Which of the following statement(s) is/are correct about the elimination reaction of 2-Bromopentane to form pent-2-ene?
a. $\mathrm{\beta }$-Elimination reaction
b. Follows Zaitsev rule
c. Dehydrohalogenation reaction
d. Dehydration reaction
1. (a), (c), (d)
2. (b), (c), (d)
3. (a), (b), (d)
4. (a), (b), (c)

Which of the following is a free radical substitution reaction ?

1. Benzene with Br₂/AlCl₃

2. Acetylene with HBr

3. Methane with Br₂/hv

4. Propene with HBr/(C₆H₅COO)₂

An alkene "A" on reaction with ${\mathrm{O}}_3$ and $\mathrm{Zn}-{\mathrm{H}}_2\mathrm{O}$ gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is:

1.  ${\mathrm{H}}_3\mathrm{C}-\underset{\mathrm{Cl}}{\underset{|}{\mathrm{CH}}}-\underset{{\mathrm{CH}}_3}{\overset{{\mathrm{CH}}_3}{\underset{\left|}{\overset{\right|}{\mathrm{CH}}}}}$

2.  $\mathrm{Cl}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\underset{{\mathrm{CH}}_3}{\overset{{\mathrm{CH}}_3}{\underset{\left|}{\overset{\right|}{\mathrm{CH}}}}}$

3.  ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-\stackrel{{\mathrm{CH}}_2\mathrm{Cl}}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_3$

4.  ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-\underset{\mathrm{Cl}}{\overset{{\mathrm{CH}}_3}{\underset{\left|}{\overset{\right|}{\mathrm{C}}}}}-{\mathrm{CH}}_3$

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