The following complexs are given?
trans-`[Co(NH_(3))_(4)1_(2)]^(o+)`
`cis-[Co(NH_(3))_(2)(en)_(2)]^(3+)`
trans-`[Co(NH_(3))_(2)(en)_(2)]^(3+)`
`[NiI_(4)]^(2-)`
`[TiF_(6)]^(2-)`
`[CoF_(6)]^(3-)`
Choose the correct code .

Options

A. (1),(2) are optically active,
B. (2) is optically active, (1), (3) are optically inactive
C. (4),(6) are colourless (5) is coloured
D. (4) is coloured and (5) is colourless

Answer

b,d

Explanation

(1) and (3) are symmetrical not opticaly active. (5) has `Ti^(4+)(d^(0))` configuration.