The major product P will be

The product P of the given reaction is 

In the reaction 

C₇H₈ $\stackrel{3{\mathrm{Cl}}_2/ ∆}{\to }$ X $\stackrel{{\mathrm{Br}}_2/ \mathrm{Fe}}{\to }$ Y $\stackrel{\mathrm{Zn}/ \mathrm{HCl}}{\to }$ Z

Z is

• o-bromotoluene

• m-bromotoluene

• p-bromotoluene

• 3-bromo-2, 2, 6- trichlorotoluene

The molal freezing point depression constant for benzene (C₆H₆) is 4.90 K Kg mol^-1. Selenium exists as a polymer of the type Se_x. When 3.26 g of selenium is dissolved in 226 g of benzene, the observed freezing point is 0.112$°$C lower than that of pure benzene. The molecular formula of selenium is (atomic mass of Se = 78.8 g mol^-1).

• Se₈

• Se₆

• Se₄

• Se₂

X, Y and Z respectively are

Choose the correct alkyne and reagents for the preparation of

For carbanion

Stability order will be

• P > Q > S > R

• P > R > Q > S

• Q > R > S > R

• S > R > Q > P

228.

Which one of the following acts as a nucleophile?

• (CH₃)₃N

• BF₃

• $\stackrel{+}{\mathrm{N}}$O₂

• ${\mathrm{CH}}_3 - \stackrel{+}{\mathrm{C}} = \mathrm{O}$

Which of the following compounds have highest melting point?

• Only I

• Only II

• I and II

• II and III

Identify the major product 'X' obtained in the following reaction.

2, 3-dimethyl butan-2-ol $\stackrel{\mathrm{conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }$ X