Which of the following has a chiral structure?

Which of the following cannot be given to exemplify a chiral structure?

$(+) -$ Tartaric acid and meso-tartaric acid are ........

$A$ molecule is divided into two identical halves and contains $n$ asymmetric carbon atoms. What is the total number of stereoisomers?

Explain the following terms:
$(i)$ Plane polarised light
$(ii)$ Optical activity
$(iii)$ Chirality
$(iv)$ Chiral centre (atom)
$(v)$ Enantiomers
$(vi)$ Diastereomers
$(vii)$ Meso compounds
$(viii)$ Plane of symmetry and Achiral molecule
$(ix)$ Centre of symmetry

The total number of chiral compound/s from the following is $..............$.