22695.Clemmensen reduction of a ketone is carried out in the presence of which of the following?
H2 and Pt as catalyst
Glycol with KOH
Zn–Hg with HCl
LiAlH4
22696.The compound that yields only ketonic compound/s on ozonolysis is
But–2–ene
Pent–2–ene
2, 3–Dimethylbut–2–ene
2–Methylbut–2–ene
22697.The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits
geometrical isomerism
optical isomerism
both optical and geometrical isomerism
neither optical nor geometrical isomerism
22698.Which of the following has most acidic hydrogen?
3–Hexanone
2, 4–Hexanedione
2, 5–Hexanedione
2, 3–Hexanedione
22699.Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
22700.Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
Cope reduction
Dow reduction
Wolff–Kishner reduction
Clemmensen reduction
22701.$P \underset{2.H_3O^+}{\xrightarrow{\;\;1.CH_3MgBr\;\;}} R \underset{\triangle}{\xrightarrow{\;\;1.dil.NaOH\;\;}}\text{4–methylpent–3–en–2–one}$
P is
P is
propanone
ethanamine
ethanenitrile
ethanal
22702.Benzaldehyde and acetone can be best distinguished using
hydrazine
Tollen's reagent
sodium hydroxide solution
2, 4–DNP
22703.Which of the following statements is not correct?
Aldehydes and ketones undergo nucleophilic addition
Aldehydes and ketones undergo electrophilic substitution
Aldehydes and ketones contain polar carbonyl group
Lower members of aldehydes and ketones are soluble in water due to hydrogen bonding
22704.In which of the following reactions new carbon–carbon bond is not formed
Cannizzaro reaction
Wurth reaction
Aldol condensation
Friedel–Craft's reaction