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The pH of 0.1 M solution of the following salts increases in the order

Options

  1. AN a C l < N H 4 C l < N a C N < H C l
  2. BH C l < N H 4 C l < N a C l < N a C N
  3. CN a C N < N H 4 C l < N a C l < H C l
  4. DH C l < N a C l < N a C N < N H 4 C l

Correct answer

B. H C l < N H 4 C l < N a C l < N a C N

Step-by-step solution

HCl: Strong acid (low pH) N H 4 C l : Salt of weak base + strong acid → it gives acidic solution. (pH less than 7) NaCl: Salt of strong base + strong base → it gives neutral solution with pH = 7. NaCl: Salt of strong base + weak acid → it gives basic solution with pH > 7. Thus the increasing order of pH is H C l < N H 4 C l < N a C l < N a C N

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