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Byju's Answer

Standard IX

Biology

Monosaccharides

Assertion :No...

Question

Assertion :Nomenclature of $C H_{3} - C (C O O C_{2} H_{5}) = C H - C O O H$ is 3-carbethoxy-2-butenoic acid. Reason: Principal function group gets lowest number followed by double bond or triple bond.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

$4 C H_{3} - 3 C | C O O C_{2} H_{5} = 2 C H - 1 C O O H$

Here since $- C O O H$ is the principal functional group it gets lowest number than the secondary functional group (3-carbethoxy). So it is 3-carbethoxy-2-butenoic acid

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Similar questions

Assertion (A) IUPAC name of the compund
$C H_{3} - C H | C H_{3} - O - C H_{2} - C H_{2} - C H_{3}$ is 2-ethoxy-2-methylethane
Reason (R) In IUPAC nomenclature, ether is regarded as hydrocarbon derivative in which a hydrogen atom is replaced by - OR or - 0AR group [where, R = alkyl group and Ar = aryl group].
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

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Assertion :Nomenclature of CH3−C(COOC2H5)=CH−COOH is 3-carbethoxy-2-butenoic acid. Reason: Principal function group gets lowest number followed by double bond or triple bond.

Assertion :Nomenclature of $C H_{3} - C (C O O C_{2} H_{5}) = C H - C O O H$ is 3-carbethoxy-2-butenoic acid. Reason: Principal function group gets lowest number followed by double bond or triple bond.