Chemistry

Organic Chemistry Fundamentals

287 Questions

Organic chemistry fundamentals cover the structure, properties, and reactions of carbon containing compounds. The questions explore functional groups, isomerism, homologous series, and basic reaction mechanisms. This forms the basis of general chemistry across multiple examination formats.

Functional groupsIsomerism typesHomologous seriesCycloalkanesOrganic monomers

Organic Chemistry Fundamentals Questions

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

The isomerism in ether is called as ________.

  1. regio isomerism

  2. metamerism

  3. functional isomerism

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ethers show metamerism. When the two compounds have same ratios of atoms but different arrangements, then they are said to show metamerism. e.g. Methyl propyl ether and diethyl ether have same ratios of carbon, hydrogen and oxygen atoms but different structural arrangements. Hence they are metamers of each other.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Ethers having same molecular formula but different alkyl groups on either side of the oxygen atoms show:

  1. optical activity

  2. functional isomerism

  3. chain isomerism

  4. metamerism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ethers having same molecular formula but different alkyl groups on either side of the oxygen atoms show metamerism. Ethoxy ethane and methoxypropane, phenetole and benzyl methyl ether show metamerism.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Which of the following are metamerism?

  1. Ethoxy ethane and methoxypropane

  2. Phenetole and benzyl methyl ether

  3. Both a and b

  4. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Ethers having same molecular formula but different alkyl groups on either side of the oxygen atoms show metamerism. Ethoxy ethane and methoxypropane, phenetole and benzyl methyl ether show metamerism.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Ethers exbhit which of the following isomerism(s)?

  1. Chain isomerism

  2. Functional isomerism

  3. Metamerism

  4. A, B &C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ethers exhibit chain isomerism ,functional isomerism, Metamerism and Chain isomerism.Ethers with the same formula and having different carbon chain skeletons are called chain isomers.

Functional isomers : Ethers are isomeric with alcohols.
Metamerism Isomers with the same molecular formula but different alkyl groups (around the functional group) are called metamers. An ether with formula $C _4H _{10}O$ has 3 metamers.

Hence option D is correct.






Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Which of the following isomerisms is shown by the given two compounds?

$CH _3CH _2CH _2CH _2OCH _3$      and     $CH _3-\overset{CH _3}{\overset{|}{C}H}-CH _2OCH _3$
      1-Methoxybutane                         1-Methoxy - 2 - Methylpropane

  1. Chain isomerism

  2. Positional isomerism

  3. Functional isomerism

  4. Metamerism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The given two ethers have different carbon atoms on the two sides of a bifunctional group (-O-). Hence these are the metamers of each other.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

$\underset{Diehtyl \,ether}{C _2\,H _5\,O \,C _2 \,H _5}$       $\underset{Methyl \,n -propyl \,ether}{CH _3 \,O \,CH _2 \,CH _2 \,CH _3}$       $\underset{Methyl \,iso \,propyl \,ether}{CH _3 - O - \underset{!!!!!CH _3}{\underset{!!!!!|}{CH} -} CH _3}$
The given compounds exhibit which of the following isomerism?

  1. Chain isomerism

  2. positional isomerism

  3. Metamerism

  4. Functional isomerism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$\underset{Diehtyl \,ether}{C _2\,H _5\,O \,C _2 \,H _5}$       $\underset{Methyl \,n -propyl \,ether}{CH _3 \,O \,CH _2 \,CH _2 \,CH _3}$       $\underset{Methyl \,iso \,propyl \,ether}{CH _3 - O - \underset{!!!!!CH _3}{\underset{!!!!!|}{CH} -} CH _3}$

The given compounds exbhit which of the following isomerism Metamerism Isomers with the same molecular formula but different alkyl groups(position of fuctional group is changing so positional isomers) (around the functional group) are called metamers. the given  ether is having the  formula $C _4H _{10}O$ has 3 metamers.

Hence option C is correct.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Which type of isomerism is exhibited by ${ C } _{ 2 }{ H } _{ 5 }O{ C } _{ 2 }{ H } _{ 5 }$ and $CH _3-O-\underset{CH _3}{\underset{|}{C}H}-CH _3$ ?

  1. Functional

  2. Metamerism

  3. Position

  4. Chain
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The isomerism exhibited by ${ C } _{ 2 }{ H } _{ 5 }O{ C } _{ 2 }{ H } _{ 5 }$ and $CH _3-O-\underset{CH _3}{\underset{|}{C}H}-CH _3$ is metamerism. They have same molecular formula but different alkyl groups on  either side of functional group.

Multiple choice chemistry the p-block elements - group 13 study of orthoboric acid some important compounds of boron study of boron

$H _{3}BO _{3}\xrightarrow{375K} A \xrightarrow{Red \, Heat}B _{2}O _{3}$
$H _{3}BO _{3}\xrightarrow{435K} B \xrightarrow{Red \, Heat}B _{2}O _{3}$


The compounds A & B are:

  1. Orthoboric acid, metaboric acid

  2. Metaboric acid, Tetra boric acid

  3. Tetra boric acid, Metaboric acid

  4. Tetra boric acid, orthoboric acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$H _{3} BO _{3} \overset{375K}{\rightarrow} HBO _{2} \overset{red heat}{\rightarrow} B _{2} O _{3} $
$H _{3} BO _{3} \overset{435K}{\rightarrow} H _{2} B _{4} O _{7} \overset{red heat}{\rightarrow} B _{2} O _{3} $