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Applicable to questions about the spatial arrangement of atoms in a molecule and how they affect its physical or chemical properties.

1 vote
Accepted

Can the following compound having a centre of symmetry be called both optically inactive and...

You are correct that the molecule is not chiral. It is indeed a meso compound due to the internal symmetry plane. Also, don't worry about free-rotation of single bonds.
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3 votes
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Stereochemistry of cycloalkanes having substituents

It's not necessary to build a model, but you must use wedged/dashed bonds to show stereochemistry. If someone thinks differently, please comment and correct me. …
Vlad's user avatar
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1 vote
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Can the following molecules be called meso compounds (cyclic structures which usually exist ...

These molecules can never be planar. There are no internal symmetry planes and therefore they are not meso.
Vlad's user avatar
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