Exploring Haloalkanes and Haloarenes

Assertion: Haloalkanes undergo nucleophilic substitution reactions. Reason: The carbon atom in haloalkanes is electrophilic due to the presence of a halogen.

• Both the assertion and reason are correct.

• Haloalkanes do not undergo nucleophilic substitution reactions.

• Both the assertion and reason are incorrect.

• The carbon atom in haloalkanes is nucleophilic due to the presence of a halogen.

Assertion: Haloarenes are less reactive than haloalkanes. Reason: The resonance stabilization in haloarenes decreases their reactivity.

• Haloarenes and haloalkanes have the same reactivity.

• Haloarenes are more reactive than haloalkanes.

• True

• The resonance stabilization in haloalkanes increases their reactivity.

Assertion: The reaction of haloalkanes with sodium hydroxide leads to the formation of alcohols. Reason: This reaction is an example of nucleophilic substitution.

• The assertion is false, but the reason is true.

• Both assertion and reason are true, and the reason correctly explains the assertion.

• Both assertion and reason are false, and the reason does not explain the assertion.

• The assertion is true, but the reason is false.

Assertion: Haloarenes can undergo electrophilic substitution reactions. Reason: The presence of halogen atoms activates the aromatic ring towards electrophiles.

• Haloarenes cannot undergo electrophilic substitution reactions.

• True

• The presence of halogen atoms deactivates the aromatic ring towards electrophiles.

• False

Assertion: The boiling points of haloalkanes increase with increasing molecular weight. Reason: This is due to increased van der Waals forces in larger molecules.

• The assertion is false, but the reason is true.

• The assertion is true, but the reason is false.

• Both the assertion and reason are true, and the reason correctly explains the assertion.

• Both the assertion and reason are false.

Assertion: Haloalkanes can be prepared by the reaction of alcohols with hydrogen halides. Reason: This reaction is known as halogenation.

• Assertion is false, Reason is true.

• Both Assertion and Reason are true.

• Both Assertion and Reason are false.

• Assertion is true, Reason is false.

Assertion: The presence of halogens in haloarenes makes them more polar than benzene. Reason: Halogens are electronegative and withdraw electron density from the aromatic ring.

• True

• Halogens increase the electron density of the aromatic ring.

• Benzene is more polar than haloarenes due to its structure.

• Halogens do not affect the polarity of benzene.

Assertion: The Friedel-Crafts alkylation is a method to prepare haloarenes. Reason: This reaction involves the introduction of an alkyl group into the aromatic ring.

• True, True

• False, True

• False, False

• True, False

Assertion: Haloalkanes can be converted to alkenes through elimination reactions. Reason: This process involves the removal of a halogen and a hydrogen atom.

• Elimination reactions do not involve any atoms being removed.

• This process adds a halogen and a hydrogen atom.

• Haloalkanes cannot be converted to alkenes.

• True

Assertion: The reactivity of haloalkanes is influenced by the type of halogen present. Reason: Iodine is a better leaving group than chlorine due to its larger size and weaker bond.

• Both the assertion and reason are true, but the reason does not explain the assertion.

• Both the assertion and reason are true, and the reason correctly explains the assertion.

• The assertion is false, and the reason is true.

• Chlorine is a better leaving group than iodine due to its smaller size.