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

KCN $K_{2} S O_{4}$ $(N H_{4})_{2} C_{2} O_{4}$ $N a C l$ $Z n (N O_{3})_{2}$ $F e C l_{3}$ $K_{2} C O_{3}$ $N H_{4} N O_{3}$
$L i C N$

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Solution

Basic salt solutions will have pH > 7. These will change the colour of litmus paper from red to blue

Here, $K C N, K_{2} C O_{3}$ and $L i C N$ are the only basic salts. So, the answer will be 3.

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

K C N, K_{2} {S O}_{4}, {({N H}_{4})}_{2} {C_{2} O}_{4}, N a C l, Z n {({N O}_{3})}_{2}, F e {C l}_{3}, K_{2} C O_{3}, {N H}_{4} {N O}_{3}, L i C N

Q. Among the following, the total number of compounds whose aqueous solution turns red litmus to blue is:

K C N, K_{2} {S O}_{4}, {({N H}_{4})}_{2} C_{2} O_{4}, N a C l, Z n {({N O}_{3})}_{2}, F e {C l}_{3}, K_{2} {C O}_{3}, {N H}_{4} {N O}_{3}, L i C N

Q. Amongst the following, the total no. of compound whose aq. Solution turn red litmus paper blue is______.

K C N, K_{2} {S O}_{4}, ({N H}_{4})_{2} C_{2} O_{4}, N a C l, Z n ({N O}_{3})_{2}, F e {C l}_{3}, K_{2} {C O}_{3}, {N H}_{4} {N O}_{3}, L i C N

Q. Aqueous solution of which of the following salts turns the red litmus blue?

When a red litmus paper is dipped in the aqueous solution of $X$ there is no change in colour.
When a blue litmus paper is dipped in the same solution it turns red.
Which among the following options can be the chemical $X$ ?

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Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is ___ KCN K2SO4 (NH4)2C2O4 NaCl Zn(NO3)2 FeCl3 K2CO3 NH4NO3 LiCN

Basic salt solutions will have pH > 7. These will change the colour of litmus paper from red to blue Here, KCN,K2CO3 and LiCN are the only basic salts. So, the answer will be 3.

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

KCN $K_{2} S O_{4}$ $(N H_{4})_{2} C_{2} O_{4}$ $N a C l$ $Z n (N O_{3})_{2}$ $F e C l_{3}$ $K_{2} C O_{3}$ $N H_{4} N O_{3}$
$L i C N$

Basic salt solutions will have pH > 7. These will change the colour of litmus paper from red to blue

Here, $K C N, K_{2} C O_{3}$ and $L i C N$ are the only basic salts. So, the answer will be 3.