1.

A mixture of CO and CO_(2) having a volume of 20 mL is mixed with X mL of oxygen and electrically sparked. The volume after explosion is 16 + X mL under the same conditions. What would be the residual volume if 30 mL of the original mixture is treated with aqueous NaOH?

Answer»

12 mL
10 mL
9 mL
8 ml

Solution :`2CO+O_(2) to 2CO_(2)`, VOLUME of `O_(2)` consumed = (20+ X)-(16+ X) = 4 mL
`"Volume of CO in 20 ml"= 2 XX 4 = 8 mL`
`"Volume of CO in 30 mL"= (8)/(20) xx 30 = 12ML` = volume of residual gas (`CO_(2)` is absorbed by NaOH)


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