Choose acids that are showing leveling effect:i) HClO4 ii)HI iii) HCI iv) HF
Correct answer: D. i, ii, & iii
- A. i & iv
- B. i, iii, & iv
- C. iii & iv
- D. i, ii, & iii
Explanation
Leveling effect or solvent leveling refers to the effect of solvent on the properties of acids and bases. The strength of a strong acid is limited ("leveled") by the basicity of the solvent. Similarly the strength of a strong base is leveled by the acidity of the solvent Thus H2O is a differentiating solvent for HI HCl HClO4.HF is a weak acid so it doesn't show levelling effect.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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