MixturesA mixture is formed by mixing different elements or compounds. The proportionof various components in a mixture is not fixed. No chemical change takes place duringthe formation of mixtures and no new substance is formed.1. What are the mixtures used in everyday life ?2. Are all mixtures useful to us ?3. How will you separate each component from a mixture of semolina, salt and ironfilings ?You might remember that mixing unwanted substances in any foodstuff is calledadulteration. In other words, an adulterated foodstuff is also a kind of mixture.When an unwanted and harmful substance is mixed with another substance theresulting mixture no longer remains useful. In such cases, we separate the unwantedingredients from the mixture. For this purpose, simple and easy methods such as straining(filtering), sifting, picking, sorting, winnowing, combing with a magnet and sublimationare used. Which ingredients, from which mixtures could be separated by using thesemethods ? We have learnt about the properties of matter and the effects of heat. Theseproperties are also used for separating the components of a mixture.1. Prepare a sherbet. 2. Prepare a bhel.Did the taste of the original ingredients change due to the aboveprocesses ?Try this.Can you tell ?Can you tell ?

1. Mixtures used in everyday life include:

• Air: a mixture of gases such as oxygen, nitrogen, and carbon dioxide.
• Saltwater: a mixture of salt and water.
• Coffee or tea: a mixture of water and coffee or tea leaves.
• Salad: a mixture of various vegetables and dressings.
• Soil: a mixture of minerals, organic matter, and water.

2. Not all mixtures are useful to us. Some mixtures may contain harmful or unwanted substances that make them unusable or unsafe. In such cases, we need to separate the unwanted components from the mixture.

3. To separate the components of a mixture of semolina, salt, and iron filings, we can use the following methods:

• Straining or filtering: This can be used to separate the semolina from the mixture.
• Picking or sorting: This can be used to separate the larger iron filings from the mixture.
• Combing with a magnet: This can be used to attract and separate the iron filings from the mixture.
• Sublimation: This method can be used to separate the salt from the mixture by heating it, causing the salt to vaporize and then condense back into solid form.

Regarding the preparation of sherbet and bhel, the taste of the original ingredients may change due to the processes involved. For example, in sherbet, the flavors of the ingredients may blend together, resulting in a different taste compared to the individual ingredients. Similarly, in bhel, the combination of various ingredients and spices can create a unique flavor.