Haloalkanes and...

Which of the following show optical isomerism?

Here decreasing order of the rate of Bromination of the following compounds is: 
I. $${ Ph }\overset { \oplus  }{ NM } e_{ 3 }$$
II.$$Ph{ CH }_{ 2 }\overset { \oplus  }{ N } Me_{ 3 }$$
III $$PhMe$$
IV. $$PhNM{ e }_{ 2 }$$

Which of the following can undergo nucleophilic substitution reactions?

What is the minimum quantity (in grams) of methyl bromide required for preparing one mole of ethane by wurtz reaction?

In the following reaction,the product 'R' is : $${ CaC }_{ 2 }\overset { { H }_{ 2 }O }{ \longrightarrow  } P\overset { hot\quad iron }{ \underset { tube }{ \longrightarrow  }  } Q\overset { { CH }_{ 3 }Cl }{ \underset { { AlCl }_{ 3 } }{ \longrightarrow  }  } R$$

Which one of the following compound is most reactive towards $$SN^1$$ reaction

Which of the following alkyl halides would you expect to undergo $$S_N1$$ reaction most rapidly ?

What is the CORRECT order of reactivity of the following compounds in atomic nucleophilic substitution reaction when treated with aq. NaOH?

2-choloro-2-methylpentane on reaction with sodium methoxide in methanol yields

Which of the following is a correct order of reactivity of chlorides for given compounds ?