Which of the following pair shows functional isomerism?

C H_{3} C H_{2} O H

and

C H_{3} O C H_{3}

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C H_{3} - C H_{2} - C O O H

and

C H_{3} - C O O - C H_{3}

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C H_{3} - C O O H

and

C H_{3} - C O - C H_{3}

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C H_{3} - C H_{2} - N O_{2}

and

C H_{3} - C H_{2} - O N O

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Solution

The correct options are
A $C H_{3} C H_{2} O H$ and $C H_{3} O C H_{3}$
B $C H_{3} - C H_{2} - C O O H$ and $C H_{3} - C O O - C H_{3}$
D $C H_{3} - C H_{2} - N O_{2}$ and $C H_{3} - C H_{2} - O N O$
Functional isomers have same formula but different functional groups.
A) The molecular formula ; $C_{2} H_{6} O$ exists as Ethanol( $(C_{2} H_{5} O H)$ and methoxy methane ( $C H_{3} O C H_{3}$
B) The molecular formula ; $C_{3} H_{6} O_{2}$ exists as Propanoic acid ( $C H_{3} C O O H$ ) and methyl ethanoate ( $C H_{3} C O O C H_{3}$ ).
D) The molecular formula ; $C_{2} H_{5} N O_{2}$ exists as Nitro ethane( $C H_{3} C H_{2} N O_{2}$ ) and Ethyl nitrite ( $C H_{3} C H_{2} O N O$ )
In C , the molecular formula of both compounds is different.

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Similar questions

Q. Identify the type of the following reaction of carbon compounds.
a. CH₃ -CH₂ -CH₂-OH → CH₃ -CH₂ -COOH
b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O
c. CH₃ -CH = CH -CH₃ + Br₂ → CH₃ -CHBr - CHBr -CH₃
d. CH₃ -CH₃ + Cl₂→ CH₃ -CH₂ -Cl + HCl
e. CH₃-CH₂ -CH₂ -CH₂ -OH → CH₃ -CH₂ -CH=CH₂ + H₂O
f. CH₃-CH₂ -COOH + NaOH → CH₃ -CH₂ -COO - Na⁺ + H₂O
g. CH₃ -COOH + CH₃ -OH → CH₃ -COO- CH₃ + H₂O

Q. Examine the given structural formula and select the esters. You may also identify the chemical required for their preparation.
1.

C H_{3} - C H_{2} - C O O - C H_{3}

C H_{3} - C H_{2} - C O O H

C H_{3} - C H_{2} - C O - C H_{3}

C H_{3} - O H

C H_{3} - C H_{2} - C H_{2} O H

C H_{3} - C O O H

C H_{3} - C O O - C H_{2} - C H_{2} - C H_{3}

Name the functional groups present in the following compounds: [5 MARKS]

1. ${CH}_{3} - {CH}_{2} - {CH}_{2} - OH$
2. ${CH}_{3} - {CH}_{2} - {CH}_{2} - COOH$
3. ${CH}_{3} - {CH}_{2} - CHO$
4. ${CH}_{3} - CO - {CH}_{2} - {CH}_{3}$
5. ${CH}_{3} - {CH}_{2} - CO-OH$

Q. Name the functional groups present in the following compounds.
(i)

{C H}_{2} - C O - C H_{2} - {C H}_{2} - {C H}_{2} - {C H}_{3}

(ii)

{C H}_{3} - C H_{2} - {C H}_{2} - C O O H

(iii)

{C H}_{3} {- C H}_{2} - {C H}_{2} - {C H}_{2} - C H O

(iv)

{C H}_{3} - {C H}_{2} - O H

Q. Write IUPAC names of the following

@CH3-CH2-CH=CH2
@CH3-CH2-CH2-C(CH3)2-CH3
@CH3-CH2-CHO
@CH3-CH(OH)-CH3
@CH3-CH2-CH2-COOH

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