Class 12 Exam  >  Class 12 Questions  >  Direction (Q. Nos. 1-10) This section contain... Start Learning for Free
Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
Which of the following property decreases down the group in the halogens?
  • a)
    Electropositive nature
  • b)
    Density
  • c)
    Boiling point
  • d)
    Ionisation enthalp
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Direction (Q. Nos. 1-10) This section contains 10 multiple choice ques...
Due to increase in atomic size, ionisation enthalpy decreases down the group.
View all questions of this test
Most Upvoted Answer
Direction (Q. Nos. 1-10) This section contains 10 multiple choice ques...
Decrease in Ionisation Enthalpy down the Group in Halogens

Explanation:
The halogens are a group of highly reactive non-metals which are located in group 17 of the periodic table. The group includes fluorine, chlorine, bromine, iodine, and astatine.

Ionisation enthalpy is the amount of energy required to remove an electron from an atom or ion in the gaseous state. It is a measure of the tendency of an atom or ion to lose an electron. The ionisation enthalpy of halogens decreases down the group due to the following reasons:

1. Increase in atomic size: As we move down the group, the atomic size of halogens increases due to the addition of new shells of electrons. The valence electrons are farther away from the nucleus, and the effective nuclear charge experienced by the outermost electron decreases. Therefore, it becomes easier to remove an electron from a larger atom.

2. Shielding effect: The increase in the number of shells results in an increase in the screening effect. The valence electrons are shielded by the inner electrons, which reduces the attraction between the nucleus and the outermost electron. Therefore, the ionisation enthalpy decreases down the group.

3. Increase in electron-electron repulsion: As we move down the group, the number of electrons increases, leading to an increase in electron-electron repulsion. This repulsion weakens the attraction between the nucleus and the outermost electron, making it easier to remove an electron.

Thus, the ionisation enthalpy of halogens decreases down the group due to the increase in atomic size, shielding effect, and increase in electron-electron repulsion.

Therefore, option (d) is correct - Ionisation enthalpy.
Explore Courses for Class 12 exam

Similar Class 12 Doubts

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer?
Question Description
Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q. Which of the following property decreases down the group in the halogens?a)Electropositive natureb)Densityc)Boiling pointd)Ionisation enthalpCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
Explore Courses for Class 12 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev