Processing math: 84%

Home / Aptitude Tests / Chemistry / A certain hydrocarbo...

A certain hydrocarbon on complete combustion at s.t.p produc...

A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm $^3$ of CO $_2$ and 54g of water. The hydrocarbon should be?

A.

C $_6$ H $_6$

B.

C $_4$ H $_{10}$

C.

C $_5$ H $_{10}$

D.

C $_4$ H $_6$

View answer & explanation

Correct answer is D

C $_x$ H $_y$ + (x + y/4)O $_2$ $\to$ x CO $_2$ + y/2 H $_2$ O

89.6 dm $^3$ $\to$ x moles CO $_2$

22.4 dm $^3$ $\to$ 1 mole CO $_2$

x = $\frac{89.6}{22.4}$

= 4 moles CO $_2$

54g of H $_2$ O $\to$ k moles H $_2$ O

18g H $_2$ O $\to$ 1 mole H $_2$ O

k = $\frac{54}{18}$

= 3 moles H $_2$ O

From the equation above,

x = 4

k = y/2 = 3

y/2 = 3 $\implies$ y = 6

$\therefore$ The hydrocarbon C $_x$ H $_y$ = C $_4$ H $_6$

See all Chemistry questions & answers

See more JAMB questions & answers

Similar Questions

Which of the following electron transition results in the emission of energy? ...

The metallic bond in magnesium is stronger than that in calcium because magnesium has a ...

The determination of heat of combustion is carried out with ...

If an element has the electronic configuration 1s 2 2s2 2p3 3s2 3p4, it is...

The uncovered raw food that is sold along major roads is likely to contain some amounts of ...

Species that occur in a reaction pathway but not in the overall reaction are known as ...

Changes in the physical in the scheme above.The letter X,Y and Z respectively represent...

The hybridization in the compound $CH_3 - CH_2 - C \equiv H$ is...

What is the chemical symbol for Promethium? ...

Which element is the most electronegative? ...

Aptitude Tests

Logical Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

Data Interpretation Questions and Answers

Personality Test

Spatial Reasoning Questions and Answers

Typing Speed and Accuracy Test

Quantitative Reasoning Questions and Answers

Situational Judgement Questions and Answers

Abstract Reasoning Questions and Answers

Verbal Reasoning Questions and Answers

Numerical Reasoning Questions and Answers

Puzzles Questions and Answers

Microsoft Office Questions and Answers

View latest jobs in Nigeria today