A hydrocarbon has molecular formula $C_8{H}_{12}$. In this hydrocarbon only one $H_2$ molecule can be added. On ozonolysis it gives symmetrical diketone. The hydrocarbon is

1.

2.

3.

4. All of the above

 In which of the following homolytic bond fission takes place.

1. Alkaline hydrolysis of ethyl chloride

2. Addition of HBr to double bond

3. Photochlorination of methane

4. Nitration of benzene

${\mathrm{CH}}_3-\underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}}-\mathrm{CH}={\mathrm{CH}}_2+\mathrm{HBr}\to \left(\mathrm{Major}\right)$

The compound 'A' is 

1. ${\mathrm{CH}}_3-\underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{Br}$

2.  ${\mathrm{CH}}_3-\underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}}-\underset{\hspace{0.17em}\mathrm{Br}}{\underset{|}{\mathrm{CH}}}-{\mathrm{CH}}_3$

3.  ${\mathrm{CH}}_3-\underset{{\mathrm{CH}}_3}{\underset{|}{\stackrel{\mathrm{Br}}{\stackrel{|}{\mathrm{C}}}}}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

4.  $\underset{\hspace{0.17em}\mathrm{Br}}{\underset{|}{{\mathrm{CH}}_2}}-\underset{{\mathrm{CH}}_3}{\underset{|}{\mathrm{CH}}}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

In the nitrating mixture $(H_{2}S{O}_4 and HN{O}_3), HN{O}_3$ acts as

1. Acid

2. Base

3. Acid as well as base

4. Neither acid nor base

The most reactive compound among the following towards electrophilic substitution reaction is:

1.		2.
3.		4.

In the following reaction,

the number of ($\sigma$) bonds present in the product (A) is-

The alkane that gives only one monochloro product on chlorination with $C{l}_2$ in presence of diffused sunlight is -

1. 2,2,-Dimethylbutane

2. Neopentane

3. n-Pentane

4. Isopentane

The most suitable reagent for the following conversion, is:

1.  ${\mathrm{Hg}}^{2+}/{\mathrm{H}}^{+} , {\mathrm{H}}_2\mathrm{O}$

2.  Na/liquid NH₃

3.  H₂, Pd/C, quinoline

4.  Zn/HCl

Which of the compounds with molecular formula C₅H₁₀ yields acetone on ozonolysis?

1. 2-methyl-2-butene

2. 2-methyl-1-butene

3.  Cyclopentane

4. 3-methyl-1-butene