Assertion :12 parts by mass of carbon in $C O$ and $C O_{2}$ molecules combine with 16 and 32 parts by mass of oxygen. Reason: A given compound always contains exactly the same proportion of elements by weight.

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 B Both assertion and reason are correct but reason is not the correct explanation for assertion
Here two elements ( $C$ and $O$ ) combine to form more than one compound ( $C O$ and $C O_{2}$ ) and the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers.
12 parts by mass of carbon in $C O$ and $C O_{2}$ molecules combine with 16 and 32 parts i.e. (1:2) ratio by mass of oxygen
Thus they follow the law of multiple proportions.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Hence, option $B$ is correct.

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Similar questions

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

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: 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.

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Assertion :12 parts by mass of carbon in CO and CO2 molecules combine with 16 and 32 parts by mass of oxygen. Reason: A given compound always contains exactly the same proportion of elements by weight.

Assertion :12 parts by mass of carbon in $C O$ and $C O_{2}$ molecules combine with 16 and 32 parts by mass of oxygen. Reason: A given compound always contains exactly the same proportion of elements by weight.