A stream of air was successively passed through three tubes X, Y and Z containing a concentrated aqueous solution of KOH, red hot copper powder and fused calcium chloride respectively. What was the composition of the gas emanating from tube Z?
-
A.
CO2 ad ithe inert gases -
B.
N2, CO2 and the inert gases -
C.
N2 and the inert gases -
D.
water vapour, N2 and the inert gases