1.

Which of the following reactions leads to the formation of a substance in the colloidal state:-

Answer»

`Cu+HgCl_(2)toCuCl_(2)+Hg`
`2HNO_(3)+3H_(2)Sto3S+4H_(2)O+2NO`
`2Mg+CO_(2)to2MgO+C`
`Cu+CuCl_(2)toCu_(2)Cl_(2)`

SOLUTION :`2HNO_(3)+3H_(2)Stounderset((sol))(3S)+4H_(2)O+2NO`


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