Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is `KCN \ \

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Q 2656623574.     Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is

`KCN \ \ \ \ \ \ \ \ \ K_2SO_4 \ \ \ \ (NH_4)_2 C_2O_4 \ \ \ \ NaCl`
`Zn(NO_3)_2 \ \ \ FeCl_3 \ \ \ K_2 CO_3 \ \ \ \ \ \ \ \ \ \ \ NH_4 NO_3`
`LiCN`
JEE 2010

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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