Aldehydes, Keto...

Which of the following will be most readilly dehydrated in acidic conditions

When ethanal is heated with Fehling’s solution it gives a precipitate of

During reduction of carbonyl compounds by hydrazine and KOH, the first intermediate formed is

The cyanohydrin of a compound X on hydrolysis gives lactic acid ; The X is

Clemmensen reduction of a ketone is carried out in presence of

A substance C₄HO yields on oxidation a compound, C₄H₈O which gives an oxime and a positive iodoform test. The original substance on treatment with conc. H₂SO₄ gives C₄H₈.the structure of the compound is

The most reactive compound towards formation of cyanohydrin on treatment with KCN followed by acidification is

A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

Which of the following statements regarding chemical properties of acetophenone are wrong ?
I. It is reduced to methylphenylcarbinol by-sodium and ethanol
II. It is oxidised to benzoic acid with acidified KMnO₄
III. It does not undergo electrophilic substitution like nitration at meta position
IV. It does not undergo iodoform reaction with iodine and alkali