Acid strength is measured by the positio...

Acid strength is measured by the position of equilibrium of ionization in water. In other words acid strength is the function of the stability of conjugate base of the acid. More is the stability of conjugate base of the acid, more is the acidity of acid.
Which one of the following is strongest acid?

`CI-CH_(2) - CH_(2) - COOH`

`CI-CH_(2)-COOH`

`CI-CH_(2) - CH_(2) - CH_(2) - COOH`

`CH_(3) -COOH`

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Acid strength is measured by the position of equilibrium of ionization in water. In other words acid strength is the function of the stability of conjugate base of the acid. More is the stability of conjugate base of the acid, more is the acidity of acid. Which of the following is weakest acid?

`CH_(2)=CH-CH_(3)`

`II gt III gt IVgtI`

` II gt III gt I gt IV`

`IV gt III gt | gt I`

`Igt II gt I gt IV `