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Not all delicious foods are necessarily healthy, while not all nutritious foods are always enjoyable. Share your thoughts along with a few examples.

Medu does not eat vegetables but enjoys biscuits, noodles and white bread. He often has stomach ache and constipation. What changes should he make in his diet to get rid of these problems? Explain your answer.

You are provided the following:
(i) Canned fruit juice
(ii) Fresh fruit juice
(iii) Fresh fruit
Which one would you prefer and why?

Sugar is an example of carbohydrates. Sugar is tested with iodine solution but it does not change to blue-black colour. 
What can be a possible reason?

What do you think of Raman’s statement, “All starches are carbohydrates but not all carbohydrates are starches.’’ 
Describe the design of an activity to test your answer.

While using iodine in the laboratory, a few drops of iodine fell on Mishti’s socks and a few fell on her teacher’s saree. The drops of iodine on the saree turned blue-black while the colour on the socks did not change. What can be a possible reason?

Why are millets considered a healthy choice of food? Can eating just millets suffice for the nutritional requirements of the body? Discuss.

You are given a sample of a solution. How would you check the possibility of it being an iodine solution?