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Mindful Eating: A Pathway to Health - How to Test Different Components of Food

Grade 6CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Nutrients are chemical substances in food that our body needs to grow, repair itself, and function properly. The major nutrients are Carbohydrates, Proteins, Fats, Vitamins, and Minerals.

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Test for Starch: To test for carbohydrates (starch), add 2-3 drops of dilute Iodine solution to the food. If the food turns blue-black, it contains starch.

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Test for Protein: Grind the food into a paste, add 2 drops of Copper Sulphate (CuSO4CuSO_4) and 10 drops of Caustic Soda (NaOHNaOH). A change to violet color indicates the presence of protein.

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Test for Fats: Rub the food on a piece of paper. If an oily, translucent patch appears, the food contains fat.

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Roughage (Dietary Fiber) and Water: These do not provide nutrients but are essential for getting rid of undigested food and maintaining body functions.

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A Balanced Diet is a diet that contains all the required nutrients in the right proportions, along with sufficient roughage and water.

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Mindful Eating involves paying attention to the food we eat, the nutrients it provides, and the signals of hunger and fullness from our body.

📐Formulae

Food Sample+Iodine Solution→Blue-Black Color (Starch present)\text{Food Sample} + \text{Iodine Solution} \rightarrow \text{Blue-Black Color (Starch present)}

Food Paste+2 drops CuSO4+10 drops NaOH→Violet Color (Protein present)\text{Food Paste} + 2 \text{ drops } CuSO_4 + 10 \text{ drops } NaOH \rightarrow \text{Violet Color (Protein present)}

Total Nutrient Weight=Carbohydrates+Proteins+Fats+Vitamins+Minerals\text{Total Nutrient Weight} = \text{Carbohydrates} + \text{Proteins} + \text{Fats} + \text{Vitamins} + \text{Minerals}

💡Examples

Problem 1:

A student analyzed a lunch box containing 150 g150\text{ g} of rice (carbohydrates), 75 g75\text{ g} of dal (protein), and 25 g25\text{ g} of butter (fats). Calculate the total weight of these three components.

Solution:

15075+25250\begin{array}{r} 150 \\ 75 \\ + 25 \\ \hline 250 \end{array}

Explanation:

By adding the individual weights of the different food components (150+75+25150 + 75 + 25), we find that the total weight of the major nutrients is 250 g250\text{ g}.

Problem 2:

During a science experiment, Rohan added 1010 drops of Sodium Hydroxide and 22 drops of Copper Sulphate to a mashed potato sample. The color did not turn violet. What does this conclude?

Solution:

The absence of violet color means the potato sample does not contain a significant amount of Protein.

Explanation:

The specific chemical test using CuSO4CuSO_4 and NaOHNaOH is for proteins. If the solution remains the same color and does not turn violet, proteins are absent.