1.

Pure and dry Air is passed over soda lime and potash solution and then through a long tube containing red hot copper. The remaining air is passed over heated magnesium ribbon Which of the following are removed when air is passed through soda lime and potash

Answer»

`O_2`
`N_2`
`CO_2`
`CO_2` and WATER vapour

SOLUTION :`2Cu + O_2 to 2CuO`
`3Mg+ N_2 to Mg_3 N_2`
for COMPLETE REMOVAL of `O_2 and N_2` the AIR obtaned after removal of `CO_2 and H_2O` is repeatedly passed over heated Cu and Mg.
`C + O_2 to CO_2`


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