Tautomerism will be exhibited by                 

1. (CH₃)₃CNO               

2. (CH₃)₂NH

3. R₃CNO₂                   

4. RCH₂NO₂

The total number of structural isomers is possible for C₅H₁₁Cl is-

1. 6 

2. 8

3. 10 

4. 12

 Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

1. but-2-ene                             

2. Butanol

3. but-2-yne                             

4. buten-2-ol   

The number of possible isomers of the aromatic compound with molecular formula C₇H₈O are :
1. 3
2. 5
3. 7
4. 9

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

1. CH₃-CH=CH-CH₃

2. CH₃-CH₂-CH=CH-CH₂-CH₃

3. ${\mathrm{CH}}_3-\underset{|}{\mathrm{C}}=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$
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4.${\mathrm{CH}}_3-\underset{|}{\mathrm{C}}\mathrm{H}-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$
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An alkane can form Structural isomers if the number of carbon atoms is-

1. $\ge$1                                 

2. $\ge$2

3. $\ge$3                                   

4. $\ge$4

Isomerism exhibited by acetic acid and methyl formate is:
1. Functional
2. Chain
3. Geometrical
4. Central 

Which one of the following pairs represents stereoisomerism?                                     

1. Chain isomerism and rotational isomerism

2. Structural isomerism and geometrical isomerism

3. Linkage isomerism and geometrical isomerism

4. Optical isomerism and geometrical isomerism

$\mathrm{\alpha }$-D-glucose and $\mathrm{\beta }$-D glucose have a specific rotation of +112$°$ and +19$°$ respectively. In aqueous solution the rotation becomes +52$°$. This process is called:

1. inversion                 

2. racemisation

3. mutarotation             

4. embolism

A racemic mixture is formed by mixing two:

1. Isomeric compounds             

2. Chiral compounds

3. Meso compounds                       

4. Enantiomers