NEET Practice Questions - Chemistry - Aldehydes, Ketones and Carboxylic Acids

Aldehydes and ketones will not form crystalline derivatives with                            

(a) sodium bisulphite

(b) phenyl hydrazine

(c) semicarbazide hydrochloride

(d) dihydrogen sodium phosphate

Acetone reacts with iodine $\left({\mathrm{I}}_2\right)$ to form iodoform in the presence of

(a) Ca${\mathrm{CO}}_3$          (b) NaOH          (c) KOH            (d) Mg${\mathrm{CO}}_3$

Which of the following compounds with molecular formula, C₅H₁₀ yields acetone on ozonolysis? 

(a) 2-methyl-2-butene

(b) 3-methyl-1-butene

(c) Cyclopentane

(d) 2-methyl-1-butene

Among acetic acid, phenol and n-hexanol which one of the following compound will react with NaHCO₃ solution to give sodium salt and CO₂?                                             

(a) Acetic acid

(b) n-hexanol

(c) Acetic acid and phenol

(d) Phenol

The reagent used for the preparation of acetaldehyde from acetophenone is

(1) NaHSO₃         (2) C₆H₅NHNH₂            (3) NH₂OH              (4) NaOH and I₂

Iodoform test is not given by

(a) 2-pentanone                  (b) ethanol

(c) ethanal                          (d) 3-pentanone

Two isomeric ketones 3-Pentanones and 2-pentanone can be distinguished by

(a) I₂/NaOH only               (b) NaHSO₃ only

(c) NaCN/HCl                     (d) both of (a) and (b)   

Products of the following reaction                                   

  CH₃C$\equiv$C.CH₂CH₃ $\underset{\left(\mathrm{ii}\right) \mathrm{hydrolysis}}{\overset{\left(\mathrm{i}\right) {\mathrm{O}}_3}{\to }}$ ... are

(a) CH₃CHO + CH₃CH₂CHO

(b) CH₃COOH + CH₃COCH₃

(c) CH₃COOH + HOOC.CH₂CH₃

(d) CH₃COOH + CO₂

Which alkene on ozonolysis gives CH₃CH₂CHO and CH₃COCH₃?                                          

(a) CH₃CH₂CH=C${<}_{{\mathrm{CH}}_3}^{{\mathrm{CH}}_3}$

(b) CH₃CH₂CH=CHCH₂CH₃

(c) CH₃CH₂CH=CHCH₃

(d) $$\begin{gathered} {\mathrm{CH}}_3-\underset{|}{\mathrm{C}}={\mathrm{CHCH}}_3 \\ {\mathrm{CH}}_3 \end{gathered}$$

The major organic product formed from the following reaction

 $\underset{\left(\mathrm{ii}\right) {\mathrm{LiAlH}}_4 \left(\mathrm{iii}\right) {\mathrm{H}}_2\mathrm{O}}{\overset{\left(\mathrm{i}\right) {\mathrm{CH}}_3{\mathrm{NH}}_2}{\to }}$ ... is

(a)                    (b) 

(c)                  (d)