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

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Which of the following reactions leads to the formation of a substance in the colloidal state:-
A. `Cu+HgCl_(2)toCuCl_(2)+Hg`
B. `2HNO_(3)+3H_(2)Sto3S+4H_(2)O+2NO`
C. `2Mg+CO_(2)to2MgO+C`
D. `Cu+CuCl_(2)toCu_(2)Cl_(2)`
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Correct Answer - B
`2HNO_(3)+3H_(2)Stounderset((sol))(3S)+4H_(2)O+2NO`
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