Order of boiling point is :

• HF > HI > HBr > HCl

• HF > HBr > HI > HCl

• HCl > HBr > HI > HF

• HCl > HI > HBr > HF

On mercuration and demercuration, the following compound gives

• 

• 

• 

• None of these

The product obtained is/are

• o-product

• m-product

• o- and p-products

• o-, m- and p-products

Which of the following is optically inactive?

• 

• 

• 

• None of these

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.

298.

SN² mechanism is involed in the following substitution :

• CH₃-CH₂-Cl + OH^-

• (CH₃)₂-C(Cl)-CH₃-OH^-

• (CH₃)₂-C-Cl + OH^-

• CH₃-CH₂-(CH₃)C(Cl)-CH₃ + OH^-

Arrange the hydra - acids of halogens in increasing order of acidity .

• HF < HCl < HBr < HI

• HI < HBr < HCl < HF

• HF < HBr < HI <HCl

• HF < HI < HBr < HCl

Chloroform , when kept open , is oxidised to :

• CO₂

• COCl₂

• CO₂ , Cl₂

• none of these