The Lassaigne's extract is boiled with a concentration HNO₃ while testing for halogens. By doing so it:

1. Helps in the precipitation of AgCl.

2. Increases the solubility product of AgCl.

3. Increases the concentration of NO₃^- ions.

4. Decomposes Na₂S and NaCN, if formed.

Given is cyclohexanol (I), acetic acid (II), 2,4,6-trinitrophenol (III), and phenol (IV).

The order of decreasing acidic character will be

1. III > II > IV > I

2. II>III>I>IV

3. II > III > IV > I

4. III > IV > II > I

which one of the following has the most acidic nature?

1.		2.
3.		4.

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

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

1. CH₃COOCH₃

2. CH₃CONH₂

3. CH₃COOCOCH₃

4. CH₃COCl

Which of the following is most reactive towards electrophilic reagents?

1.		2.
3.		4.

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