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

Compounds with ${\mathrm{C}}_4{\mathrm{H}}_{11}\mathrm{N}$ as molecular formula can exhibit-
1. Position isomerism
2. Metamerism
3. Functional isomerism
4. All of the above

 Functional isomer is not possible for -

 Alkyl cyanide \(R-C \equiv N\) and alkyl isocyanides \(R- \overset{+}{N} \equiv C^-\) are: 

An isomer of ethanol is-

The type of structural isomerism shown by given compounds is-

${\mathrm{CH}}_3-\mathrm{S}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$ and 

The pair of structures that does not represent isomers is:

1.		2.
3.		4.

The number of isomeric structures for C₂H₇N would be:
1. 4
2. 3
3. 2 
4. 1

Which of the following organic compounds exhibit tautomerism?

I.		II.
III.		IV.

1. I and II

2. I, III and IV

3. I, II and IV

4. I, II, III and IV

The pair that represents chain isomers is-