It is a popping resonating sound generated by a lean condition on deceleration. When you suddenly close the throttle, the incoming air is choked off and the closed throttle also causes the bike to return to idle on the very lean idle circuit.
The reactivity series of metals was deduced by performing several experiments in the lab which enabled scientists to arrange metals according to their reactivity with dilute acid, oxygen (air), and water.xides of iron and copper are insoluble. Metals that are less reactive than copper like silver, gold and platinum do not react with oxygen. Note: When aluminum reacts with oxygen, a layer of aluminum oxide adheres and covers the aluminum.
Here is an impressive and affordable lab activity that gives consistent results in just a matter of minutes! Students perform a redox reaction between aluminum wire and a copper(II) salt.he progress of the reaction is followed by observing the disappearance of the green-blue copper color and the formation of solid copper on the wire. Using stoichiometric calculations, students predict the amount of aluminum that should react and compare this value to the actual amount of leftover aluminum.