1.

Among of electrolytes N_(24)a_2 S_2 and NH_4O the most effective agent for Sb_(23)_S sol is:

Answer»

`N_2a_4S`
`CaC_2`
`A_2l_2C_3S`
`NH_4O`

Solution :For negatively CHARGED sol, like `Sb_2S_3` the coagulating power of electrolyte is directly proportional to the fourth power of the valency of the EFFECTIVE ION (cation). In this case the ORDER of effectiveness is `A^3F^3C`


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