316194
Assertion : \(\mathrm{B}(\mathrm{OH})_{3}\) is acidic while \(\mathrm{In}(\mathrm{OH})_{3}\) is basic. Reason : \(\mathrm{B}(\mathrm{OH})_{3}\) has highly H-bonded network structure.
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:
Due to small size and high ionisation enthalpy, \(\mathrm{B}\) in \(\mathrm{B}(\mathrm{OH})_{3}\) accepts \(\mathrm{OH}^{-}\) ion from \(\mathrm{H}_{2} \mathrm{O}\) and thus, acts as a Lewis acid. However, due to large size and low ionisation enthalpy of \({\text{In}}\), the \({\text{ In - OH}}\) bond readily breaks and releases \(\mathrm{OH}^{-}\) ion, and \(\mathrm{In}(\mathrm{OH})_{3}\) acts as a base. Boric acid has \(\mathrm{H}\) - bonded network structure. So, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316195
Assertion : Al becomes passive in conc. \(\mathrm{HNO}_{3}\). Reason : Conc. \(\mathrm{HNO}_{3}\) has no action on aluminium metal.
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:
Aluminum (Al) becomes passive when treated with concentrated \(\mathrm{HNO}_{3}\) because concentrated \(\mathrm{HNO}_{3}\) is an oxidizing agent that produces a protective layer of oxide on the surface of aluminum metal. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316196
Aluminiumis
1 A dehydrating agent
2 An oxidizing agent
3 Amphoteric
4 Highly electronegative element
Explanation:
Aluminium reacts with both acids as well as alkalies so, it is an amphoteric element.
CHXI11:THE P-BLOCK ELEMENTS
316197
Hydrogen gas can be produced by the reaction of aluminium with a concentrated solution of
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CHXI11:THE P-BLOCK ELEMENTS
316194
Assertion : \(\mathrm{B}(\mathrm{OH})_{3}\) is acidic while \(\mathrm{In}(\mathrm{OH})_{3}\) is basic. Reason : \(\mathrm{B}(\mathrm{OH})_{3}\) has highly H-bonded network structure.
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:
Due to small size and high ionisation enthalpy, \(\mathrm{B}\) in \(\mathrm{B}(\mathrm{OH})_{3}\) accepts \(\mathrm{OH}^{-}\) ion from \(\mathrm{H}_{2} \mathrm{O}\) and thus, acts as a Lewis acid. However, due to large size and low ionisation enthalpy of \({\text{In}}\), the \({\text{ In - OH}}\) bond readily breaks and releases \(\mathrm{OH}^{-}\) ion, and \(\mathrm{In}(\mathrm{OH})_{3}\) acts as a base. Boric acid has \(\mathrm{H}\) - bonded network structure. So, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316195
Assertion : Al becomes passive in conc. \(\mathrm{HNO}_{3}\). Reason : Conc. \(\mathrm{HNO}_{3}\) has no action on aluminium metal.
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:
Aluminum (Al) becomes passive when treated with concentrated \(\mathrm{HNO}_{3}\) because concentrated \(\mathrm{HNO}_{3}\) is an oxidizing agent that produces a protective layer of oxide on the surface of aluminum metal. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316196
Aluminiumis
1 A dehydrating agent
2 An oxidizing agent
3 Amphoteric
4 Highly electronegative element
Explanation:
Aluminium reacts with both acids as well as alkalies so, it is an amphoteric element.
CHXI11:THE P-BLOCK ELEMENTS
316197
Hydrogen gas can be produced by the reaction of aluminium with a concentrated solution of
316194
Assertion : \(\mathrm{B}(\mathrm{OH})_{3}\) is acidic while \(\mathrm{In}(\mathrm{OH})_{3}\) is basic. Reason : \(\mathrm{B}(\mathrm{OH})_{3}\) has highly H-bonded network structure.
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:
Due to small size and high ionisation enthalpy, \(\mathrm{B}\) in \(\mathrm{B}(\mathrm{OH})_{3}\) accepts \(\mathrm{OH}^{-}\) ion from \(\mathrm{H}_{2} \mathrm{O}\) and thus, acts as a Lewis acid. However, due to large size and low ionisation enthalpy of \({\text{In}}\), the \({\text{ In - OH}}\) bond readily breaks and releases \(\mathrm{OH}^{-}\) ion, and \(\mathrm{In}(\mathrm{OH})_{3}\) acts as a base. Boric acid has \(\mathrm{H}\) - bonded network structure. So, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316195
Assertion : Al becomes passive in conc. \(\mathrm{HNO}_{3}\). Reason : Conc. \(\mathrm{HNO}_{3}\) has no action on aluminium metal.
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:
Aluminum (Al) becomes passive when treated with concentrated \(\mathrm{HNO}_{3}\) because concentrated \(\mathrm{HNO}_{3}\) is an oxidizing agent that produces a protective layer of oxide on the surface of aluminum metal. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316196
Aluminiumis
1 A dehydrating agent
2 An oxidizing agent
3 Amphoteric
4 Highly electronegative element
Explanation:
Aluminium reacts with both acids as well as alkalies so, it is an amphoteric element.
CHXI11:THE P-BLOCK ELEMENTS
316197
Hydrogen gas can be produced by the reaction of aluminium with a concentrated solution of
316194
Assertion : \(\mathrm{B}(\mathrm{OH})_{3}\) is acidic while \(\mathrm{In}(\mathrm{OH})_{3}\) is basic. Reason : \(\mathrm{B}(\mathrm{OH})_{3}\) has highly H-bonded network structure.
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:
Due to small size and high ionisation enthalpy, \(\mathrm{B}\) in \(\mathrm{B}(\mathrm{OH})_{3}\) accepts \(\mathrm{OH}^{-}\) ion from \(\mathrm{H}_{2} \mathrm{O}\) and thus, acts as a Lewis acid. However, due to large size and low ionisation enthalpy of \({\text{In}}\), the \({\text{ In - OH}}\) bond readily breaks and releases \(\mathrm{OH}^{-}\) ion, and \(\mathrm{In}(\mathrm{OH})_{3}\) acts as a base. Boric acid has \(\mathrm{H}\) - bonded network structure. So, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316195
Assertion : Al becomes passive in conc. \(\mathrm{HNO}_{3}\). Reason : Conc. \(\mathrm{HNO}_{3}\) has no action on aluminium metal.
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:
Aluminum (Al) becomes passive when treated with concentrated \(\mathrm{HNO}_{3}\) because concentrated \(\mathrm{HNO}_{3}\) is an oxidizing agent that produces a protective layer of oxide on the surface of aluminum metal. So, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316196
Aluminiumis
1 A dehydrating agent
2 An oxidizing agent
3 Amphoteric
4 Highly electronegative element
Explanation:
Aluminium reacts with both acids as well as alkalies so, it is an amphoteric element.
CHXI11:THE P-BLOCK ELEMENTS
316197
Hydrogen gas can be produced by the reaction of aluminium with a concentrated solution of