
Extent of back bonding, reduces down the group leading to more Lewis acidic strength \(BF _3 > BCl _3 > BBr _3 > BI _3\) (extent of back bonding) \((2 p-2 p)(2 p-3 p)(2 p-4 p)(2 p-5 p)\) \(BF _3 < BCl _3 < BBr _3 < BI _3\) (lewis acidic nature)
11. THE P-BLOCK ELEMENTS
190077
The correct order of bond enthalpy \(\left( kJ\,mol ^{-1}\right)\) is :
1 \(Si - Si > C - C > Sn - Sn > Ge - Ge\)
2 \(Si - Si > C - C > Ge - Ge > Sn - Sn\)
3 \(C - C > Si - Si > Sn - Sn > Ge - Ge\)
4 \(C - C > Si - Si > Ge - Ge > Sn - Sn\)
Explanation:
(Bond enthalpy order \(C - C > Si - Si > Ge - Ge > Sn - Sn )\)
11. THE P-BLOCK ELEMENTS
190078
For compound having the formula \(GaAlCl _4\), the correct option from the following is
1 \(Ga\) is more electronegative than \(Al\) and is present as a cationic part of the salt \(GaAlCl _4\)
2 Oxidation state of \(Ga\) in the salt \(GaAlC _4\) is \(+3\).
3 \(Cl\) forms bond with both \(Al\) and \(Ga\) in \(GaAlCl _4\)
4 \(Ga\) is coordinated with \(Cl\) in \(GaAlCl _4\)
Explanation:
Gallous tetrachloro aluminate \(Ga ^{+} AlCl _4^{-}\) \(2 Ga + Ga ^{+} GaCl _4^{-}+2 Al _2 Cl _6 \stackrel{190^{\circ}}{\longrightarrow} 4 Ga ^{+} AlCl _4^{-}\) Ga is cationic part of salt \(GaAlCl _4\).
11. THE P-BLOCK ELEMENTS
190081
\(Be ( OH )_2\) react with \(Sr ( OH )_2\) to yield an ionic salt. Choose the incorrect option related to this reaction from the following:
1 Be is tetrahedrally coordinated in the ionic salt.
2 The reaction is an example of acid - base neutralization reaction.
3 Both \(Sr\) and \(Be\) elements are present in the ionic salt.
4 The elements \(Be\) is present in the cationic part of the ionic salt.
Explanation:
\(Be ( OH )_2\) is amphoteric in nature. \(Sr ( OH )_2\) is basic in nature. These two undergo acid - base reaction to form a salt. \(Be ( OH )_2+ Sr ( OH )_2 \rightarrow Sr \left[ Be ( OH )_4\right]\) (salt)
190076
The Lewis acid character of boron tri halides follows the order:
1 \(BBr _3 > BI _3 > BCI _3 > BF _3\)
2 \(BCl _3 > BF _3 > BBr _3 > BI _3\)
3 \(BF _3 > BCl _3 > BBr _3 > BI _3\)
4 \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Explanation:
Extent of back bonding, reduces down the group leading to more Lewis acidic strength \(BF _3 > BCl _3 > BBr _3 > BI _3\) (extent of back bonding) \((2 p-2 p)(2 p-3 p)(2 p-4 p)(2 p-5 p)\) \(BF _3 < BCl _3 < BBr _3 < BI _3\) (lewis acidic nature)
11. THE P-BLOCK ELEMENTS
190077
The correct order of bond enthalpy \(\left( kJ\,mol ^{-1}\right)\) is :
1 \(Si - Si > C - C > Sn - Sn > Ge - Ge\)
2 \(Si - Si > C - C > Ge - Ge > Sn - Sn\)
3 \(C - C > Si - Si > Sn - Sn > Ge - Ge\)
4 \(C - C > Si - Si > Ge - Ge > Sn - Sn\)
Explanation:
(Bond enthalpy order \(C - C > Si - Si > Ge - Ge > Sn - Sn )\)
11. THE P-BLOCK ELEMENTS
190078
For compound having the formula \(GaAlCl _4\), the correct option from the following is
1 \(Ga\) is more electronegative than \(Al\) and is present as a cationic part of the salt \(GaAlCl _4\)
2 Oxidation state of \(Ga\) in the salt \(GaAlC _4\) is \(+3\).
3 \(Cl\) forms bond with both \(Al\) and \(Ga\) in \(GaAlCl _4\)
4 \(Ga\) is coordinated with \(Cl\) in \(GaAlCl _4\)
Explanation:
Gallous tetrachloro aluminate \(Ga ^{+} AlCl _4^{-}\) \(2 Ga + Ga ^{+} GaCl _4^{-}+2 Al _2 Cl _6 \stackrel{190^{\circ}}{\longrightarrow} 4 Ga ^{+} AlCl _4^{-}\) Ga is cationic part of salt \(GaAlCl _4\).
