Class XI Chemistry Basics of Organic 9

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Question 1

Which of the following will not show cis-trans isomerism ?

• AButanedioic acid
• B1,2-dimethyl cyclopropane
• C1,2-dichloroethene
• DBut-2-enedioic acid

Question 2

The optically active tartaric acid is named as D- (+)-tartaric acid because it has a positive

• Aoptical rotation and is derived from D glucose
• BpH in organic solvent
• Coptical rotation and is derived from D-(+) glyceraldehyde
• Doptical rotation only when substituted by deuterium

Question 3

If optical rotation produced by compound 1 is 36° then the rotation produced by compound 2 is

• A-36°
• B0°
• C+18°
• D+72°

Question 4

Among these ketones which of the following is correct order of the case of their enolizations?

• A1>2>3
• B3>2>1
• C2>1>3
• D3>1=2

Question 5

Consider the following statements
1) racemic forms are not optically active but are resolvable
2) the presence of chiral atom is sufficient but not the necessary condition for enantiomer
3) meso compounds are inactive and are not resolvable
4) conformational enantiomers can be resolved
Now select the correct statements.

• A1,2 and 3
• B2,3 and 4
• C1,2 and 4
• Dall

Question 6

Which of the following is an aromatic ring structure?

• A
• B
• C
• D

Question 7

The IUPAC name of Cl₃CCH₂CHO is

• AChloral
• BTrichloropropanal
• C1,1,1-trichloropropanal
• D3,3,3- trichloropropanal

Question 8

How many resonance structures are possible for

• A1
• B2
• C3
• D4

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