Which one of the following compounds give aspirin on reacting with acetic anhydride in the presence of conc. H₂SO₄ ?

The reagent used for converting acetylene to oxalic acid is

• HgSO₄/ aqueous H₂SO₄

• HgSO₄/ CH₃COOH

• KMnO₄/ KOH, 25°C

• Cr₂O₃/ H₂SO₄

Acid hydrolysis of X yields two different organic compounds. Which one of the following is X?

• CH₃COOH

• CH₃CONH₂

• CH₃COOC₂H₅

• (CH₃CO)₂O

Acetaldehyde forms a white crystalline precipitate on mixing with a ...... solution of ........

• acidic, Zn— Hg

• alcoholic, Na₂SO₃

• saturated aqueous, NaHSO₃

• aqueous, NaCl

665.

Identify 'acetaldoxime'

• CH₃CH=N-NH₂

• CH₃CH=N-OH

• (CH₃)₂C=N-OH

• CH₂≡N-OH

Which one of the following functional groups undergoes hydrolysis with alkali to yield an acid group?

• -CN

• -CHO

• -COCH₃

• -Br

Which of the following, compounds is 'the reactant in Rosenmund's reduction?

• CH₃CO₂H

• CH₃CHO

• CH₃CH₂Cl

• CH₃COCl

Which of the following reagents can form a hydrazone with alkanone ?

• NH₃OHCl

• PhNHNH₂

• NH₂NHCONH₂

• HCN

3-hydroxybutanal is formed when (X) reacts with (Y) in dilute (Z) solution. What are X,Y  and Z?

• $\underset{\left(\mathrm{X}\right)}{{\mathrm{CH}}_3\mathrm{CHO}},\underset{\left(\mathrm{Y}\right)}{ ({\mathrm{CH}}_3{)}_2\mathrm{CO}}, \underset{\left(\mathrm{Z}\right)}{\mathrm{NaOH}}$

• $\underset{\left(\mathrm{X}\right)}{{\mathrm{CH}}_3\mathrm{CHO}}, \underset{\left(\mathrm{Y}\right)}{{\mathrm{CH}}_3\mathrm{CHO},} \underset{\left(\mathrm{Z}\right)}{\mathrm{NaCl}}$

• $\underset{\left(\mathrm{X}\right)}{({\mathrm{CH}}_3{)}_2\mathrm{CO},} \underset{\left(\mathrm{Y}\right)}{({\mathrm{CH}}_3{)}_2\mathrm{CO}},\underset{\left(\mathrm{Z}\right)}{ \mathrm{HCl}}$

• ${\mathrm{CH}}_3\mathrm{CHO}, {\mathrm{CH}}_3\mathrm{CHO}, \mathrm{NaOH}$

In the reaction $\underset{\left(\mathrm{vapour}\right)}{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}} \underset{300°\mathrm{C}}{\overset{\mathrm{Cu}}{\to }} \mathrm{X}$. The molecular formula of X is

• C₄H₆O

• C₄H₁₀O

• C₂H₄O

• C₂H₆