Identify more favourable resonance structure from the following. Justify.

 

Find out all the functional groups present in the given polyfunctional compound.

Dopamine a neurotransmitter that is deficient in Parkinson's disease.

Find out all the functional groups present in the given polyfunctional compound.

Thyroxine the principal thyroid hormone.

Find out all the functional groups present in the given polyfunctional compound.

Penicillin G a naturally occurring antibiotic.

Find out the most stable species from the following. Justify.

Find out the most stable species from the following. Justify.

Find out the most stable species from the following. Justify.

Identify the $\mathrm{\alpha }-$ carbons in the given species and give the total number of $\mathrm{\alpha }-$ hydrogen present in it.

Identify the $\mathrm{\alpha }-$ carbons in the given species and give the total number of $\mathrm{\alpha }-$ hydrogen in it.