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NEET2019ChemistryIonic EquilibriumActual

Which of the following cannot act both as Bronsted acid and as Bronsted base?

Options

  1. AHCO ₃⁻
  2. BNH ₃
  3. CHCl
  4. DHSO ₄⁻

Correct answer

C. HCl

Step-by-step solution

Key Idea Bronsted acid is a substance which has a tendency to donate proton. Bronsted base is a substance which has a tendency to accept proton. HCl can act as Bronsted acid becuase it can only donate proton. HCl + H ₂ O H ₃ O ⁺+ Cl ⁻ The remaining options contains substances which act both as Bronsted acid and Bronsted base. aligned HCO ₃⁻+ HCO ₃⁻ & H ₂ CO ₃+ CO ₃²⁻ NH ₃+ NH ₃ & NH ₄⁺+ NH ₂⁻ HSO ₄⁻+ HSO ₄⁻ & H ₂ SO ₄+ SO ₄²⁻ aligned Thus, option (3) is correct.

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