1.

Which may be added to one litre of water to act a buffer?A. One mole of `CH_(3)COOH` and one mole of `HCl`B. One mole of `NH(4)OH` and one mole of `NaOH`.C. One mole of `NH_(4)Cl` and one mole of `HCl`D. One mole of `CH_(3)COOH`and `0.5`mole of `NaOH`.

Answer» `HC_(2)H_(3)O_(2)+NaOH+C_(2)H_(2)O_(2)Na+H_(2)O`
`{:(n_(i),1,0.5,0,0),(n_(f),0.5,0,0.5,0.5):}`
This solution contain weak acid & its salt with strong base and thus acts as buffer.


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