Chain Isomerism

Q. What is the minimum number of carbon atoms required for alkanes to exhibit chain isomerism?

1. 4
2. 1
3. 3
4. 2

Q.

The major product of the following chemical reaction is:

1. ${\left({\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{CO}\right)}_2\mathrm{O}$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3$

4. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}$

Q.

A number of chain isomer of $C_5{H}_{12}$ is,

1. 5
2. 2
3. 3
   
4. 6

Q. Minimum no. of carbon atoms required for an alkane to exhibit chain isomerism is:

1. 3
2. 4
3. 1
4. 2

Q.

How many benzene based isomers are possible by the compound ${\mathrm{C}}_7{\mathrm{H}}_8\mathrm{O}$?

Q.

9. How many different isomers are possible for a hydrocarbon with the molecular formula C₄H₁₀?

1. 1

2. 2

3. 3

4. 5

Q. 2-methyl pentane is a chain isomer of

1. 3-methyl pentane
2. Neopentane
3. 2, 2 -dimethyl butane
4. Isohexane

Q. All of the following are chain isomers of each other, except one. Which is the exception?

1. 
2. 
3. 
4. 

Q. How many structural isomers does monobromodichlorobenzene has?

1. 3
2. 4
3. 5
4. 6

Q. Which of the following isomers has the lowest dipole moment?

1. 1-Butene
2. Trans-2-butene
3. Cis-2-butene
4. None of the above

Q. Number of structural isomers possible for the molecular formula $C_4{H}_{11}N$ is/are:

Q. is heated with conc. $H_{2}S{O}_4$. The cycloalkene formed is

1. 
2. 
3. 
4. a

Q. The number of possible isomers of $C_6{H}_{14}$ is:

1. 4
2. 5
3. 6
4. 7

Q. How many stereochemically distinct alkene products are possible when the alkyl iodide given below undergoes E2 elimination?

1. 5
2. 6
3. 3
4. 4

Q. The structure of D-(+)-glucose is

The structure of L-$(-)$-glucose is

1. 
2. 
3. 
4. 

Q. Which of the following compounds are related as chain isomers ?

1. 
2. 
3. 
4. 

Q.

Name the characteristics of isomers?

Q.

Each of these questions contains an Assertion followed by a reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.

Assertion: Carbon has the ability to form long carbon chains.

Reason: Carbon has a unique property of ability to form long straight and branched chains called catenation.

1. If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

2. If both Assertion and Reason are correct and Reason is not the correct explanation of Assertion

3. If Assertion is correct but Reason is incorrect.

4. If Assertion is incorrect but Reason is correct.

Q. Choose the correct statements among the following.

1. The first step in the both $S_{N}1$ and $E1$ reaction is same
2. $S_{N}2$ reaction proceed with total retention of configuration
3. $E2$ eliminations are by the use of polar aprotic solvent and high concentration of a strong base
4. $S_{N}1$ reaction proceed with total inversion of configuration

Q. In which reactions, product formation takes place according to Hofmann's rule?

1. 
2. 
3. 
4. 

Q. How many different isomers are possible for a hydrocarbon with the molecular formula $C_4{H}_{10}$:

1. 1
2. 2
3. 3
4. 5

Q. How many structural isomers are possible for $C_2{H}_{4}B{r}_2$?

1. 1
2. 2
3. 3
4. 4

Q. How many structural isomers can be obtained by monochlorination of

Q. n-butane and isobutane are examples of :

1. Chain isomers
2. Geometrical isomers
3. Position isomers
4. Tautomers

Q. Which among the following is adsorbed to maximum extent on activated charcoal?

1. $C{H}_4$
2. $H_2$
3. $He$
4. $S{O}_2$

Q. What is the minimum number of carbon atoms required for alkanes to exhibit chain isomerism?

1. 4
2. 3
3. 2
4. 1

Q.

In the presence of $AlC{l}_3/HCl$ n-butane isomerizes to:

1. Cyclobutane

2. 2-Butene

3. Isobutane

4. 1-Butene

Q. Which of the following represent the stereochemically major product of the E1 elimination reaction?

1. More substituted cis alkene product
2. More substituted trans alkene product
3. Less substituted trans alkene product
4. Less substituted cis alkene product

Q. Choose the correct statement(s) regarding chain isomers :

1. They have same molecular weight.
2. They have same physical/chemical properties.
3. They have same vapor density.
4. They have same carbon skeleton (parent chain).

Q. Identify the IUPAC names of chain isomers of pentene:

1. 2, 2-dimethyl-2-propane
2. 2-methyl-2-propane
3. 3-methyl-1-butene
4. 2-methyl-2-butene