11. THE P-BLOCK ELEMENTS
190081
\(Be ( OH )_2\) react with \(Sr ( OH )_2\) to yield an ionic salt. Choose the incorrect option related to this reaction from the following:
1 Be is tetrahedrally coordinated in the ionic salt.
2 The reaction is an example of acid - base neutralization reaction.
3 Both \(Sr\) and \(Be\) elements are present in the ionic salt.
4 The elements \(Be\) is present in the cationic part of the ionic salt.
Explanation:
\(Be ( OH )_2\) is amphoteric in nature. \(Sr ( OH )_2\) is basic in nature. These two undergo acid - base reaction to form a salt. \(Be ( OH )_2+ Sr ( OH )_2 \rightarrow Sr \left[ Be ( OH )_4\right]\) (salt)
190076
The Lewis acid character of boron tri halides follows the order:
1 \(BBr _3 > BI _3 > BCI _3 > BF _3\)
2 \(BCl _3 > BF _3 > BBr _3 > BI _3\)
3 \(BF _3 > BCl _3 > BBr _3 > BI _3\)
4 \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Explanation:
Extent of back bonding, reduces down the group leading to more Lewis acidic strength \(BF _3 > BCl _3 > BBr _3 > BI _3\) (extent of back bonding) \((2 p-2 p)(2 p-3 p)(2 p-4 p)(2 p-5 p)\) \(BF _3 < BCl _3 < BBr _3 < BI _3\) (lewis acidic nature)
11. THE P-BLOCK ELEMENTS
190077
The correct order of bond enthalpy \(\left( kJ\,mol ^{-1}\right)\) is :
1 \(Si - Si > C - C > Sn - Sn > Ge - Ge\)
2 \(Si - Si > C - C > Ge - Ge > Sn - Sn\)
3 \(C - C > Si - Si > Sn - Sn > Ge - Ge\)
4 \(C - C > Si - Si > Ge - Ge > Sn - Sn\)
Explanation:
(Bond enthalpy order \(C - C > Si - Si > Ge - Ge > Sn - Sn )\)
11. THE P-BLOCK ELEMENTS
190078
For compound having the formula \(GaAlCl _4\), the correct option from the following is
1 \(Ga\) is more electronegative than \(Al\) and is present as a cationic part of the salt \(GaAlCl _4\)
2 Oxidation state of \(Ga\) in the salt \(GaAlC _4\) is \(+3\).
3 \(Cl\) forms bond with both \(Al\) and \(Ga\) in \(GaAlCl _4\)
4 \(Ga\) is coordinated with \(Cl\) in \(GaAlCl _4\)
Explanation:
Gallous tetrachloro aluminate \(Ga ^{+} AlCl _4^{-}\) \(2 Ga + Ga ^{+} GaCl _4^{-}+2 Al _2 Cl _6 \stackrel{190^{\circ}}{\longrightarrow} 4 Ga ^{+} AlCl _4^{-}\) Ga is cationic part of salt \(GaAlCl _4\).
11. THE P-BLOCK ELEMENTS
190081
\(Be ( OH )_2\) react with \(Sr ( OH )_2\) to yield an ionic salt. Choose the incorrect option related to this reaction from the following:
1 Be is tetrahedrally coordinated in the ionic salt.
2 The reaction is an example of acid - base neutralization reaction.
3 Both \(Sr\) and \(Be\) elements are present in the ionic salt.
4 The elements \(Be\) is present in the cationic part of the ionic salt.
Explanation:
\(Be ( OH )_2\) is amphoteric in nature. \(Sr ( OH )_2\) is basic in nature. These two undergo acid - base reaction to form a salt. \(Be ( OH )_2+ Sr ( OH )_2 \rightarrow Sr \left[ Be ( OH )_4\right]\) (salt)
190076
The Lewis acid character of boron tri halides follows the order:
1 \(BBr _3 > BI _3 > BCI _3 > BF _3\)
2 \(BCl _3 > BF _3 > BBr _3 > BI _3\)
3 \(BF _3 > BCl _3 > BBr _3 > BI _3\)
4 \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Explanation:
Extent of back bonding, reduces down the group leading to more Lewis acidic strength \(BF _3 > BCl _3 > BBr _3 > BI _3\) (extent of back bonding) \((2 p-2 p)(2 p-3 p)(2 p-4 p)(2 p-5 p)\) \(BF _3 < BCl _3 < BBr _3 < BI _3\) (lewis acidic nature)
11. THE P-BLOCK ELEMENTS
190077
The correct order of bond enthalpy \(\left( kJ\,mol ^{-1}\right)\) is :
1 \(Si - Si > C - C > Sn - Sn > Ge - Ge\)
2 \(Si - Si > C - C > Ge - Ge > Sn - Sn\)
3 \(C - C > Si - Si > Sn - Sn > Ge - Ge\)
4 \(C - C > Si - Si > Ge - Ge > Sn - Sn\)
Explanation:
(Bond enthalpy order \(C - C > Si - Si > Ge - Ge > Sn - Sn )\)
11. THE P-BLOCK ELEMENTS
190078
For compound having the formula \(GaAlCl _4\), the correct option from the following is
1 \(Ga\) is more electronegative than \(Al\) and is present as a cationic part of the salt \(GaAlCl _4\)
