Class 10 Science Chapter 2: Acids, Bases and Salts Sample paper .

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 Class 10 Science Chapter 2: Acids, Bases and Salts Sample Paper

Section A: Multiple Choice Questions




  1. Which of the following is an acid?

    • Sodium hydroxide
    • Hydrochloric acid
    • Sodium chloride
    • Sugar

  2. Which of the following is a base?

    • Hydrochloric acid
    • Sulfuric acid
    • Sodium hydroxide
    • Potassium nitrate

  3. Which of the following is a salt?

    • Sodium chloride
    • Potassium nitrate
    • Sugar
    • Water

  4. Which of the following indicators turns red in acidic solutions?

    • Litmus paper
    • Phenolphthalein
    • Methyl orange
    • All of the above

  5. Which of the following is a property of acids?

    • They turn blue litmus paper red.
    • They have a sour taste.
    • They react with metals to produce hydrogen gas.
    • All of the above

Section B: Short Answer Questions

  1. What is the difference between an acid and a base?

Acids are substances that release hydrogen ions (H+) in water. Bases are substances that release hydroxide ions (OH-) in water.

  1. What are the different types of acids and bases?

There are many different types of acids and bases. Some common examples include:

  • Acids: Hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3)
  • Bases: Sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca(OH)2)

  1. What are the properties of acids and bases?

Acids and bases have a number of different properties, including:

  • Acids:
    • Turn blue litmus paper red.
    • Have a sour taste.
    • React with metals to produce hydrogen gas.
    • React with bases to produce salts and water.
  • Bases:
    • Turn red litmus paper blue.
    • Have a bitter taste.
    • React with acids to produce salts and water.

  1. What are the uses of acids and bases?

Acids and bases have a wide range of uses in industry and everyday life. Some common examples include:

  • Acids are used in the production of fertilizers, plastics, and other chemicals.
  • Bases are used in the production of soap, detergents, and other cleaning products.
  • Acids and bases are also used in food processing, medicine, and water treatment.

  1. What are the safety precautions that should be taken when working with acids and bases?

Acids and bases can be dangerous substances, so it is important to take safety precautions when working with them. Some important safety precautions include:

  • Always wear gloves and eye protection when working with acids and bases.
  • Be careful not to spill acids or bases on your skin or clothing.
  • If you do spill an acid or base, rinse the affected area immediately with water.
  • Never mix acids and bases together.

Section C: Long Answer Question

  • What is a salt?

A salt is a compound that is formed when an acid reacts with a base. It is composed of a cation (positively charged ion) from the base and an anion (negatively charged ion) from the acid.

  • What are the different types of salts?

There are many different types of salts. Some common examples include:

* Sodium chloride (NaCl), the salt that we use in cooking
* Potassium nitrate (KNO3), a fertilizer
* Calcium carbonate (CaCO3), a component of limestone

  • What are the properties of salts?

Salts have a number of different properties, including:

* They are generally white or colorless.
* They are soluble in water.
* They have a salty taste.

  • What are the uses of salts?

Salts have a wide range of uses in industry and everyday life. Some common examples include:

* In cooking, salts are used to add flavor and preserve food.
* In agriculture, salts are used as fertilizers.
* In industry, salts are used in a variety of products, including soaps, detergents, and batteries.


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