What is the major product in the given following reaction?

1.
2.
3.
4.

What sequence of reagents is required to accomplish the following transformation?

1. (1) NBS, ROOR (2) CH₃CH₂O^- (3)2HBr (4) NH^-₂ (5) disiamylborane (6) H₂O₂,OH^-

2. (1) Cl₂hv (2) OH^-, heat; (3) 2HCl (4) OH-,heat (5) HgSO₄,H₂SO₄

3. (1) NBs,ROOR; OH-,DMSO

4. (1) Br₂,hv (2) t-butoxide (3) BH₃,THF (4) H₂O₂,OH^-

$\underset{{\mathrm{CH}}_2{\mathrm{Cl}}_2}{\overset{{\mathrm{Br}}_2}{\to }}$ W. Product W is:

1. 

2. 

3. 

4. 

The best method to prepare cyclohexene from cyclohexanol is by using:

1. Conc. HCl + ZnCl₂                     

2.  Conc. H₃PO₄

3. HBr                                           

4. Conc. HCl

Which of the following is the strongest acid?

1. HC $\equiv$ CH

2. C₆H₆

3. C₂H₆

4. CH₃OH

$\underset{\left(Predominant\right)}{\left(\mathrm{B}\right)}\stackrel{PB{r}_{\mathit{3}}}{\leftarrow }$$\stackrel{\mathrm{HBr}}{\to }\underset{\left(Predominant\right)}{\left(A\right)}$

(A) and (B) are respectively :

$\underset{\mathrm{heat}}{\overset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}\underset{major}{P}\stackrel{NBS}{\to }\underset{major}{Q}$

The structure of Q is?

R–CH₂–CH₂–OH can be converted into
R–CH₂–CH₂–COOH. The correct sequence of
reagents is

1. PBr₃, KCN, H₃O⁺

2. PBr₃, KCN, H₂

3. KCN, H₃O⁺

4. HCN, PBr₃, H₃O⁺

$\stackrel{{\mathrm{H}}^{+}/∆}{\to }A\left(major\right)$

The product ‘A’ is