(i) False
Diagonals are perpendicular and bisect each other.
(ii) True
The diagonals of a parallelogram bisect each other.
(iii) False
A perpendicular drawn from the centre of a circle to the chord, bisects the chord.
(iv) True
It divides the circle in two equal parts.
(v) True
The diagonals of a rhombus bisect each other at right angles.