Identify A and predict the type of reactions


1.   and substitution reaction         

2. and elimination addition reaction

3.   and cine substitution reaction   

4.      and cine substitution reaction

1.  

2.  

3.  

4.  

What is the major product in the given following reaction under cold condition?

1.  

2.  

3.  

4.  

Incorrect method for the preparation of ${\mathrm{Me}}_3\mathrm{COMe}$ in good yield is

1.  ${\mathrm{Me}}_3\mathrm{CCl}+\mathrm{MeONa} \to$

2.  ${\mathrm{Me}}_2\mathrm{C}={\mathrm{CH}}_2\underset{\left(\mathrm{ii}\right){\mathrm{NaBH}}_4}{\overset{\left(\mathrm{i}\right)\mathrm{H}\mathrm{g}(\mathrm{O}{\mathrm{Ac}}_2/\mathrm{MeOH}}{\to }}$

3.  ${\mathrm{Me}}_3\mathrm{CONa}+\mathrm{MeCl}⟶$

4.  ${\mathrm{Me}}_2\mathrm{C}={\mathrm{CH}}_2\underset{\mathrm{meOH}}{\overset{\mathrm{H}}{\to }}$

An organic compound A reacts with sodium metal and forms B. On heating with conc. H₂SO₄, A gives diethyl ether. So A and B are                                                              [AFMC 1998]

1. C₃H₇OH and CH₃ONa

2. CH₃OH and CH₃ONa

3. C₄H₉OH and C₄H₉ONa

4. C₂H₅OH and C₂H₅ONa

On boiling with concentrated hydrobromic acid phenyl ethyl ether yields:-

1. Phenol and ethyl bromide

2. Bromobenzene and ethanol

3. Phenol and ethane

4. Bromobenzene and ethane

The electrophile involved in the above reaction is:
1. dichloromethyl cation ($\stackrel{\oplus }{\mathrm{C}}{\mathrm{HCl}}_2$)
2. dichlorocarbene (:CCl₂)
3. trichloromethyl anion ($\stackrel{⊝}{\mathrm{C}}{\mathrm{Cl}}_3$)
4. formyl cation ($\stackrel{\oplus }{\mathrm{C}}\mathrm{HO}$)

Phenol is weakly acidic but does not react with NaHCO₃ like carboxylic acids hence:-

1. phenol is weaker than carbonic acid
2. phenol is stronger than carbonic acid
3. phenol is stronger than carboxylic acid
4. none of the above

A characteristic group test for phenolic gp. is:

1. Liebermann's nitroso reaction
2. coupling with diazonium salt

3. aqueous  FeCl₃ solution test
4. all of the above

Phenol on oxidation gives chloranil. The oxidant used is:

1. K₂S₂O₈

2. KMnO₄

3. KCIO₃ + HCl

4. none of these