# NEET Chemistry Surface Chemistry Questions Solved

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

(A)

(B)

(C)

(D)

(A). Due to oxidation of ${\mathrm{H}}_{2}\mathrm{S}$ by ${\mathrm{HNO}}_{3}$ colloidal particles of sulphur $\left({\mathrm{S}}_{8}\right)$ are formed. In other

cases, particles of colloidal size are not formed.

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