Question

Which of the following petroleum products is used for dry cleaning?
A.Grease
B.Kerosene
C.Diesel
D.Petrol

Answer 1

Hint: All the petroleum products that we see today like kerosene, paraffin, diesel, petrol, etc. are all obtained from one source raw material known as crude oil. Crude oil is made up of hydrocarbons, which are mainly hydrogen (about \[13\% \] by weight) and carbon (about \[85\% \] ). Other elements such as nitrogen (about \[0.5\% \] ), sulphur \[(0.5\% )\] , oxygen \[\left( {1\% } \right)\] , and metals such as iron, nickel, and copper (less than \[0.1\% \] ) can also be mixed with small amounts of hydrocarbons.

Complete Step-by-Step Answer:
Before we move forward with the solution of the given question, let us first understand some important basic concepts.
The way molecules are organized in hydrocarbons is the result of the original formation of algae, plants or plankton millions of years ago. The variation found in hydrocarbons and crude oil exposed plants to heat and pressure. Due to these variations, the ground from which crude oil is extracted may contain hundreds of different petroleum compounds. Light oils may contain \[97\% \] hydrocarbons, whereas heavy oils and bitumen may contain only \[0\% \] hydrocarbons and a large number of other elements. It is almost always necessary to refine crude oil to make a useful product.
In dry cleaning, a petroleum solvent is used instead of water. It is "dry" only in the sense that it is not wet with water. In the early days of dry cleaning, this solvent used to be petrol.

Hence, Option C is the correct option

Note: Today, the industry almost universally uses a solvent called perchloroethylene. Perchloroethylene is a solvent commonly used in dry cleaning operations. When applied to materials or fabrics, it helps dissolve grease, oil, and wax without damaging the fabric.