Question
Give reason:
Hydrocarbons are excellent fuels.

Answer

Hydrocarbons such as alkanes undergo combustion reactions with oxygen to produce carbon dioxide and water vapour. Alkanes are flammable which makes them excellent fuels.
Methane, for example, is the principal component of natural gas.
$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

From the equation for burning of hydrogen and oxygen $2 H _2+ O _2 \longrightarrow 2 H _2 O$ (Steam)
Write down the number of mole (or moles) of steam obtained from 0.5 moles of oxygen.
Classify the following substance under three headings:
(a) strong electrolytes (b) Weak electrolytes (c) Non-electrolytes.
Acetic acid, ammonium chloride, ammonium hydroxide, carbon tetrachloride, dilute hydrochloric acid, sodium acetate, dilute sulphuric acid.
Give the characteristic properties of electrovalent compounds.
Calculate the percentage composition of oxygen in lead nitrate $[Pb(NO>3)2]. [Pb = 207, N= 14, O = 16]$
Each of the two flasks contains $2.0 g$ of gas at the same temperature and pressure. One flask contains oxygen and the other hydrogen. Which sample contains the greater number of molecules?
For each of the salt: $A, B, C$ and $D,$ suggest a suitable method of its preparation.
  1. $A$ is a sodium salt.
  2. $B$ is an insoluble salt.
  3. $C$ is a soluble salt of copper.
  4. $D$ is a soluble salt of zinc.
Write balanced chemical equations for the following reactions.
(i) Formation of an acid salt from sulphuric acid by a sodium salt.
(ii) Formation of black spot on a piece of wood due to conc. sulphuric acid.
(iii) Formation of sulphur dioxide gas using a metal below hydrogen in activity series.
$4.5 \ moles$ of calcium carbonate are reacted with dilute hydrochloric acid. What is the volume of carbon dioxide liberated at $\text{STP}$?
What is an alloy? How do the properties of an alloy differ from its constituents?
Element $X$ is a metal with a valency $2$. Element $Y$ is a non metal with a valency $3.$
(a) Write equations to show how $X$ and $Y$ form ions.
(b) If $Y$ is a diatomic gas, write the equation for the direct combination of $X$ and $Y$ to form a compound.