Acetals are:

1. Aldehyde

2. Diethers

3. Ketones

4. Hydroxy aldehyde

The correct order of reactivity of >CO group in given compounds is:

(1) 

(2) 

(3) 

(4) 

Ketones are first oxidation product of:

(1) primary alcohols

(2) secondary alcohols

(3) dilhydric alcohols

(4) trihydric alcohols

Alkaline hydrolysis of R₂C.Cl₂ forms:

(1) propanone

(2) propane

(3) alkanone

(4) alkanal

Ketones are prepared by:

1. Clemmensen's reduction

2. Rosenmund's reduction

3. Oppeanauer's oxidation

4. Cannizzaro's reaction

Chlorine does not react with:

(1) methanal 

(2) CH₃CHO

(3) propanone

(4) C₆H₅CHO

Both acetaldehyde and ketone react with:

(1) ammoniacal AgNO₃

(2) rochelle salt

(3) 2,4-dinitro phenylhydrazine

(4) all of the above

Aldehydes are produces in atmosphere by:

(1) oxidation of secondary alcohols

(2) reduction of alkenes

(3) reaction of oxygen atoms with hydrocarbons

(4) reaction of oxygen atoms with O₃

Compound (C) in above reaction is:

(1) $\mathrm{\alpha }$-hydroxy acid

(2) $\mathrm{\alpha }$-amino acid

(3) $\mathrm{\alpha }$-amino alkanol

(4) $\mathrm{\alpha }$-amino $\mathrm{\beta }$-hydroxy acid

Which structural unit is possessed by aldehyde and not ketone?

(1) $\mathrm{\alpha }$-H-atom

(2) H-atom and carbonyl group

(3) OH and carbonyl group

(4) None of the above