Chemical Properties and General Characteristics of Group – 13 Elements
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CHXI11:THE P-BLOCK ELEMENTS

316222 When \(\mathrm{BCl}_{3}\) is treated with water, it hydrolyses and forms \({\left[ {{\text{B(OH}}{{\text{)}}_{\text{4}}}} \right]^{\text{ - }}}\) only whereas \(\mathrm{AlCl}_{3}\) in acidified aqueous solution forms \(\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) ion. What is the hybridisation of boron and aluminium in these species?

1 \(\mathrm{sp}^{3}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
2 \(\mathrm{sp}^{3}, \mathrm{sp}^{3}\)
3 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3}\)
4 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316223 Which among the following group - 15 elements does not react with concentrated sulphuric acid?

1 Phosphorus
2 Arsenic
3 Antimony
4 Bismuth
KCET - 2020
CHXI11:THE P-BLOCK ELEMENTS

316224 Assertion :
\(\mathrm{N}_{2}\) is less reactive than \(\mathrm{P}_{4}\).
Reason :
Nitrogen has more electron gain enthalpy than phosphorus.

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.
CHXI11:THE P-BLOCK ELEMENTS

316225 The following are some statements about \(\mathrm{HNO}_{2}\).
(i) It acts as both oxidising and reducing agent.
(ii) It is a strong acid.
(iii) Its anhydride in pure state exists as pale blue liquid.
The correct combination is

1 All are correct
2 (i), (iii) are correct
3 (ii), (iii) are correct
4 (i), (ii) are correct
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CHXI11:THE P-BLOCK ELEMENTS

316222 When \(\mathrm{BCl}_{3}\) is treated with water, it hydrolyses and forms \({\left[ {{\text{B(OH}}{{\text{)}}_{\text{4}}}} \right]^{\text{ - }}}\) only whereas \(\mathrm{AlCl}_{3}\) in acidified aqueous solution forms \(\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) ion. What is the hybridisation of boron and aluminium in these species?

1 \(\mathrm{sp}^{3}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
2 \(\mathrm{sp}^{3}, \mathrm{sp}^{3}\)
3 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3}\)
4 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316223 Which among the following group - 15 elements does not react with concentrated sulphuric acid?

1 Phosphorus
2 Arsenic
3 Antimony
4 Bismuth
KCET - 2020
CHXI11:THE P-BLOCK ELEMENTS

316224 Assertion :
\(\mathrm{N}_{2}\) is less reactive than \(\mathrm{P}_{4}\).
Reason :
Nitrogen has more electron gain enthalpy than phosphorus.

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.
CHXI11:THE P-BLOCK ELEMENTS

316225 The following are some statements about \(\mathrm{HNO}_{2}\).
(i) It acts as both oxidising and reducing agent.
(ii) It is a strong acid.
(iii) Its anhydride in pure state exists as pale blue liquid.
The correct combination is

1 All are correct
2 (i), (iii) are correct
3 (ii), (iii) are correct
4 (i), (ii) are correct
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CHXI11:THE P-BLOCK ELEMENTS

316222 When \(\mathrm{BCl}_{3}\) is treated with water, it hydrolyses and forms \({\left[ {{\text{B(OH}}{{\text{)}}_{\text{4}}}} \right]^{\text{ - }}}\) only whereas \(\mathrm{AlCl}_{3}\) in acidified aqueous solution forms \(\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) ion. What is the hybridisation of boron and aluminium in these species?

1 \(\mathrm{sp}^{3}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
2 \(\mathrm{sp}^{3}, \mathrm{sp}^{3}\)
3 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3}\)
4 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316223 Which among the following group - 15 elements does not react with concentrated sulphuric acid?

1 Phosphorus
2 Arsenic
3 Antimony
4 Bismuth
KCET - 2020
CHXI11:THE P-BLOCK ELEMENTS

316224 Assertion :
\(\mathrm{N}_{2}\) is less reactive than \(\mathrm{P}_{4}\).
Reason :
Nitrogen has more electron gain enthalpy than phosphorus.

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.
CHXI11:THE P-BLOCK ELEMENTS

316225 The following are some statements about \(\mathrm{HNO}_{2}\).
(i) It acts as both oxidising and reducing agent.
(ii) It is a strong acid.
(iii) Its anhydride in pure state exists as pale blue liquid.
The correct combination is

1 All are correct
2 (i), (iii) are correct
3 (ii), (iii) are correct
4 (i), (ii) are correct
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CHXI11:THE P-BLOCK ELEMENTS

316222 When \(\mathrm{BCl}_{3}\) is treated with water, it hydrolyses and forms \({\left[ {{\text{B(OH}}{{\text{)}}_{\text{4}}}} \right]^{\text{ - }}}\) only whereas \(\mathrm{AlCl}_{3}\) in acidified aqueous solution forms \(\left[\mathrm{Al}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) ion. What is the hybridisation of boron and aluminium in these species?

1 \(\mathrm{sp}^{3}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
2 \(\mathrm{sp}^{3}, \mathrm{sp}^{3}\)
3 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3}\)
4 \(\mathrm{sp}^{3} \mathrm{~d}^{2}, \mathrm{sp}^{3} \mathrm{~d}^{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316223 Which among the following group - 15 elements does not react with concentrated sulphuric acid?

1 Phosphorus
2 Arsenic
3 Antimony
4 Bismuth
KCET - 2020
CHXI11:THE P-BLOCK ELEMENTS

316224 Assertion :
\(\mathrm{N}_{2}\) is less reactive than \(\mathrm{P}_{4}\).
Reason :
Nitrogen has more electron gain enthalpy than phosphorus.

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.
CHXI11:THE P-BLOCK ELEMENTS

316225 The following are some statements about \(\mathrm{HNO}_{2}\).
(i) It acts as both oxidising and reducing agent.
(ii) It is a strong acid.
(iii) Its anhydride in pure state exists as pale blue liquid.
The correct combination is

1 All are correct
2 (i), (iii) are correct
3 (ii), (iii) are correct
4 (i), (ii) are correct
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