QQuestion
Ethane burns in oxygen according to the chemical equation:
2C2H6 + 7O2 → 4CO2 + 6H2O
If 80 ml of ethane is burnt in 300 ml of oxygen, find the composition of the resultant gaseous mixture when measured at room temperature. [3]
✓Answer
The resultant gaseous mixture contains 160 ml of carbon dioxide and 20 ml of unused oxygen.
By Gay-Lussac’s law, the reacting gas volumes are in the ratio:
Ethane : oxygen : carbon dioxide = 2 : 7 : 4.
Oxygen consumed:
\frac{7}{2}\times80=280\text{ ml}Oxygen remaining = 300 − 280 = 20 ml.
Carbon dioxide formed:
\frac{4}{2}\times80=160\text{ ml}All 80 ml of ethane is consumed. At room temperature, the water formed is taken as condensed liquid and is not included in the gaseous mixture.
Total gas volume = 160 + 20 = 180 ml.
Related Questions
More ICSE Moderate level questions
State the terms/process for the following: [5]The energy released when an atom in the gaseous state accepts an electron to form an anion.Tendency of an element to form chains of identical atoms.The name of the process by which Ammonia is manufactured on a large scale.A type of salt formed by partial replacement of hydroxyl radicals with an acid radical.The ratio of the mass of a certain volume of gas to the same volume of hydrogen measured under the same conditions of temperature and pressure.
The vapour density of CH₃OH is ............... (At. Wt. C=12, H=1, O=16) [1] 32 18 16 34
Complete and balance the following equations: [3] (a) NH4Cl + Ca(OH)2 → (b) CuSO4 + NH4OH → (c) Cu + Conc. HNO3 →
The following questions are pertaining to the laboratory preparation of Ammonia gas from Magnesium nitride: [3](a) Write a balanced chemical equation for its preparation.(b) Why is this method seldom used?(c) How do you identify the gas formed?
Arrange the following as per the instruction given in the brackets: [3](a) Al, K, Mg, Ca (decreasing order of its reactivity)(b) N, Be, O, C (increasing order of non-metallic character)(c) P, Si, F, Be (decreasing order of valence electrons)
State a relevant reason for the following: [2](a) Hydrogen chloride gas cannot be dried over quick lime.(b) Ammonia gas is not collected over water.
Metals are good ............... [oxidizing agents / reducing agents] [1]
The ion which could be discharged most readily during electrolysis is ............... [Fe2+ / Cu2+] [1]
Fill in the blank with the correct choice:Higher the pH value of a solution, the more ............... [acidic / alkaline] it is. [1]
The following sketch illustrates the process of conversion of Alumina to Aluminium: [5]Study the diagram and answer the following:Name the constituent of the electrolyte mixture which has a divalent metal in it.Name the powdered substance ‘X’ sprinkled on the surface of the electrolyte mixture.What is the name of the process?Write the reactions taking place at the electrodes ‘Y’ (anode) and ‘Z’ (cathode) respectively.
Fill in the blank by choosing the correct answer: During electrolysis, the compound ............... in its molten state liberates reddish brown fumes at the anode. [NaCl / PbBr2] [1]
Non-polar covalent compounds are ............... [good / bad] conductors of heat and electricity. [1]