MCQ
Paraldehyde is
- AA trimer of formaldehyde
- BA trimer of acetaldehyde
- CA hexamer of formaldehyde
- ✓A hexamer of acetaldehyde

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$(i)\, [CoCl_3 (NH_3)_3]$ $(ii)\, [Co(en)_3]Cl_3$
$(iii)\, [Co(C_2O_4)_2(NH_3)_2]^-$ $(iv)\, [CrCl_2(NH_3)_2(en)]^+$