Identify basic $$\alpha$$-amino acid from following.

A gas is allowed to expand against a constant external pressure of 2.5 bar from an initial volume 'x' L to final volume of 4.5 L. If amount of work done is 5 dm$$^3$$ bar, what is the value of 'x'?

identify the species from following that exhibits no bond resonance.

When a mixture of vapours of phenol and hydrogen is passed over nickel catalyst at 433 K, the product obtained is