Acidity of Carboxylic Acids

Q.

1. Strong acids

2. Weak acids

3. Strong when in water

4. None of these

Q. ___ are oxidized to acids by heating them with solutions of potassium permanganate (KMnO ₄) or potassium dichromate (K ₂Cr ₂O ₇).

1. Alkenes
2. Alkynes
3. Alkanes
4. Alkyl Halides

Q. The correct order of acid character of the following compounds is :

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1. $II>III>IV>I$
2. $I>II>III>IV$
3. $III>II>I>IV$
4. $IV>III>II>I$

Q. What is the main reason for the fact that carboxylic acids can undergo ionization

1. Absence of $\alpha -$hydrogen

2. Resonance stabilisation of the carboxylate ion

3. Hydrogen bonding

4. High reactivity of $\alpha -$hydrogen

Q.

When propionic acid is treated with aqueous sodium bicarbonate, $C{O}_2$ is liberated. The C of $C{O}_2$ comes from:

1. Methyl group

2. Carboxylic acid group

3. Bicarbonate group

4. Methylene group

Q. When propionic acid is treated with aqueous sodium bicarbonate $C{O}_2$ is liberated. The ‘C’ of $C{O}_2$ comes from

1. Methyl group

2. Carboxylic acid group

3. Methylene group

4. Bicarbonate

Q. Consider the acidity of the carboxylic acids

1. PhCOOH
2. $o-N{O}_2{C}_6{H}_{4}COOH$
3. $p-N{O}_2{C}_6{H}_{4}COOH$
4. $m-N{O}_2{C}_6{H}_{4}COOH$

Q. Which H atom in the following ester is most acidic?
$\stackrel{1}{C}{H}_3-\stackrel{1}{C}{H}_2-\stackrel{\stackrel{O}{||}}{C}-\stackrel{3}{C}{H}_2-\stackrel{\stackrel{O}{||}}{C}-O-C{\stackrel{4}{H}}_2\stackrel{5}{C}{H}_3$

1. 1
2. 2
3. 3
4. 4

Q. Among the following acids which has the lowest pKA value

1. $C{H}_{3}COOH$
2. $(C{H}_3{)}_{2}CH-COOH$
3. $C{H}_{3}C{H}_{2}COOH$
4. HCOOH

Q. Which one is strongest acid

1. $CHC{l}_{2}COOH$
2. $CH{F}_{2}COOH$
3. $C{H}_{2}FCOOH$
4. $C{H}_{2}ClCOOH$