Reductions Involving Aldehydes or Ketones

Q. Acetophenone on reduction with Zn/Hg in the presence of HCl gives

1. Toluene
2. Benzene
3. Ethyl benzene
4. Xylene

Q.

Which will give silver mirror test with Tollensreagent :

1. HCOOH

2. All of these

3. C6H5CHO
4. CH3-CHO

Q.

The appropriate reagent for the following transformation:

1. Zn(Hg), HCl
2. NH2NH2, OH-
3. H2/Ni
4. NaBH4

Q. But-2-enal on reduction with hydro borane (9-BBN) gives

1. But-1-ene
2. Butane
3. But-2-en-1-ol
4. Butanal

Q. Acetone on reaction with Zn(Hg), HCl gives

1. propane
2. Acetaldehyde, $C{O}_2$
3. Acetic acid
4. Ethyl alcohol

Q.

Acetaldehyde cannot give:

1. Iodoform test

2. Tollens test

3. Lucas test
4. Benedict test

Q. Acetophenone is reduced by $LiAl{H}_4$ to

1. Toluene
2. Ethyl benzene
3. 1-Phenylethanol
4. Phenol

Q.
The above reaction and reagent are respectively -

1. $Cannizaroreaction,NaOH$
2. $Aldolcondesnation,O{H}^{⊝}$
3. $Tischenkoreaction,Al(O{C}_2{H}_5{)}_3$
4. $Perkinreaction(C{H}_{3}CO{)}_{2}O$

Q.

1‑propanol & 2‑propanol can be best distinguished by:

1. Oxidation with acedic dichromate followed by reaction with Fehling solution
2. Oxidation with alkaline KMnO4 followed by reaction with Fehling solution
3. Oxidation by heating with copper followed by reaction with Fehling solution
4. Oxidation with concentrated H2SO4 followed by reaction with Fehling

Q. Acetaldehyde reacts with ethyl magnesium bromide to give a product which on hydrolysis gives

1. Butan-1-ol
2. 2-methylpropan-2-ol
3. Butan-2-ol
4. Pentan-1-ol