Major Nutrients and Food Testing

Section 1: Major Nutrients and Food Testing

Focus: Identifying carbohydrates, proteins, fats, and the chemical tests used to detect them.

The main carbohydrates found in our food are in the form of:

(a) Fiber and minerals

(b) Starch and sugars

(c) Proteins and fats

(d) Vitamins and water

Answer: (b)

Which chemical is used to test the presence of starch in a food item?

(a) Copper sulphate solution

(b) Caustic soda

(c) Iodine solution

(d) Alcohol

Answer: (c)

If a food item turns blue-black after adding iodine, it indicates the presence of:

(a) Proteins

(b) Fats

(c) Starch

(d) Vitamins

Answer: (c)

Which solution is required, along with caustic soda, to test for proteins?

(a) Iodine solution

(b) Copper sulphate solution

(c) Salt solution

(d) Sugar solution

Answer: (b)

A violet color during a food test indicates the presence of:

(a) Starch

(b) Fats

(c) Proteins

(d) Carbohydrates

Answer: (c)

An oily patch on a piece of paper used to wrap food indicates the presence of:

(a) Starch

(b) Proteins

(c) Fats

(d) Water

Answer: (c)

Which of the following are 'energy-giving foods'?

(a) Carbohydrates and fats

(b) Proteins and minerals

(c) Vitamins and dietary fibers

(d) Water and roughage

Answer: (a)

Which nutrient provides nearly double the energy compared to the same amount of carbohydrates?

(a) Proteins

(b) Vitamins

(c) Fats

(d) Minerals

Answer: (c)

Foods containing ________ are often called 'body-building foods'.

(a) Carbohydrates

(b) Fats

(c) Proteins

(d) Dietary fibers

Answer: (c)

Which of these is a plant source of proteins?

(a) Milk

(b) Fish

(c) Moong dal

(d) Paneer

Answer: (c)

Which of these is an animal source of fats?

(a) Groundnut

(b) Mustard oil

(c) Butter

(d) Coconut oil

Answer: (c)

What is the primary function of vitamins in our body?

(a) To give energy

(b) To build muscles

(c) To protect the body against diseases

(d) To help in digestion only

Answer: (c)

Vitamin A is essential for:

(a) Keeping skin and eyes healthy

(b) Strong bones

(c) Rapid growth

(d) Clotting of blood

Answer: (a)

Which vitamin helps the body to fight against many diseases?

(a) Vitamin A

(b) Vitamin C

(c) Vitamin D

(d) Vitamin K

Answer: (b)

Our body prepares Vitamin D in the presence of:

(a) Water

(b) Moonlight

(c) Sunlight

(d) Air

Answer: (c)