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The correct statement regarding elements of symmetry is/are
  • a)
    Presence of axis of symmetry destroy the chirality
  • b)
    Plane of symmetry makes a compound superimposable on mirror image
  • c)
    Centre of symmetry destroy chirality
  • d)
    Absence of both plane and centre of symmetry is essential for optical activity 
Correct answer is option 'B,C,D'. Can you explain this answer?
Verified Answer
The correct statement regarding elements of symmetry is/area)Presence ...

The molecule on the left has a plane of symmetry through the center carbon. This is a mirror plane; in other words, one half of the molecule is a perfect reflection of the other half of the molecule. This molecule is achiral because of its mirror plane. 
The molecule on the right has a center of symmetry or an inversion center. An inversion center is a point in the molecule - not necessarily on an atom - through which all other atoms can be reflected 180 degrees into another, identical, atom. (In more accurate symmetry terms, inversion through a center is equivalent to rotating groups by 180 degrees and then reflecting the groups through a plane perpendicular to the rotation axis.) The inversion center is represented by the blue circle in the above example. The same molecule is shown three-dimensionally below. The inversion center is in the center of the middle carbon-carbon bond. This molecule is not chiral because of its inversion center.
In general organic compounds, which lack a plane of symmetry are optically active and are called chiral compounds

Achiral Chiral Optically active compounds exist as enantiomers, which are mirror images of each other.
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Most Upvoted Answer
The correct statement regarding elements of symmetry is/area)Presence ...
the correct options are b,c and d:
Plane of symmetry makes a compound superimposable on the mirror image, Centre of symmetry destroys chirality and Optical activity is observed in the presence of chirality, and the absence of both plane and center of symmetry is essential for optical activity.
 
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The correct statement regarding elements of symmetry is/area)Presence ...
Symmetry and Chirality

Introduction:
Symmetry is an important concept in chemistry, especially when studying the properties of molecules. Chirality, on the other hand, refers to the property of an object or a molecule that is non-superimposable on its mirror image. In this question, we are asked to determine the correct statement regarding elements of symmetry and their effect on chirality.

Axis of Symmetry:
An axis of symmetry in a molecule is an imaginary line around which the molecule can be rotated and still appear the same. The presence of an axis of symmetry can destroy the chirality of a molecule. This is because if a molecule has an axis of symmetry, its mirror image can be obtained by rotating it around the axis. Therefore, the molecule and its mirror image are superimposable, and the molecule is not chiral. Hence, option 'A' is incorrect.

Plane of Symmetry:
A plane of symmetry in a molecule is an imaginary plane that divides the molecule into two halves, such that one half is the mirror image of the other. If a molecule possesses a plane of symmetry, it is superimposable on its mirror image and, therefore, not chiral. Thus, the presence of a plane of symmetry destroys the chirality of a molecule. Hence, option 'B' is correct.

Centre of Symmetry:
A molecule possesses a centre of symmetry if there is an imaginary point in the molecule, such that for any atom on one side of the point, there is an equivalent atom on the other side of the point, in the exact opposite direction. The presence of a centre of symmetry also destroys chirality, as the molecule and its mirror image can be superimposed by inversion through the centre of symmetry. Therefore, option 'C' is correct.

Absence of Plane and Centre of Symmetry:
The absence of both a plane and a centre of symmetry is essential for a molecule to exhibit optical activity. Optical activity refers to the ability of a molecule to rotate the plane of polarized light. In the absence of any elements of symmetry, the molecule is non-superimposable on its mirror image, and its mirror image cannot be obtained by rotation or inversion. This is a characteristic feature of chiral molecules. Hence, option 'D' is correct.

Conclusion:
In conclusion, the correct statement regarding elements of symmetry and their effect on chirality is that a molecule with a plane of symmetry, a centre of symmetry, or both, is not chiral. The absence of both a plane and a centre of symmetry is essential for a molecule to exhibit chirality and optical activity.
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The correct statement regarding elements of symmetry is/area)Presence of axis of symmetry destroy the chiralityb)Plane of symmetry makes a compound superimposable on mirror imagec)Centre of symmetry destroy chiralityd)Absence of both plane and centre of symmetry is essential for optical activityCorrect answer is option 'B,C,D'. Can you explain this answer?
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The correct statement regarding elements of symmetry is/area)Presence of axis of symmetry destroy the chiralityb)Plane of symmetry makes a compound superimposable on mirror imagec)Centre of symmetry destroy chiralityd)Absence of both plane and centre of symmetry is essential for optical activityCorrect answer is option 'B,C,D'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The correct statement regarding elements of symmetry is/area)Presence of axis of symmetry destroy the chiralityb)Plane of symmetry makes a compound superimposable on mirror imagec)Centre of symmetry destroy chiralityd)Absence of both plane and centre of symmetry is essential for optical activityCorrect answer is option 'B,C,D'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The correct statement regarding elements of symmetry is/area)Presence of axis of symmetry destroy the chiralityb)Plane of symmetry makes a compound superimposable on mirror imagec)Centre of symmetry destroy chiralityd)Absence of both plane and centre of symmetry is essential for optical activityCorrect answer is option 'B,C,D'. Can you explain this answer?.
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