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The Amazing World of Solutes, Solvents, and Solutions

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Identifying Solutes and Solvents

Subtopic

Identifying Solutes and Solvents under The Amazing World of Solutes, Solvents, and Solutions for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Mouthwash often contains a small amount of peppermint oil dissolved in alcohol and water. Peppermint oil is an example of a:

    A.

    Solvent

    B.

    Solute

    C.

    Homogeneous catalyst

    D.

    Pure element

  2. 2.

    If you mix a packet of instant coffee powder into a mug of hot water, the coffee powder is the:

    A.

    Solvent

    B.

    Solute

    C.

    Residue

    D.

    Filtrate

  3. 3.

    In a solution of 'milk of magnesia', small particles are dispersed but if we consider a clear solution of Epsom salt in water, the salt is the:

    A.

    Solvent

    B.

    Solute

    C.

    Suspension

    D.

    Filter

Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Identifying Solutes and Solvents to practice offline. It includes additional chapter-level practice questions.

Types of Solutions and Their Properties

Subtopic

Types of Solutions and Their Properties under The Amazing World of Solutes, Solvents, and Solutions for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A solution of iodine in alcohol is known as:

    A.

    Iodine syrup

    B.

    Aqueous iodine

    C.

    Tincture of iodine

    D.

    Iodized alcohol

  2. 2.

    Why can a true solution pass through a filter paper without leaving any residue?

    A.

    Because the particles are very large

    B.

    Because the particles are extremely small

    C.

    Because the solvent is sticky

    D.

    Because the solute is a gas

  3. 3.

    If 50 g50 \text{ g} of sugar is present in 250 g250 \text{ g} of a sugar solution, what is the concentration in terms of mass percentage?

    A.

    25%25\%

    B.

    20%20\%

    C.

    15%15\%

    D.

    10%10\%

Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Types of Solutions and Their Properties to practice offline. It includes additional chapter-level practice questions.

Understanding Solubility and Saturated Solutions

Subtopic

Understanding Solubility and Saturated Solutions under The Amazing World of Solutes, Solvents, and Solutions for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Sea water is a complex solution. Which of the following is a primary solute in it?

    A.

    Distilled water

    B.

    Common salt

    C.

    Sand

    D.

    Fish

  2. 2.

    If you have an unsaturated solution of sugar, you can make it saturated by:

    A.

    Adding more water

    B.

    Adding more sugar

    C.

    Heating it up

    D.

    Filtering it

  3. 3.

    Which state of matter can act as a solvent?

    A.

    Only liquids

    B.

    Only gases

    C.

    Only solids

    D.

    Solids, liquids, and gases

Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Understanding Solubility and Saturated Solutions to practice offline. It includes additional chapter-level practice questions.

Factors Affecting Dissolution Rate

Subtopic

Factors Affecting Dissolution Rate under The Amazing World of Solutes, Solvents, and Solutions for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the name for a mixture that is the same throughout (uniform)?

    A.

    Heterogeneous

    B.

    Homogeneous

    C.

    Compound

    D.

    Element

  2. 2.

    If you want to dissolve a solid in a liquid very slowly, you should:

    A.

    Heat the liquid

    B.

    Stir the liquid rapidly

    C.

    Keep the liquid very cold

    D.

    Grind the solid into powder

  3. 3.

    Vinegar is a solution of acetic acid in water. What is the solute in vinegar?

    A.

    Water

    B.

    Acetic acid

    C.

    Sugar

    D.

    Salt

Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Factors Affecting Dissolution Rate to practice offline. It includes additional chapter-level practice questions.

Concentration of Solutions

Subtopic

Concentration of Solutions under The Amazing World of Solutes, Solvents, and Solutions for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A student prepares a solution by dissolving 15g15g of glucose in enough water to make the total volume of the solution 100mL100mL. Based on the diagram, what is the concentration of this solution expressed as a mass by volume percentage?

    A.

    1.5%1.5\%

    B.

    15%15\%

    C.

    85%85\%

    D.

    115%115\%

  2. 2.

    Two liquids that mix completely with each other to form a solution are said to be:

    A.

    Immiscible

    B.

    Miscible

    C.

    Insoluble

    D.

    Saturated

  3. 3.

    If 40g40g of sugar is dissolved in 160g160g of water, what is the mass by mass percentage of the solution?

    A.

    20%20\%

    B.

    25%25\%

    C.

    40%40\%

    D.

    15%15\%

Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Concentration of Solutions to practice offline. It includes additional chapter-level practice questions.

The Amazing World of Solutes, Solvents, and Solutions - Class 8 Science (CBSE) | Krit.club