Geometrical isomerism is not shown by:

  •  

  •  

  •  CH2 = CClCH3

  •  CH3 - CH = CH - CH = CH2

The maximum number of stereoisomers possible for 3-hydroxy-2-methyl butanoic acid is:

  • 1               

  • 2

  • 3               

  • 4

The enol form of acetone after treatment with D2O gives:

  •             OD             |CH3—C=CH2

  •               O             ||CH3—C—CD3

  •            OH            |CH2=C—CH2D

  •            OD            |CD2=C—CD3

Maleic and fumaric acids are:

  • tautomers                 

  • geometrical isomers

  • chain isomers             

  • functional isomers

Isomers which can be interconverted through rotation around a single bond are:

  • Conformers             

  • Diastereomers

  • Enantiomers             

  • Positional isomers

How many structures of F are possible?

  • 2

  • 5

  • 6

  • 3

The optically active alkane with lowest molar mass is:

  •  CH3CH2C≡CH

  •  CH3CH2-CH|CH3-CH3

  •  

  •  CH3CH2.CH2CH3

a-D-(+)-glucose and β-D-(+)-glucose are :

  • enantiomers

  • conformers

  • epimers

  • anomers

The absolute configuration of 

 is:

 

 

  • S, R                 

  • S, S

  • R, R                 

  • R, S

The correct statement regarding electrophile is

  • Electrophile is a negatively charge species and can form a bond by accepting a pair of electrons from a nucleophile

  • Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile

  • Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile

  • Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile

With respect to the conformers of ethane, which of the following statements is true?

  • Bond angle remains same but bond length changes

  • Bond angle changes but bond length remains same

  • Both bond angle and bond length change

  • Both bond angles and bond length remain same

The IUPAC name of the compound

is-

 

 

  • 3-Keto-2-methylhex-4-enal

  • 5-Formylhex-2-en-3-one

  • 5-Methyl-4-oxohex-2-en-5-al

  • 3-Keto-2-methylhex-5-enal

The correct order of acidity among the following is-

  • CH2=CH2 > CH3-CH=CH2 > CH3C≡CH > CH≡CH

  • CH≡CH > CH3-C≡CH > CH2=CH2 > CH3 CH3

  • CH≡CH > CH2=CH2 > CH3-C≡CH > CH3-CH3

  • CH3-CH3 > CH2=CH2 > CH3-C≡CH > CH≡CH

The most suitable method of separation of 1:1 mixture of ortho and para-nitrophenols is

  • sublimation

  • chromatography

  • crystallisation

  • steam distillation

In pyrrole,

  • The electron density is maximum on

  • 1. 2 and 3         2. 3 and 4

  • 3. 2 and 4         4. 2 and 5

Which among the given molecules can exhibit tautomerisrn?
  • III Only
  • Both I and III
  • Both Iand II
  • Both II and III

The correct order of strengths of the carboxylic acids :-


(a) I>II>III
(b) II>III>I
(c) III>II>I
(d) lI>I>IlI
  • 1
  • 2
  • 3
  • 4

The correct statement regarding the comparison of staggered and eclipsed conformations of ethane is

  • The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain

  • The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has a torsional strain

  • The staggered conformation of ethane is more stable than eclipsed conformation because staggered conformation has no torsional strain

  • The staggered conformation of ethane is less stable than eclipsed conformation because staggered conformation has the torsional strain

In Duma’s method for estimation of nitrogen, 0.25g of an organic compound gave 40 mL

of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension

at 300 K is 25 mm, the percentage of nitrogen in the compound is

  • 17.36

  • 18.20..

  • 16.76

  • 15.76

The compound that gives the most stable carbonium ion after C- Cl bond ionisation among the following  is-

  •  

  •  

  •  

  •  

consider the following compounds

hyperconjugation occurs in 

  • I only

  • II only

  • III only

  • I and III

Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?
  • 1
  • 2
  • 3
  • 4

The enolic form of ethyl acetoacetate is given below. The number of sigma and pi bonds in the enolic form of ethyl acetoacetate are -

  • 18 sigma bonds and 2 pi-bonds

  • 16 sigma bonds and 1 pi-bond

  • 9 sigma bonds and 2 pi-bonds

  • 9 sigma bonds and 1 pi-bond

Given,

Which of the given compounds can exhibit tautomerism?

  • I and II            

  • I and III

  • II and III           

  • I, II and III

The incorrect statement among the following for a nucleophile is-

  • Nucleophile is a Lewis acid

  • Ammonia is a nucleophile

  • Nucleophiles attack low electron density sites

  • Nucleophiles are not electron seeking

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralised 10 mL of 1 M H2SO4. The percentage of nitrogen in the soil is

 

  • 37.33             

  • 45.33

  • 35.33             

  • 43.33

Which one is most reactive towards nucleophilic addition reaction?

 

  •        

  •            

Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-methylhex-3-en- 5-ynoic acid is ?

  •  

  •    

  •   

  •    

The structure of isobutyl group in an organic compound is
  • 1
  • 2
  • 3
  • 4

Some meta-directing substituents in aromatic substitution are given. Which one is most

deactivating?

 

  • -C≡N

  • -SO3 H

  • -COOH

  • -NO2

0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Chemistry Quiz Questions and Answers