Chemistry 2007 JAMB Past Questions - Question 34: A mixture of petrol and water can be separated through

Correct Answer

C

Explanation

There are two main methods for separating a mixture of petrol and water:

1. **Decantation:** This method is based on the fact that petrol and water are immiscible liquids, meaning they don't mix with each other. As a result, when you allow the mixture to sit undisturbed, the petrol will float to the top and the water will sink to the bottom. You can then carefully pour off the petrol layer, leaving the water behind.
[Image of decantation petrol and water]

2. **Separating funnel:** This method is more efficient than decantation, especially for smaller volumes of mixture. A separating funnel is a pear-shaped glass container with a stopcock at the bottom and a stopper at the top. You pour the mixture into the funnel, and the two layers will separate. You can then open the stopcock and drain off the lower layer (water) first, followed by the upper layer (petrol).
[Image of separating funnel petrol and water]

Here are some additional points to keep in mind:

* It is important to dispose of petrol safely and responsibly. Do not pour it down the drain or on the ground.
* If you are not comfortable separating the mixture yourself, you can take it to a hazardous waste disposal facility.