The pioneer country in the production of fuel-alcohol is

The excess pressure inside a spherical soap bubble of radius $1 ~cm$ is balanced by a column of oil (specific gravity $= 0.8$),$2 ~mm$ high. The surface tension of the bubble is: (in $~N/m$)

During embryonic development,the establishment of polarity along anterior/posterior,dorsal/ventral,or medial/lateral axis is called:

Pheromone is

Which is the correct order for the rate of sulphonation of benzene?

......... is a living chemical.