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Amonst the following, the total number ...

Amonst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is:
`{:(KCN,K_(2)SO_(4),(NH_(4))_(2)C_(2)O_(4),NaCI),(Zn(NO_(3))_(2),FeCI_(3),K_(2)CO_(3),NH_(4)NO_(3)),(LiCN, , ,):}`

Text Solution

Verified by Experts

Basic solution will convert red litmus blue.
`{:(KCN),(K_(2)CO_(3)),(LICN):}}` Their aqueous solution will be basic due to anionic hydrolysis.
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