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Anomalous Behaviour of Fluorine

30. select in...

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30. select incorrect among the following (1) levelling effect of water indicate mineral acids appear to be equally strong due to its complete ionisation (2)order of acidic strength in ch3cOOh solvent is HNO3

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Q. Very strong acids, such as

H N O_{3}

H C l

, appear to be equally strong in water. This "leveling effect" of water is because

Q. Strength of acid-base is influenced by solvent water. Select the correct statement(s) about the leveling effect of water on the strength of acid-base.

Q. Assertion :It is difficult to distinguish the strengths of the strong acids such as

H C l, H_{2} S O_{4}, H N O_{3}, H B r o r H C l O_{4}

in dilute aqueous solutions. Reason: In dilute aqueous solution all strong acids donate a proton to water and are essentially 100 % ionised to produce a solution all strong acids

Q. Mineral acids are stronger acids than carboxylic acids because:
(i) Mineral acids are completely ionised in aq. solution.
(ii) Carboxylic acids are completely ionised in aq. solution.
(iii) Mineral acids are partially ionised in aq. solution.
(iv) Carboxylic acids are partially ionised in aq. solution.

H_{3} O^{+}

is the strongest acid in aqueous solution. Reason: Water levels the strength of all strong acids to the strength of hydronium ions.

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