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

IUPAC name of 

CH₃CH₂C(Br)=CH-Cl is :

• 2 - bromo - l - chloro butene - 1

• 1 - chloro - 2 - bromo - butene

• 3 - chloro - 2 - bromo butene - 2

• none of these

Which of the following sequence of reactions (reagents) can be used for the conversion of C₆H₅CH₂CH₃ into C₆H₅CH=CH₂?

• SOCl₂ ; H₂O

• SO₂Cl₂; alc. KOH

• Cl/h$\mathrm{\nu }$; H₂O

• SOCl₂ ; alc. KOH.

Which ofthe following compounds has the highest boiling point?

• CH₃CH₂CH₂Cl

• CH₃CH₂CH₂CH₂Cl

• CH₃CH(CH₃)CH₂Cl

• (CH₃)₃CCl

The correct increasing order of the reactivity of halides for S_N 1 reaction is

• CH₃- CH₂- X<(CH₃)₂CH= X <CH₂= CH-CH₂- X< PhCH₂- X

• (CH₃)₂CH-X <CH₃-CH₂- X < CH₂= CH - CH₂-X < PhCH₂-X

• PhCH₂- X<(CH₃)₂CH=X<CH₃-CH₂-X<CH₂= CH- CH₂- X

• CH₂= CH - CH₂- X < Ph- CH₂- X <(CH₃)₂CH-X <CH₃-CH₂- X

The major product formed in the following reaction is

• (CH₃)₂CH-CH₂OCH₃

• CH₃-CH(OCH₃)-CH₂CH₃

• CH₃-C(CH₃)=CH₂

• (CH₃)₂-C-OCH₃- CH₃

129.

The major product obtained on treatment of CH₃CH₂CH(F)CH₃ with CH₃O/CH₃OH is

• CH₃CH₂CH(OCH₃)CH₃

• CH₃CH = CHCH₃

• CH₃CH₂CH = CH₂

• CH₃CH₂CH₂CH₂OCH₃

CH₃CO₂C₂H₅ on reaction with sodium ethoxide in ethanol gives A, which on heating in the presence of acid gives B. Compound B is

• CH₃COCH₂COOH

• CH₃COCH₃

• 

• CH₂=C(OC₂H₅)₂