NEET Exam > NEET Questions > The enthalpies of formation of HF and HCI are...
Start Learning for Free
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?
- a)HF is more stable than HCl
- b)HCl are more stable than HF
- c)HF and HCl are exothermic compounds
- d)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogen
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respe...
More negative the value of enthalpy of formation, more is the stability. On account of this, HF is more stable than HCl. Also, due to highest electronegativity of fluorine, HF molecules involve intermolecular hydrogen bonding between them, thus, increasing the stability. So, option b is correct.
Free Test
FREE
| Start Free Test |
Community Answer
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respe...
Explanation:
To determine which statement is incorrect, let's analyze each option one by one.
a) HF is more stable than HCl:
The enthalpy of formation for HF is -161 kJ/mol, while for HCl it is -92 kJ/mol. The enthalpy of formation is the energy change when one mole of a compound is formed from its constituent elements in their standard states. A more negative enthalpy of formation indicates a more stable compound. Since the enthalpy of formation for HF is more negative than that of HCl, it means that HF is more stable than HCl. Therefore, option 'a' is correct.
b) HCl are more stable than HF:
As mentioned above, the enthalpy of formation for HCl is -92 kJ/mol, which is less negative than the enthalpy of formation for HF (-161 kJ/mol). This implies that HCl is less stable than HF. Therefore, option 'b' is incorrect.
c) HF and HCl are exothermic compounds:
The negative enthalpy of formation for both HF and HCl indicates that these compounds release energy when they are formed. This energy release is characteristic of exothermic reactions. Therefore, option 'c' is correct.
d) Affinity of fluorine to hydrogen is greater than that of chlorine to hydrogen:
Affinity refers to the attraction or tendency of one element to bond with another element. In this case, the option states that fluorine has a greater affinity for hydrogen compared to chlorine. Since the enthalpy of formation for HF is more negative than that of HCl, it suggests that the bond between fluorine and hydrogen is stronger than the bond between chlorine and hydrogen. Therefore, option 'd' is correct.
In conclusion, the incorrect statement among the given options is 'b) HCl are more stable than HF'. The correct statement is that HF is more stable than HCl.
To determine which statement is incorrect, let's analyze each option one by one.
a) HF is more stable than HCl:
The enthalpy of formation for HF is -161 kJ/mol, while for HCl it is -92 kJ/mol. The enthalpy of formation is the energy change when one mole of a compound is formed from its constituent elements in their standard states. A more negative enthalpy of formation indicates a more stable compound. Since the enthalpy of formation for HF is more negative than that of HCl, it means that HF is more stable than HCl. Therefore, option 'a' is correct.
b) HCl are more stable than HF:
As mentioned above, the enthalpy of formation for HCl is -92 kJ/mol, which is less negative than the enthalpy of formation for HF (-161 kJ/mol). This implies that HCl is less stable than HF. Therefore, option 'b' is incorrect.
c) HF and HCl are exothermic compounds:
The negative enthalpy of formation for both HF and HCl indicates that these compounds release energy when they are formed. This energy release is characteristic of exothermic reactions. Therefore, option 'c' is correct.
d) Affinity of fluorine to hydrogen is greater than that of chlorine to hydrogen:
Affinity refers to the attraction or tendency of one element to bond with another element. In this case, the option states that fluorine has a greater affinity for hydrogen compared to chlorine. Since the enthalpy of formation for HF is more negative than that of HCl, it suggests that the bond between fluorine and hydrogen is stronger than the bond between chlorine and hydrogen. Therefore, option 'd' is correct.
In conclusion, the incorrect statement among the given options is 'b) HCl are more stable than HF'. The correct statement is that HF is more stable than HCl.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
|
Explore Courses for NEET exam
|
|
Similar NEET Doubts
Top Courses for NEETView all
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer?
Question Description
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer?.
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The enthalpies of formation of HF and HCI are -161 KJ and -92 KJ respectively. which of the following statement is incorrect?a)HF is more stable than HClb)HCl are more stable than HFc)HF and HCl are exothermic compoundsd)affinity of fluorine to hydrogen is greater than that of chlorine to hydrogenCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
|
|
Explore Courses for NEET exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup