Which of the following ion is stable in aqueous solution ?
Correct answer: C. Cl-
- A. H+
- B. H-
- C. Cl-
- D. All are stable
Explanation
Cl- is stable in aqueous solution because it is the conjugate base of a strong acid and is surrounded by hydrated water molecules without reacting significantly. The likely mistake is H+, but free H+ is represented in water as H3O+, and H- reacts rapidly with water to form H2 and OH-.
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About Real and Ideal Gases
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
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