Which one is most reactive towards electrophilic reagent?

 

The IUPAC name of the compound having the formula CH$\equiv$C-CH=CH₂ is

1. 3-butene-1-yne

2. 1-butyn-3-ene

3. but-1-yne-3-ene

4. 1-butene-3-yne

The relative reactivates of acyl compounds towards nucleophilic substitution are in the order of

(1) Acyl chloride > Acid anhydride > Ester > Amide

(2) Ester > Acyl Chloride > Amide > Acid anhydride

(3) Acid anhydride > amide > Ester > Acyl chloride

(4) Acyl chloride > Ester > Acid anhydride > Amide

Which one of the following is most reactive towards electrophillic attack?

(a) 

(b) 

(c) 

(d) 

A strong base can abstract an $\mathrm{\alpha }$-hydrogen from

1. alkene

2.amine

3. ketone

4. alkane

The stability of carbanions in the following

(1) $\mathrm{RC}\equiv \stackrel{⊝}{\mathrm{C}}$

(2) 

(3) ${\mathrm{R}}_2\mathrm{C}=\stackrel{⊝}{\mathrm{C}}\mathrm{H}$

(4) ${\mathrm{R}}_3\mathrm{C}-\stackrel{⊝}{\mathrm{C}}{\mathrm{H}}_2$

is in the order of

(a) (1)>(2)>(3)>(4)

(b) (2)>(3)>(4)>(1)

(c) (4)>(2)>(3)>(1)

(d) (1)>(3)>(2)>(4)

If there is no rotation of plane polarized light by a compound in a specific solvent, thought to be chiral,

it may mean that:

(1) the compound is certainly a chiral

(2) the compound is certainly meso

(3) there is no compound in the solvent

(4) the compound may be a racemic mixture

For the following :

(i) I^-

(ii) Cl^-

(iii) Br^-

the increasing order of nucleophilicity would be :

1. I^- < Br^- < Cl^-

2. Cl^- < Br^- < I^-

3. I^- < Cl^- < Br^-

4. Br^- < Cl^- < l^-

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

1. CH₃COOCH₃

2. CH₃CONH₂

3. CH₃COOCOCH₃

4. CH₃COCl

The correct order of increasing reactivity of C-X bond towards nucleophile in the following

compounds is

1. I < II < IV < III

2. II < III < I < IV

3. IV < III < I < IV

4. III < II < I < IV