Information about four solutions, P, Q, R and S, is listed.
- Solution P reacts with ammonium chloride to form ammonia.
- Solution Q reacts with sodium carbonate to form carbon dioxide.
- Solution R contains a high concentration of OH$^-$ ions.
- Solution S turns litmus red.
Which solutions are alkaline?
1 )
P and Q
P and R
3 )
Q and S
4 )
R and S
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