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A stream of air was successively passed through three tubes X, Y and Z containing a ...

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




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