Clemmensen reduction of a ketone is carried out in the presence of which of the following?

• Zn-Hg with HCl

• LiAlH₄

• H₂ and Pt as catalyst

• Glycol with KOH

Which of the following is not a resonating form of benzaldehyde?

943.

Which one of the following does not undergo iodoform reaction?

• Secondary butyl alcohol

• Iso-propyl alcohol

• Diethyl ketone

• Ethyl alcohol

CH₃COOH $\stackrel{{\mathrm{Br}}_2/ \mathrm{P}}{\to }$ Y $\underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\left(\mathrm{i}\right) \mathrm{KCN}}{\to }}$ X

Here, X is

• glycollic acid

• $\mathrm{\alpha }$-hydroxy propionic acid

• succinic acid

• malonic acid

In electrophilic aromatic substitution reaction, the nitro group is meta directing because it

• decreases electron density at ortho and para positions

• decreases electron density at meta position

• increases electron density at meta position

• ncreases electron density at ortho and para positions

The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is

• methanal

• propanal

• propanone

• ethanal

The compound which forms acetaldehyde when heated with dilute NaOH, is

• 1,1-dichloroethane

• 1,1,1-trichloroethane

• 1-chloroethane

• 1,2-dichloroethane

Which of the following reagents converts both acetaldehyde and acetone to alkanes ?

• Ni/H₂

• LiAlH₄

• I₂/ NaOH

• Zn-Hg/ conc. HCl

The reaction,

C₆H₅CHO + CH₃COOC₂H₅ $\to$ C₆H₅CH = CHCOOC₂H₅ , is called

• Benzoin condensation

• Claisen condensation

• Cannizaro's reaction

• Perkin reaction

Which one of the following reactions is called Rosenmund reaction ?

• Aldehydes are reduced to alcohols

• Acids are converted to acid chlorides

• Alcohols are reduced to hydrocarbons

• Acid chlorides are reduced to aldehydes