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^-

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

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

Which of the following is most reactive towards electrophilic reagents?

1.		2.
3.		4.

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