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Which of the following ions does not liberate hydrogen gas on reaction with dilute acids?

Options

  1. AV 2 +
  2. BTi 2 +
  3. CMn 2 +
  4. DCr 2 +

Correct answer

C. Mn 2 +

Step-by-step solution

Mn 2 + does not displace H 2 from dilute acid because they are less reactive SRP   value . Given below are SRP values, H 2 O | H 2 = - 0 . 8277 ,   Mn 2 + | Mn = - 1 . 185   V

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