STRUCTURAL ISOMERISM

Which among the given molecules can exhibit tautomerism? (NEET-II 2016)

• III only

• Both I and III

• Both I and II

• Both II and III

Answer explanation

Which of the given compounds can exhibit tautomerism?(NEET 2015)

• II and III

• I, II and III

• I and II

• I and III

Answer explanation

The enolic form of ethyl acetoacetate as shown below has

• 9 sigma bonds and 2 pi-bonds

• 9 sigma bonds and 1 pi-bond

• 18 sigma bonds and 2 pi-bonds

• 16 sigma bonds and 1 pi-bond.

Answer explanation

Which one of the following pairs represents stereoisomerism? (NEET 2005)

• Structural isomerism and geometrical isomerism

• Optical isomerism and geometrical isomerism

• Chain isomerism and rotational isomerism

• Linkage isomerism and geometrical isomerism

Tautomerism is exhibited by

• R₃CNO₂

• RCH₂NO₂

• (CH₃)₃CNO

• (CH₃)₂NH

Answer explanation

SECONDARY AMINES UNDERGO TAUTO,MERISM

Isomers of a substance must have the same

• structural formula

• physical properties

• chemical properties

• molecular formula.

Which of the following compounds will show metamerism?

• CH₃ –O–C₂ H₅

• CH₃ –O–CH₃

• C₂ H₅ –CO– CH₃

• C₂ H₅ –S–C₂ H₅

The enolic form of acetone contains

• 9 sigma bonds, 1 pi bond and 2 lone pair of electrons

• 8 sigma bonds, 2 pi bonds and 2 lone pair of electrons

• 10 sigma bonds, 1 pi bond and 1 lone pair of electrons

• 9 sigma bonds, 2 pi bonds and 1 lone pair of electrons

Answer explanation

C₆H₅C ≡ N and C₆H₅N → C are which type of isomers?

• Tautomerism

• Position

• Functional

• Linkage

An isomer of ethanol is

• Methanol

• Diethyl ether

• Acetone

• Dimethyl ether