106Yeah it should be a meso compound but what if you reflect the compound about its bottom portion. then you cant superimpose the mirror image on the original compound. So it should be optically active.
Q1. Which of the following isomers of dichlorocyclohexane are optically active?
(a) 1,1 dichloro
(b) 1,2 (cis) dichloro
(c) 1,2 (trans) dichloro
(d) 1,3 (cis) dichloro
(e) 1,3 (trans) dichloro
(f) 1,4 (cis) dichloro
(g) 1,4 (trans) dichloro
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6 Answers
106Q2. 
Comment on the optical activity/inactivity of the following compound
12)
isn't above compound a meso compound it has a plane of symmetry.
optically inactive
1061yes. bhaiya if we reflect it about the plane of the carbon cycle.
29(a) 1,1 dichloro inactive(since different grps shud be attached to carbon for it to be chiral)
(b) 1,2 (cis) dichloro inactive(symmetry)
(c) 1,2 (trans) dichloro active
(d) 1,3 (cis) dichloro inactive(symmetry)
(e) 1,3 (trans) dichloro active
(f) 1,4 (cis) dichloro inactive(symmetry)
(g) 1,4 (trans) dichloro inactive(point of symmetry)
106(b) 1,2 (cis) is chiral but inactive
the compound has NO symmetry yet it is inactive.