1.

The decomposition of a certain mass of CaCO_(3) gave 11.2 dm^(3) of CO_(2) gas at STP. The mass of KOH required to completely neutralise the gas is

Answer»

56 g
28 g
42 g
20 g

Solution :Weight of `11.2 DM^(3)` of `CO_(2)` GAS at STP is
`44//2=22g`
`underset(56 g)(KOH)+underset(44 g)(CO_(2))to KHCO_(3)`
KOH REQUIRED for complete NEUTRALISATION of 22 g `CO_(2)` is
`(56)/(44)xx22=28 g`.


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