51.

Chain transfer reagent is

• CCl₄

• CH₄

• O₂

• H₂

A catalyst

• changes the equilibrium constant

• lowers the activation energy

• increases the forward and backward reactions at different speeds

• follows same mechanism for the reaction

Which of the following statement is true?

• Trimethyl amines form a soluble compound with Hinsberg reagent and KOH.

• Dimethylamines react with KOH and phenol to form an azo dye.

• Methylamine reacts with nitrous acid and liberates N₂ from aq. soln.

• None of these

Which of the following is optically inactive?

• 

• 

• 

• None of these

Assertion : Benzene diazonium salt on boiling with water forms phenol.

Reason : C- N bond is polar.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Acetamide has more polar -CO group than in ethyl acetoacetate.

Reason : $\stackrel{..}{\mathrm{N}}$H₂ is more electron donating than $\stackrel{..}{\mathrm{O}}$C₂H₅.­

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Chloral reacts with phenyl chloride to form DDT.

Reason : It is an electrophilic substitution reaction.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Mixture of CH₃COOH and CH₃COONH₄ is an example of acidic buffer.

Reason : Acidic buffer contains equimolar mixture of weak acid and its salt with weak base.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with NaI in acetone.

Reason : NaCl/NaBr are soluble in acetone while NaI is not.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Assertion : Alpha ($\mathrm{\alpha }$)-amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity.

Reason: H⁺ ion given by carboxylic group (-COOH) is captured by amino group (-NH₂) having lone pair of electrons.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.