Draw the structure of 3-methylbutanal ?

Answer the following: 

(i) Haloalkanes easily dissolve in organic solvents, why? 

(ii) What is known as a racemic mixture? Give an example. 

(iii) Of the two Bromo derivatives, C₆H₅CH(CH₃)Br and C₆H₅CH(C₆H₅)Br, which one is more reactive in S_n1 substitution reaction and why? 

Give the IUPAC name of the following compound.

Although chlorine is an electron withdrawing group, yet it is ortho-, Para-directing in electrophilic aromatic substitution reactions. Explain why it is so?

What happens when CH₃-Br is treated with KCN? 

Write the IUPAC name of the following compound: (CH₃)₃ CCH₂Br

Chlorobenzene is extremely less reactive towards a nucleophilic substitution reaction. Give two reasons for the same?

Which would undergo S_N1 reaction faster in the following pair?