Question

Identify the substance that evaporates at room temperature.
A. Water
B. Oil
C. Kerosene
D. Ammonium chloride

Answer 1

Hint: Evaporation at room temperature means the molecules or the atoms escape from the liquid phase and turns out into vapour. Among the options the substance that evaporates will have low vapour pressure and it is volatile. Volatile liquids means which get into their vapour phase very easily and quickly.

Complete answer:
 Kerosene has very low vapour pressure and is volatile and evaporates at room temperature (liquid to gas) .
For the evaporation of water and oil need heat of evaporation (liquid to gas).
Water and oil both are non- polar but due to their size that is more than octane their London dispersion force is stronger than that of octane because the large electron clouds present on them make them more polarizable.
To maintain the integrity of kerosene which is a fuel it is stored in a clean and secure container and in a temperature controlled environment it is important to stored kerosene properly due to the evaporating power of kerosene which is very much higher because kerosene is volatile and the vapour pressure of kerosene is also low.
Volatile liquids are those liquids which get converted into vapour phase very easily and quickly the rate of vapour pressure of volatile liquid is very high and even at normal room temperature they get vapourized quickly.
Kerosene, a reliable fuel resource, is a highly flammable liquid. Kerosene a popular fuel has been used This popular fuel has been used for many purposes such as rocket fuel, in heating and lighting, in chemistry is it used for cooking and transportation as also for other household remedies. One popular remedy of kerosene is that it is used in cleaning motorcycle and bicycle chains before reapplication of proper lubrication. Molecular stability of kerosene is very good and many people find it extremely useful because it has the tendency to not react in cold temperature until it ranges in -40 degree fahrenheit and if it will come to this temperature also it only converts into slightly sludge like substances. It is used in wide range such as from cooking to rocket fuel because of its high stability in freezing point.

Thus the correct option will be (C).

Note:
Low vapour pressure volatile molecules evaporate at room temperature. The temperature at which kerosene evaporates is between 37⁰C and 65⁰C. Undiluted vinegar is used to neutralize the smell of kerosene. Petrol evaporates at a faster rate than kerosene because petrol is more lighter and volatile.