Class 6 Science Chapter 1 MCQ

An iodine solution is used to test the presence of starch in our food. Carbohydrates found in our food are in the form of starch and sugars. A dilute solution of iodine can be prepared by adding a few drops of tincture iodine to a test tube half filled with water.

We know that water does not provide any nutrients but it has many important role in our body as (i) To control and regulate the body temperature, (ii) To get rid of waste products from the body, (iii) To absorb nutrients from the foods and to transport digested food to different body cells. But water does not protect our body against diseases.

Egg is a source of protein, the mineral as calcium and vitamin-D, vitamin-B12. But egg yolk is rich in “fat” and egg albumin is rich in “protein”.

Generally, as a deficiency disease “Vitamin-A” creates – loss of vision or poor vision, loss of vision in darkness (night), sometimes complete loss of vision.

Spinach is a good source of the mineral “Iron”. Whereas, we got calcium and phosphorus from milk and milk products. The chemical name of salt is “sodium chloride”.

Copper sulphate solution and caustic soda solution are used to test the presence of protein while iodine solution is used for starch test.

Deficiency disease is a disease which arises due to the lack of nutrients in our diet over a long period of time, e.g. Scurvy, Kwashiorkor. To prevent these diseases, it is essential to have a balance diet. It is a diet, which contains adequate amounts of all the nutrients as well as sufficient quantity of water and roughage.

Vitamin-C, gets easily destroyed by heat during cooking. At the same time, cooking also results in the loss of certain nutrients.

A deficiency disease “rickets” which is caused due to the lack of “vitamin-D” in our body. In this case, bones become soft and bent, unable to stand and walk and body appears very thin.

Calcium and phosphorus are the minerals are needed in our body for building bones and teeth.

Roughage and water are the components of food that do not provide any nutrients to our body but they are essential to us.

We know that water does not provide any nutrients but it has many important role in our body as (i) helps to maintain a constant body temperature, (ii) to get rid of waste products from the body, (iii) to absorb nutrients from the foods and (iv) to transport digested food to different body cells.

Carbohydrates and fats mainly provide energy to our body. Therefore, fats and carbohydrates are called energy giving foods. Proteins are needed for the growth and repair of our body. Therefore, they are often called body building foods. Whereas, the vitamins help in protecting our body against diseases. And for the proper growth of body and to maintain good health, minerals are needed to our body.

There are some components which contain some ingredients (e.g. carbohydrates, proteins, fats, vitamins and minerals) that are needed by our body. These components are called nutrients. Roughage does not provide any nutrient to our body, it helps our body get rid of undigested food. Vitamin helps in protecting against diseases and minerals assist in proper functioning, normal growth and good health.

Vitamin D was discovered in 1920, culminating the long search for a way to cure rickets, a painful childhood bone disease. When our skin is exposed to sunlight, it makes vitamin D from cholesterol. The sun’s ultraviolet B (UVB) rays hit cholesterol in the skin cells, providing the energy for vitamin D3 synthesis to occur.

Dietary fibres are not present in milk while whole grains, whole pulses, fruits and vegetables are the sources of dietary fibre.

A deficiency disease Scurvy which is caused due to the lack of “vitamin-C” in our body. In this case, wounds take longer time to heal and bleeding can be seen in gums.

Fast food like potato chips, pizza, burger, etc. are very good in taste and they contain huge amount of Fat. And fried food like samosa and poori, malai, rabdi and peda also contains fat.

Copper sulphate solution and caustic soda solution are used to test the presence of protein while iodine solution is used for starch test. And presence of fat can be seen when we take a small quantity of a food item. Wrapped it, in a piece of paper and crush it. Oily patches show the presence of fat.

The presence of proteins in a food material is tested on the basis of a reaction between proteins and alkaline solution of copper sulphate, that gives a violet colour. The test involves the following steps in sequences: II, I, IV, III.

Carbohydrates mainly provide energy to our body. Fats also give us energy. In fact, fats give much more energy as compared to the same amount of carbohydrates.

The Vitamin-C rich fruit is great for our immunity, heart, skin and hair. Amla or the Indian gooseberry is a fruit which is popular for its many health benefits.

Dehydration is when someone loses more fluids than he or she takes in. Dehydration, symptoms are: dry mouth, lethargy, weakness in muscles, headache, dizziness. Drinking water, oral rehydration solution (ORS) or sports drinks to replace lost fluids may help prevent dehydration. Finding a place to cool down may also help.

“Vitamins” help in protecting against diseases and “Minerals” assist in proper functioning normal growth and good health. Therefore, they are referred as protective foods.

“Vitamins” help in protecting against many diseases. These are also necessary for good eyesight (vitamin-A), growth (Vitamin-B1), keeping teeth gums and joints healthy (Vitamin-C) and the normal growth of bones and teeth (Vitamin-D)