Among the following, the total number of compounds whose aqueous solution turns red litmus to bl... VIDEO
Among the following, the total number of compounds whose aqueous solution turns red litmus to blue is :
\( \mathrm{KCN}, \mathrm{K}_{2} \mathrm{SO}_{4},\left(\mathrm{NH}_{4}\right)_{2} \mathrm{C}_{2} \mathrm{O}_{4}, \mathrm{NaCl}, \mathrm{Zn}\left(\mathrm{NO}_{3}\right)_{2}, \mathrm{FeCl}_{3} \), \( \mathrm{K}_{2} \mathrm{CO}_{3}, \mathrm{NH}_{4} \mathrm{NO}_{3}, \mathrm{LiCN} \)
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