41.

Wat will be the final product of following reaction sequence?

• 

• 

• 

• 

Three of the following four reactions are due to one similar feature of carbonyl compounds, while the fourth one is different.Which one is fourth?

• Haloform reaction

• Aldol condensation

• Knoevenagel reaction

• witting reaction

The two forms of D-glucopyranose obtained from the solution of D-glucose are called

• enantomer

• epimer

• anomer

• isomer

Which type of polymeris the Buna-S-rubber?

• Addition polymer

• Condensation polymer

• Copolymer

• None of the above

The IUPAC name of the following compound is

HOCH₂-CH₂-CO-CH(CH₃)₂

• 2-methyl-5-hydroxy-3-pentane

• 4-methyl-3-oxo-1-pentanol

• 1-hydroxy-4-methyl-3-pentanone

• 3-keto-hexan-1-ol

Which one of the following will most readily be dehydrated in acidic medium?

• CH₃—CO—CH₂—CH(OH)—CH₃

• CH₃—CHOH—CH₂—CH₂—CH₃

• CH₃—COCHOH—CH₂—CH₃

• CH₃—CO—CH₂—CH₂—CHOH—CH₃

Which one of the following is a Grignard reagent?

• CH₃OMgI

• C₆H₅MgBr

• C₂H₅OMgBr

• (C₂H₅)₄Pb

In a Cannizzaro reaction, the intermediate that will be least hydride donor is

In the reaction, CHCl₃ + 4OH^- → HCOO^- + 3Cl^- + 2H₂O the intermediate species formed is/ are

• CCl₂

• CCl${}_3^{-}$

• Both (a) and (b)

• None of the above

When Lunar caustic reacts with acetylene gas, it yields

• Ag₂O

• AgCOOH

• Ag₂C₂

• Ag