1.

In reaction CaF_(2)+H_(2)SO_(4)rarrCaSO_(4)+2HF 6kg of CaF_(2) are treated with an excess of H_(2)SO_(4) and yield 2.0kg of HF. Percentage yield of reaction is:

Answer»

0.5
0.39
0.65
0.79

Solution :`n_(HF)=0.1`
`n_(CaF_(2))"USED"=(0.1)/(2)`
`w_(CaF_(2))"used"=3.9kg`
`% "yiled"=(3.9)/(6)xx100=65%`


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