The molecular speeds of gaseous molecules are analogous to those to rifle bullets , why do then odour of the gaseous molecular not detected so fast ?

Explanation

No doubt molecules in the gaseous state move alomost with the same speed of rifle bulles, but these molecules donot follow a straight path. Since they undergo collsions with one another a very fast rate, the path followed is zig-zag. Thus, the odour cannot be detected at the same speed at which the molecules move.