NEET Chemistry Aldehydes, Ketones and Carboxylic Acids Questions Solved

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 separation 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)