2 Oxidation state of \(Ga\) in the salt \(GaAlC _4\) is \(+3\).
3 \(Cl\) forms bond with both \(Al\) and \(Ga\) in \(GaAlCl _4\)
4 \(Ga\) is coordinated with \(Cl\) in \(GaAlCl _4\)
Explanation:
Gallous tetrachloro aluminate \(Ga ^{+} AlCl _4^{-}\) \(2 Ga + Ga ^{+} GaCl _4^{-}+2 Al _2 Cl _6 \stackrel{190^{\circ}}{\longrightarrow} 4 Ga ^{+} AlCl _4^{-}\) Ga is cationic part of salt \(GaAlCl _4\).
11. THE P-BLOCK ELEMENTS
190081
\(Be ( OH )_2\) react with \(Sr ( OH )_2\) to yield an ionic salt. Choose the incorrect option related to this reaction from the following:
1 Be is tetrahedrally coordinated in the ionic salt.
2 The reaction is an example of acid - base neutralization reaction.
3 Both \(Sr\) and \(Be\) elements are present in the ionic salt.
4 The elements \(Be\) is present in the cationic part of the ionic salt.
Explanation:
\(Be ( OH )_2\) is amphoteric in nature. \(Sr ( OH )_2\) is basic in nature. These two undergo acid - base reaction to form a salt. \(Be ( OH )_2+ Sr ( OH )_2 \rightarrow Sr \left[ Be ( OH )_4\right]\) (salt)
190076
The Lewis acid character of boron tri halides follows the order:
1 \(BBr _3 > BI _3 > BCI _3 > BF _3\)
2 \(BCl _3 > BF _3 > BBr _3 > BI _3\)
3 \(BF _3 > BCl _3 > BBr _3 > BI _3\)
4 \(BI _3 > BBr _3 > BCl _3 > BF _3\)
Explanation:
Extent of back bonding, reduces down the group leading to more Lewis acidic strength \(BF _3 > BCl _3 > BBr _3 > BI _3\) (extent of back bonding) \((2 p-2 p)(2 p-3 p)(2 p-4 p)(2 p-5 p)\) \(BF _3 < BCl _3 < BBr _3 < BI _3\) (lewis acidic nature)
11. THE P-BLOCK ELEMENTS
190077
The correct order of bond enthalpy \(\left( kJ\,mol ^{-1}\right)\) is :
1 \(Si - Si > C - C > Sn - Sn > Ge - Ge\)
2 \(Si - Si > C - C > Ge - Ge > Sn - Sn\)
3 \(C - C > Si - Si > Sn - Sn > Ge - Ge\)
4 \(C - C > Si - Si > Ge - Ge > Sn - Sn\)
Explanation:
(Bond enthalpy order \(C - C > Si - Si > Ge - Ge > Sn - Sn )\)
11. THE P-BLOCK ELEMENTS
190078
For compound having the formula \(GaAlCl _4\), the correct option from the following is
1 \(Ga\) is more electronegative than \(Al\) and is present as a cationic part of the salt \(GaAlCl _4\)
2 Oxidation state of \(Ga\) in the salt \(GaAlC _4\) is \(+3\).
3 \(Cl\) forms bond with both \(Al\) and \(Ga\) in \(GaAlCl _4\)
4 \(Ga\) is coordinated with \(Cl\) in \(GaAlCl _4\)
Explanation:
Gallous tetrachloro aluminate \(Ga ^{+} AlCl _4^{-}\) \(2 Ga + Ga ^{+} GaCl _4^{-}+2 Al _2 Cl _6 \stackrel{190^{\circ}}{\longrightarrow} 4 Ga ^{+} AlCl _4^{-}\) Ga is cationic part of salt \(GaAlCl _4\).
11. THE P-BLOCK ELEMENTS
190081
\(Be ( OH )_2\) react with \(Sr ( OH )_2\) to yield an ionic salt. Choose the incorrect option related to this reaction from the following:
1 Be is tetrahedrally coordinated in the ionic salt.
2 The reaction is an example of acid - base neutralization reaction.
3 Both \(Sr\) and \(Be\) elements are present in the ionic salt.
4 The elements \(Be\) is present in the cationic part of the ionic salt.
Explanation:
\(Be ( OH )_2\) is amphoteric in nature. \(Sr ( OH )_2\) is basic in nature. These two undergo acid - base reaction to form a salt. \(Be ( OH )_2+ Sr ( OH )_2 \rightarrow Sr \left[ Be ( OH )_4\right]\) (salt)
