JEE Exam > JEE Questions > STATEMENT-IAlthough PF5, PCl5and PBr5are know...
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STATEMENT-I
Although PF5, PCl5 and PBr5 are known, the pentahalides of nitrogen have not been observed
STATEMENT-II
Phosphorus has lower electronegativity than nitrogen. [IIT-1994]
- a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.
- b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-I
- c)statement-I is true but statement-II is false
- d)statement-I is false but statement-II is true.
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of ni...
Statement-I: Although PF5, PCl5, and PBr5 are known, the pentahalides of nitrogen have not been observed.
Statement-II: Phosphorus has lower electronegativity than nitrogen.
Explanation:
Statement-I
Pentahalides of nitrogen, such as NF5, NCl5, and NBr5, have not been observed.
- Nitrogen, being a small atom, has a smaller atomic size compared to phosphorus. This leads to higher electron-electron repulsion in the valence shell of nitrogen, making it difficult for nitrogen to accommodate five halogen atoms, resulting in instability.
- Nitrogen's valence shell can accommodate a maximum of 8 electrons, following the octet rule. To form a pentahalide, nitrogen would need to have 10 valence electrons, which is not possible due to its small size and limited capacity to expand its valence shell.
Statement-II
Phosphorus has lower electronegativity than nitrogen.
- Electronegativity is the measure of an atom's ability to attract shared electrons towards itself in a covalent bond.
- Phosphorus has a lower electronegativity than nitrogen. It means that phosphorus has a weaker ability to attract shared electrons towards itself compared to nitrogen.
Explanation of the relationship between Statement-I and Statement-II
- The lower electronegativity of phosphorus compared to nitrogen makes it easier for phosphorus to form compounds with five halogen atoms.
- Phosphorus can accommodate five halogen atoms in its valence shell due to its larger atomic size and lower electron-electron repulsion compared to nitrogen.
- This difference in electronegativity and atomic size between phosphorus and nitrogen explains why pentahalides of phosphorus (PF5, PCl5, PBr5) are known, while pentahalides of nitrogen (NF5, NCl5, NBr5) have not been observed.
Conclusion
Therefore, both Statement-I and Statement-II are true, but Statement-II is the correct explanation of Statement-I. Option 'B' is the correct answer.
Statement-II: Phosphorus has lower electronegativity than nitrogen.
Explanation:
Statement-I
Pentahalides of nitrogen, such as NF5, NCl5, and NBr5, have not been observed.
- Nitrogen, being a small atom, has a smaller atomic size compared to phosphorus. This leads to higher electron-electron repulsion in the valence shell of nitrogen, making it difficult for nitrogen to accommodate five halogen atoms, resulting in instability.
- Nitrogen's valence shell can accommodate a maximum of 8 electrons, following the octet rule. To form a pentahalide, nitrogen would need to have 10 valence electrons, which is not possible due to its small size and limited capacity to expand its valence shell.
Statement-II
Phosphorus has lower electronegativity than nitrogen.
- Electronegativity is the measure of an atom's ability to attract shared electrons towards itself in a covalent bond.
- Phosphorus has a lower electronegativity than nitrogen. It means that phosphorus has a weaker ability to attract shared electrons towards itself compared to nitrogen.
Explanation of the relationship between Statement-I and Statement-II
- The lower electronegativity of phosphorus compared to nitrogen makes it easier for phosphorus to form compounds with five halogen atoms.
- Phosphorus can accommodate five halogen atoms in its valence shell due to its larger atomic size and lower electron-electron repulsion compared to nitrogen.
- This difference in electronegativity and atomic size between phosphorus and nitrogen explains why pentahalides of phosphorus (PF5, PCl5, PBr5) are known, while pentahalides of nitrogen (NF5, NCl5, NBr5) have not been observed.
Conclusion
Therefore, both Statement-I and Statement-II are true, but Statement-II is the correct explanation of Statement-I. Option 'B' is the correct answer.
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Community Answer
STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of ni...
Option B is correct. Phosphorus has d orbitals, therefore it form pentahalides. But Nitrogen do not d orbitals, therefore N2do not form pentahalides.
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STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer?
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STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer?.
STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer?.
Solutions for STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
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ample number of questions to practice STATEMENT-IAlthough PF5, PCl5and PBr5are known, the pentahalides of nitrogen have not been observedSTATEMENT-IIPhosphorus has lower electronegativity than nitrogen. [IIT-1994]a)Both statement-I and statement-II are true, and statement-II is the correct ex planation of statement-I.b)Both statement-I and statement-II are true, but statement-II is not the correct explanation of statement-Ic)statement-I is true but statement-II is falsed)statement-I is false but statement-II is true.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice JEE tests.
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