Introduction to Carboxylic Acids

Q.

Do all amino acids give a positive xanthoproteic test?

Q.

A compound $\mathrm{C}$(molecular formula, ${\mathrm{C}}_2{\mathrm{H}}_4{\mathrm{O}}_2$) reacts with $\mathrm{Na}$ – metal to form a compound $\mathrm{R}$and evolves into a gas which burns with a pop sound. Compound $\mathrm{C}$ on treatment with an alcohol $\mathrm{A}$in presence of an acid forms a sweet-smelling compound $\mathrm{S}$ (molecular formula, ${\mathrm{C}}_3{\mathrm{H}}_6{\mathrm{O}}_2$). On addition of $\mathrm{NaOH}$ to $\mathrm{C}$, it also gives $\mathrm{R}$ and water. $\mathrm{S}$ on treatment with $\mathrm{NaOH}$ solution gives back $\mathrm{R}\mathrm{and}\mathrm{A}$. Identify $\mathrm{C},\mathrm{R},\mathrm{A},\mathrm{S}$ and write down the reactions involved?

Q. Which of the following compounds would not evolve $C{O}_2$ when treated with $NaHC{O}_3$ solution?

1. Salicyclic acid
2. Phenol
3. Benzoic acid
4. 4-Nitrobenzoic acid

Q. How to convert 2- Chloropropane to 1-Iodopropane?

Q. Which of the following is not an alkaloid?

1. Reserpine
2. Morphine
3. Quinine
4. Phenylbutazone

Q. The antifertility drug “Novestrol” can react with:

1. $ZnC{l}_2/HCl;FeC{l}_3;\text{Alcoholic}HCN$
2. $B{r}_2/\text{water};ZnC{l}_2/HCl;NaOCl$
3. $B{r}_2/\text{water};ZnC{l}_2/HCl;FeC{l}_3$
4. $\text{Alcoholic}HCN;NaOCl;ZnC{l}_2/HCl$

Q.

What are antistaling agents?

Q. Methanoic acid and Ethanoic acid can be differentiated by:

1. $\text{Fehling's test}$
2. $\text{Iodoform test}$
3. $\text{Tollens' reagent}$
4. $NaHC{O}_3\text{test}$

Q. Which of the following compound(s) would evolve $C{O}_2$ when treated with $NaHC{O}_3$ solution?

1. Salicyclic acid
2. Phenol
3. Benzoic acid
4. 4-Nitrobenzoic acid

Q. Why acetic acid dissociate in water and associate in benzene

Q. Methanoic acid and Ethanoic acid can be differentiated by:

1. $\text{Fehling's test}$
2. $\text{Iodoform test}$
3. $\text{Tollens' reagent}$
4. $NaHC{O}_3\text{test}$

Q.
The class of drug to which chlordiazepoxide with above structure belongs is:

1. Antacid
2. Tranquilizer
3. Antibiotic
4. Analgesic

Q. Which of the following products is formed in aldol condensation?

1. $\beta -$Hydroxy aldehyde or Ketone
2. $\alpha -$ Hydroxy aldehyde or Ketone
3. $\alpha ,\beta -$Unsaturated aldehyde or ketone
4. enone

Q. Paraffin wax is a/an .

1. ester
2. hydrocarbon
3. acid
4. alcohol

Q. Phenol can be prepared by:

1. Dow's process
2. Corey-House synthesis
3. Frankland Reaction
4. Wurtz reaction

Q. 4. During preparation of arenediazonium salt the excess of nitrous acid, if any, is removed by adding :- 1) Aq. Na2CO3. (2) Aq. NaOH 3) Aq. NH2CONH2. (4) NH4OH

Q. Highest electrical conductivity among 0.1 M difluoroacetic acid 0.1 M acetic acid Why wont we here account for solvation that is h bonding with h20 will make cf3cooh less mobile than acetic acid.

Q. Which of the following is a hypohalous acid?

1. $HOClO$
2. $HOBr{O}_3$
3. $HOF$
4. $HOCl{O}_3$

Q.

Match the acids given in Column (A) with their correct source given in Column (B)

Column 1	Column 2
Lactic Acid	Tomato
Acetic Acid	Lemon
Citric Acid	Vinegar
Oxalic Acid	Curd

Q. Amongst the following compounds, identify which are insoluble, partially soluble and highly soluble in water?
(i) phenol (ii) toluene (iii) formic acid (iv) ethylene glycol (v) chloroform (vi) pentanol

Q. Which of the following does not contain $-COOH$ group?

1. All have $-COOH$ group
2. Benzoic acid
3. Picric acid
4. Aspirin

Q.

28. Choose the correct alternative from the choices given below for the following statements :

Which one of the following is a pesticide?

1. benzoic acid

2. aldrin

3. sugar

4. gunpowder

Q. Benzoic acid on treatment with hydrazoic acid in presence of concentrated sulphuric acid gives?

Q. Which of the following chemical is used in removing ink stain from clothes?

1. Ethyl alcohol
2. Glycol
3. Banzoic acid
4. Oxalic acid

Q. 30.Formic acid is more acidic than? 1.Benzoic acid 2.acetic acid

Q. Tamarind contains :

1. $(\pm )$ tartaric acid
2. (-) tartaric acid
3. (+) tartaric acid
4. None of these

Q. When the mixture of $[A+B+C]$ is dissolved in $NaHC{O}_3,$ A dissolve in $NaHC{O}_3,$ $BandC$ remains as a residue. After that residue dissolves in $aq.NaOH,C$ dissolves in it and $B$ remains as residue. $A,B,C$ can be respectively.

1. 
2. 
3. 
4. 

Q. Assertion :Benzoic acid is stronger acid than acetic acid. Reason: $K_a$ for benzoic acid is $6.5\times {10}^{-5}$ and for acetic acid is $1.74\times {10}^{-5}$.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Arrange the following in order of increasing acidity.
Oxalic acid, malonic acid, succinic acid, glutaric acid

Q.

What are examples of Parabens?