Unit - 11 Some Useful Chemical

Description

Unit - 11

Some Useful Chemical

Summary

1. We use different types of chemicals in our daily life.

2. Chemicals have different properties and tastes.

3. Chemicals have various uses.

4. Baking soda is used in bakery industries.

5. Ghee provides strength to the body.

6. Chuk is used to make pickles.

7. Sugar is used to preserve foods.

8. Table salt is used in food for flavor.


3. Write answers to the following questions:

  (a) List five chemicals used in daily life.

  (b) Any two useful articles of baking soda.

  (c) What is the taste of chook? Why is it used in food?

  (d) What is the taste of table salt? Write any two uses of it.

Answer ðŸ‘‰ 

(a) Here are five chemicals used in daily life:

  • Water
  • Soap
  • Detergent
  • Bleach
  • Paint

(b) Here are two useful articles of baking soda:

  • Baking soda can be used to make baked goods rise.
  • Baking soda can be used to clean surfaces.


(c) Chuk is a type of salt that is used in Indian cuisine. It has a salty, sour, and slightly sweet taste. Chuk is used in food to add flavor and to preserve food.


(d) Table salt has a salty taste. It is used in food to add flavor and to preserve food. Table salt can also be used to de-ice sidewalks and driveways, and to clean surfaces.

Here are two additional uses of table salt:

  • Table salt can be used to make brine, which is a solution of salt and water. Brine can be used to pickle vegetables, cure meats, and preserve fish.
  • Table salt can be used to make ice packs. To make an ice pack, mix equal parts salt and water in a zip-top bag. Freeze the bag, and then use it to apply cold to an injured area.


4. Distinguish between:
(a) Baking soda and table salt
Here are some of the key differences between baking soda and table salt,:

  • Chemical composition: Baking soda is a chemical compound with the formula NaHCO₃, while table salt is a chemical compound with the formula NaCl.
  • Taste: Baking soda has a slightly salty, bitter taste, while table salt has a salty taste.
  • Uses: Baking soda is used in baking, cleaning, and medicine, while table salt is used in cooking, preserving food, and de-icing.
  • Health effects: Baking soda is generally considered safe for most people, but it can cause stomach upset in some people. Table salt is also generally considered safe for most people, but it can raise blood pressure in some people.

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