The compound that does not give an iodoform test is:

1. 3-Pentanone

2.  2-Pentanone

3.  Ethanol

4.  Ethanal

A molecule among the following that does not give Claisen condensation reaction is:

1.  ${\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5$

2. ${\text{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2{\mathrm{COOC}}_2{\mathrm{H}}_5$ 

3. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{COOC}}_2{\mathrm{H}}_5$

4.  None of the above

Ethylbenzene is obtained from phenyl methyl ketone by using:

1. Zn–Hg+HCl

2. LiAlH₄

3. KMnO₄

4. None of the above

Acetaldehyde reacts with semicarbazide to yield the following as a product:

1.	\( {CH_3CH=NHNH_2} ~\)
2.	\({CH_3CH=NCONHNH_2}~~~\)
3.	\({CH_3CH=NNH-CO-NH_2}~~~~~\)
4.

Cyanohydrin of which of the following compounds on hydrolysis gives an optically active product:

1. HCHO

2. ${\mathrm{CH}}_3\mathrm{CHO}$

3. ${\mathrm{CH}}_3{\mathrm{COCH}}_3$

4. All of the above

Clemmensen reduction reaction is:

1.
2.	\(C_6H_5-CO-CH_3 + NH_2NH_2 \xrightarrow{C_2H_5ONa}\\ C_6H_5CH_2CH_3\)
3.	\(CH_3COCH_3 + 4HI \xrightarrow{\text{Red. P}} CH_3CH_2CH_3\)
4.	All of the above

Ethyl benzoate can be prepared from benzoic acid by using:

1. Propyl alcohol

2. Ethyl alcohol and dry HCl

3. Ethyl chloride

4. Sodium ethoxide

RCHO and NH₂NH₂ react with each other in an acidic medium. The product obtained is:

1. RCON₃

2. RCH=NH

3. RCH₂NH₂

4. RCH=NNH₂

Reduction by LiAlH₄ of hydrolyzed product of an ester gives:

1. Two alcohols

2. Two aldehyde

3. One acid and one alcohol

4. Two acids

Intermediates formed during the reaction of ${\mathrm{RCNH}}_2$
$$ $$ $$ $\left|\right|$
$$ $$ $$ $\mathrm{O}$ with ${\mathrm{Br}}_2$ and KOH are:

1. RNHCOBr and RNCO

2. RCONHBr and RNCO

3. RNH-Br and RCONHBr 

4. RCON${\mathrm{Br}}_2$