Which of the following are enantiomers?

The separation of a racemic mixture into pure enantiomers is termed as

Which of the following compounds is optically active?

What is the process of conversion of a pure optical enantiomer into an optically inactive mixture of $(+)$ and $(-)$ enantiomers called?

Which of the following alkenes exhibits optical isomerism?

Ignoring specific markings,which of the following objects are chiral?
$(I)$ $A$ shoe
$(II)$ $A$ book
$(III)$ $A$ pencil
$(IV)$ $A$ pair of shoes (consider the pair as one object)
$(V)$ $A$ pair of scissors