Chains, Branches and Rings

Q. The maximum number of isomers of alkene $C_4{H}_8$ is 6

1. True
2. False

Q. Propanal and propanone are known as isomers. Give reason

Q. Write the structural formulae of isomers of butane.

Q. The correct molecular formula of cyclohexene and benzene respectively are:

1. $C_6{H}_{12}$ and $C_6{H}_{10}$
2. $C_6{H}_{10}$ and $C_6{H}_{12}$
3. $C_6{H}_{10}$ and $C_6{H}_6$
4. $C_6{H}_6$ and $C_6{H}_{10}$

Q. Condensed formula of pentene is

1. ${\mathrm{CH}}_2=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_2{\mathrm{CH}}_3$
2. ${\mathrm{CH}}_2={\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$
3. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_2{\mathrm{CH}}_3$
4. ${\mathrm{CH}}_2=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

Q. How many isomers of the following hydrocarbons are possible?
(a) C₃H₈
(b) C₄H₁₀

Q.

Name the three crystalline allotropes of carbon.

Q.

The different physical forms of the same element in the same physical state are called

Q.

What are saturated and unsaturated organic compounds?

Q. Ethene and ethyne are examples of .............. hydrocarbons.

1. unsaturated
2. saturated
3. supersaturated
4. ionic compound

Q.

Which of the following is the most polar compound?

1. ${\mathrm{NH}}_3$

2. ${\mathrm{BiH}}_3$

3. ${\mathrm{AsH}}_3$

4. ${\mathrm{SbH}}_3$

Q. Which amongst the following compounds has the same molecular formula as that of hexene?

1. Cyclopropane
2. Cyclobutane
3. Cyclohexane
4. Cyclooctane

Q. Draw structural formula for each of the compounds:
(a) isomer of n-butane
(b) vinegar
(c) 2-propanol
(d) ethanal

What is used to describe these five compounds taken together? [5 MARKS]

Q. How to find how many isomers would be formed by any hydrocarbon? Please tell the method.

Q. Complete the reaction:
Ethanoic acid + ethanol $\stackrel{\text{acid catalyst}}{\to }$ + water

1. ester
2. ether
3. ethane

Q.

Select the correct structural formula for 2-pentene.

1. 

2. 

3. 

4. 

Q.

The molecular formula of benzene is:

1. C₆H₆

2. C₆H₁₀

3. C₆H₁₂

4. C₆H₈

Q. Name of the hydrocarbon $C_4{H}_{10}$ would be:

1. n-Butane
2. Isobutane
3. Isopropane
4. Both (a) and (b)

Q. Identify the isomer of pentane among the following options.

1. 
2. 
3. 
4. 

Q.

The name of the following compound is :

1. Benzene

2. Hexene

3. Hexane

4. Cyclohexane

Q.

The same element existing in different physical forms is called ______________ (allotropy/monotropy).

Q.

how many structural isomers can be for C₅H₁₁Br

pl show with complete structure

Q.

The phenomenon of occurrence of same element in different physical forms is known as ___________.

1. catenation

2. tetravalency

3. allotropy

4. isotopes

Q. In the structure of graphite every carbon atom is bonded to ______ other carbon atoms.

1. three
2. four
3. two
4. five

Q. The maximum number of isomers possible for n-pentane is.

1. 3

Q.

Give the various application of organic chemistry.

Q. The maximum number of structural isomers possible for n-pentane is ______.

1. two
2. three
3. four
4. five

Q. Why is the conversion of ethanol to ethanoic acid an oxidation reaction?

[2 Marks]
[Ethanol and Ethanoic acid]

Q. How many chain isomers (non-cyclic aliphatic) could be obtained from the alkane $C_6{H}_{14}$ ?

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

Q.

Give any three uses of a diamond.