Is the following compound chiral (optically active)? `trans-[CrCI_2(o x)_2]^3-`

Is the following compound chiral (optically active)? cis-[CrCI_2(o x)_2]^3-

From the following compounds which is optically inactive :

pm 2-butanol is optically inactive

Which of the following amino acids is not optically active?

Which of the following compounds show optical isomerism ? (i) Cis-[Co(NH_3)_4Cl_2]^+ (ii) Trans-[Co(en)_2Cl_2]^+ (iii) Cis-[Co(en)_2Cl_2]^+ (iv) [Co(en)_3]^(3+) Choose the correct answer codes given below.

What are optically active compounds ?

Which of the following compounds belong to same homo-logous series? C_2 H_6 O2 , C2 H2, C2 H6, CH4O2.

Write the names of the following compounds : Mg(HCO_3)_2