List of top Chemistry Questions on Isomerism asked in KEAM

Which of the following is not a chiral molecule?
Which one of the following is an achiral molecule?
Which one of the following compounds shows cis-trans isomerism?
Which of the following compounds are optically active? (i) 3-hydroxypentane$\quad$$\quad$ (ii) 2-aminopropanoic acid (iii) 2-chlorobutane $\quad$$\quad$(iv) 2-methylbutane Choose your answer from the codes given below