A hydrocarbon contains 75% of carbon. Then its molecular formula is:

{C H}_{4}

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{C_{2} H}_{4}

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{C_{2} H}_{6}

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{C_{2} H}_{2}

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Solution

The correct option is A ${C H}_{4}$
If we consider the percentage of carbon and hydrogen in grams then
100 g of the compound has $75 g$ of C or $\frac{75}{12}$ moles of C = $0.0625$ moles

100 g of the compound has $25 g$ of H or $\frac{25}{1}$ moles of H = $0.25$
Molar ratio $C : H = 0625 : 25 = 1 : 4$
So its molecular formula is $C H_{4}$
Hence, option $A$ is correct.

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Similar questions

X, Y, Z

hydrocarbons molecular formula are

C H_{4}, C_{2} H_{4}, C_{2} H_{2}

. These three are passed through porcelain tube containing ammonical cuprous chloride. The out coming gases would be:

Q. A hydrocarbon contains

75

% of carbon. It's empirical formula is _________ .

Q. Which out of following hydrocarbons undergo addition reactions?

C_{2} H_{6}, C_{3} H_{8}, C_{3} H_{6}, C_{2} H_{2}

and

C H_{4}

Q. Which of the following hydrocarbons undergo addiction reactions?

C_{2} H_{6}

C_{3} H_{8}, C_{3} H_{6}, C_{2} H_{2}

and

C H_{4}

(a) What is a homologous series? Explain with an example.
(b) State two characteristics of a homologous series.
(c) The molecular formula of an organic compound is C₁₈H₃₆. Name its homologous series.
(d) Select the hydrocarbons which belong to the same homologous series. Give the name of each series.
CH₄, C₂H₂, C₂H₄, C₂H₆, C₄H₁₀, C₃H₄, C₃H₆
(e) What is meant by 'heteroatom'? Give examples. Write the names and formulae of two organic compounds containing different heteroatoms.

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