How many cyclic isomers are possible for molecular formula ${\mathrm{C}}_4{\mathrm{H}}_6$ ?

1. 3

2. 4

3. 5

4. 6

The IUPAC name of  is 

1. 2- Methyl bicyclo [2,2,1] heptane

2. 1- Methyl bicyclo [1,2,2] heptane

3. 1 - Methyl bicyclo [2,2,1] heptane

4. 2 - Methyl bicyclo [1,2,2] heptane

The IUPAC name of  is 

1. Spiro [2,2] pentane

2. Bicyclo [2,2] pentane

3. Bicyclo [2,1,0] pentane

4. Spiro [2,1,0] pentane 

The IUPAC name of   is 

1. Bicyclo [0,1,2] pentane

2. Bicyclo [2,1,0] pentane

3. Bicyclo [1,0,1] pentane

4. Bicyclo [1,0,2] pentane

Maleic and fumaric acids are-

1. Tautomers                 

2. Geometrical isomers

3. Chain isomers             

4. Functional isomers

The configuration of given tartaric acid is

1. 2R, 3R         2. 2R, 3S

3. 2S, 3S         4. 2S, 3R

How many geometrical isomers are possible of the following?

 CH₃-CH=CH-CH=CH-CH₃

1. 2             2. 3

3. 4             4. 6

The IUPAC name of the compound

1. 3,3-diethyl-4-methyl-5 (methylethyl)octane

2. 3,3-diethyl-5-isopropyl-4-methyloctane

3. 4-isopropyl-5-methyl-6,6-diethyloctane

4. 6,6-diethyl-4-isopropyl-5-methyloctane

The most stable carbocation among the following is

1. ${\left(C{H}_3\right)}_{3}CC{H}^{+}C{H}_3$

2. $C{H}_{3}C{H}_{2}C{H}^{+}C{H}_{2}C{H}_3$

3. (CH₃)₂CH⁺CH₂CH₂CH₃

4. $C{H}_{3}C{H}_{2}C{H}^{+}$

The IUPAC name of is :

1. 3, 4-dimethylpentanoyl chloride

2. 1-chloro-1-oxo-2, 2-dimethylpentane

3. 2-ethyl-3-methylbutanoyl chloride

4. 2, 3-dimethylpentanoyl chloride