Which alkene on ozonolysis gives ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$ and  $$\begin{gathered} C{H}_{3}CC{H}_3 \\ \left|\right| \\ O \end{gathered}$$  ?

1.

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CHCH}}_2{\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CHCH}}_3$

4. 

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

Ozonolysis of buta-1,3-diene gives:

1. HCHO and glyoxal

2. ${\mathrm{CH}}_3\mathrm{CHO}$ and glyoxal

3. ${\mathrm{CO}}_2$ and glyoxal

4. HCHO + glyoxal + ${\mathrm{CH}}_3\mathrm{CHO}$

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

The most suitable reagent among the following that is used to distinguish compound (III) from the rest of the compounds is -

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

1. ${\mathrm{Br}}_2$/${\mathrm{CCl}}_4$

2. ${\mathrm{Br}}_2$/${\mathrm{CH}}_3\mathrm{COOH}$

3. Alk.${\mathrm{KMnO}}_4$ 

4. Ammoniacal ${\mathrm{AgNO}}_3$

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

Ozonolysis of will give:

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/species are aromatic in character?

     A                      B                          C                               D

1. B

2. C

3. D

4. A