Hydroxylation of propyne in the presence of ${\mathrm{HgSO}}_4/{\mathrm{H}}_2{\mathrm{SO}}_4$ is initiated by the attack of:

1. carbene 

2. free radical

3. electrophile

4. nucleophile

Which products are obtained from the ozonolysis of buta-1,3-diene?

1. Formaldehyde and glyoxal  
2. Acetaldehyde and glyoxal  
3. Carbon dioxide and glyoxal  
4. Formaldehyde, glyoxal, and acetaldehyde

A mixture of ethane, ethene and ethyne is passed through an ammoniacal ${\mathrm{AgNO}}_3$ solution. The gases that remain unreacted are-

1. Ethane and Ethene 

2. Ethane and Ethyne

3. Ethene and Ethyne 

4. Ethane only

Which is the most suitable reagent among the following to distinguish compound (III) from rest of the compounds?

I. ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$

II. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

III. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{C}\equiv \mathrm{CH}$

IV. ${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2$

The reaction, 

${\mathrm{C}}_6{\mathrm{H}}_6$ + ${\mathrm{CH}}_3\mathrm{Cl}\underset{{\mathrm{AlCl}}_3}{\overset{\mathrm{Anhydrous}}{\to }}$${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3$ + HCl

is an example of:

1. Friedel-Crafts reaction

2. Kolbe's synthesis

3. Wurtz's reaction

4. Grignard synthesis

What product(s) will be obtained from the ozonolysis of the compound shown below?

1.		2.
3.		4.	None of the above

2-Methylpropene and But-1-ene can be distinguished by:

1. Baeyer's reagent

2. Ammoniacal ${\mathrm{AgNO}}_3$

3. ${\mathrm{Br}}_2$ solution 

4. ${\mathrm{O}}_3$, $\mathrm{Zn}/{\mathrm{H}}_2\mathrm{O}$

An octane number 100 is given to:

1. n-hexane

2. Iso-octane 

3. neo-pentane

4. neo-octane 

Which of the following molecules is aromatic in character?

1. B

2. C

3. D

4. A

Xylene, on oxidation with acidic ${\mathrm{KMnO}}_4$, gives: