List of top Chemistry Questions on Haloalkanes And Haloarenes asked in CBSE CLASS XII

Consider the following reaction and identify A and B: \[ CH_3Cl + NaI \xrightarrow{\text{dry acetone}} A + B \]
Out of ‘X’ and ‘Y’ , which one will form product with inversion of configuration and why?
Out of ‘X’ and ‘Y’, which one will undergo racemisation and why?
Compound ‘X’ with molecular formula \( C_4H_9Br \) reacts with aqueous KOH to give an alcohol. The rate of this reaction depends only on the concentration of compound ‘X’. When an optically active isomer ‘Y’ of the compound ‘X’ was treated with aqueous KOH solution, the rate of reaction was found to be dependent on concentration of compound ‘Y’ and aqueous KOH both.

22(a). Write down the structural formula of both ‘X’ and ‘Y’.
Why are haloarenes less reactive towards nucleophilic substitution reaction? Give two reasons.
Which of the following is 'not' true about enantiomers?
p-Nitrotoluene with \(Br_2\) (heat)
Write the major product in the following reactions: (1) Chlorobenzene + Na/dry ether
Although chlorine shows strong −I effect, it is ortho–para directing in electrophilic aromatic substitution. Why?
Predict the alkene formed by dehydrohalogenation of 1-bromo-1-cyclohexylethane.
Which isomer of C\(_4\)H\(_9\)Br is most reactive towards \(S_N2\) reaction?
Racemic mixture

Define the following terms: 
Ambident nucleophiles

Why is chloroform stored in dark coloured bottles?
What type of halide is present in the compound: \[ CH_3-CH(CH_3)-C(Cl)=CH_2 \]
Which of the following is more reactive towards \(S_N1\) reaction: 2-bromo-2-methylbutane or 1-bromopentane?
Why is Ce\(^{4+}\) in aqueous solution a good oxidising agent?
Complete the following equation:
Why are haloarenes less reactive towards nucleophilic substitution reactions? How does the presence of nitro (–NO₂) group at ortho- and para-positions in haloarenes increase the reactivity towards nucleophilic substitution reactions?
Draw the structure of the major monohalo product for each of the following reactions:
major monohalo product
Alkyl halides undergoing nucleophilic bimolecular substitution reaction involve:
Assertion (A): The boiling points of alkyl halides decrease in the order: RI > RBr > RCl > RF.
Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass.
The synthesis of alkyl fluoride is best carried out by:
Which of the following haloalkanes react with aqueous KOH most rapidly by $S_N1$ reaction?
Polyhalogen compounds have wide application in industries and agriculture. DDT is also a very important polyhalogen compound. It is a: