Amongst 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) " " NaCl " " Zn(NO_(3))_(2) " " FeCl_(3) " " K_(2)CO_(3) " " NH_(4)NO_(3) " " LiCN

Amongst the following, the total number of compounds whose aqueous sol

1.	Amongst 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) " " NaCl " " Zn(NO_(3))_(2) " " FeCl_(3) " " K_(2)CO_(3) " " NH_(4)NO_(3) " " LiCN
Answer» SOLUTION :KCN, `K_(2)CO_(3)` and LiCN are salts of weak acid and STRONG base. Hence, their aqueous SOLUTIONS are basic and turn red litmus PAPER blue.