Chemical and Ionic Equilibrium 2 Question 51
51. Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is
| $\mathrm{KCN}$ | $\mathrm{K}{2} \mathrm{SO}{4}$ | $\left(\mathrm{NH}{4}\right){2} \mathrm{C}{2} \mathrm{O}{4}$ | $\mathrm{NaCl}$ | |
|---|---|---|---|---|
| $\mathrm{Zn}\left(\mathrm{NO}{3}\right){2}$ | $\mathrm{FeCl}_{3}$ | $\mathrm{~K}{2} \mathrm{CO}{3}$ | $\mathrm{NH}{4} \mathrm{NO}{3}$ | |
| $\mathrm{LiCN}$ | (2010) |
Subjective Questions
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Solution:
- Basic salts solution will have $\mathrm{pH}>7$, will change colour of litmus paper red to blue
$\mathrm{KCN}, \mathrm{K}{2} \mathrm{CO}{3}$ and $\mathrm{LiCN}$ are the only basic salts among these.
