Exercise

Harsh once went to a poor family having two children. He saw that both the children had a protruding belly, swollen legs, and were underweight. He advised their parents to give children enough milk, pulses and eggs.

Answer the following questions based on the above information :

Which values are displayed by Harsh in taking this initiative?

How can you test the protein in a food items? Explain with an experiment.

While working in the laboratory, Aakash spilled a few drops of iodine solution on his shirt and socks. The drops of iodine on the shirt turned blue-black while the colour did not change on the socks. What could be the possible reason?

We use iodine solution to test the presence of:

The leaves of a plant combine a gas A taken from air and a liquid B taken from the soil in the presence of sunlight to make a simple food C by the process called D. Some of the simple food C gets converted into a complex food E which is stored in the various parts of the plant including its leaves.

Which of the two foods, C or E, will give blue-black colour with dilute iodine solution?

A slice of bread gives a positive iodine test. However, if the slice is thoroughly chewed, the test is negative. Explain giving reasons.

Rajesh has been diagnosed with obesity and anaemia. He is advised by the doctor to avoid fats and increase the iron content in his diet. Rajesh needs to test for these food components before consuming.

Can you help him in testing the following food products :

Spinach

A beaker contains a mixture of salt, sand, and water.

The mixture is filtered using filter paper.

What is substance 'X'?