The Amazing World of Solutes, Solvents, and Solutions
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Types of Solutions and Solubility
SubtopicTypes of Solutions and Solubility under The Amazing World of Solutes, Solvents, and Solutions for Grade 7 CBSE.
Preview questions (no answers)
- 1.
In a solution, the particles of the solute are so small that they:
A.Can be seen with a magnifying glass
B.Settle down after some time
C.Cannot be seen even with a microscope
D.Turn the solution opaque
- 2.
Which of the following will NOT dissolve in water?
A.Glucose
B.Washing soda
C.Mustard oil
D.Potassium permanganate
- 3.
When you open a bottle of soda, bubbles come out. This shows that the gas was ______ in the liquid.
A.Melted
B.Frozen
C.Dissolved
D.Boiled
Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Types of Solutions and Solubility to practice offline. It includes additional chapter-level practice questions.
Saturated and Unsaturated Solutions
SubtopicSaturated and Unsaturated Solutions under The Amazing World of Solutes, Solvents, and Solutions for Grade 7 CBSE.
Preview questions (no answers)
- 1.
Why does powder dissolve faster than a large crystal?
A.Powder is heavier
B.Powder has more surface area in contact with the solvent
C.Crystals are colder
D.Powder is more colorful
- 2.
If you have a saturated solution, what is the state of balance between dissolving and crystallizing called?
A.Unsaturation
B.Equilibrium
C.Dilution
D.Evaporation
- 3.
Which of these is a characteristic of a solution?
A.The parts can be seen clearly
B.The parts separate on standing
C.It is a homogeneous mixture
D.It is always blue
Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Saturated and Unsaturated Solutions to practice offline. It includes additional chapter-level practice questions.
Acids, Bases, and Natural Indicators
SubtopicAcids, Bases, and Natural Indicators under The Amazing World of Solutes, Solvents, and Solutions for Grade 7 CBSE.
Preview questions (no answers)
- 1.
Which of these is a liquid solution of a solid in a liquid?
A.Air
B.Sea water
C.Oxygen gas
D.Brass
- 2.
What is the taste of a basic substance like baking soda?
A.Sour
B.Bitter
C.Sweet
D.No taste
- 3.
Which of the following contains tartaric acid?
A.Unripe mangoes
B.Curd
C.Vinegar
D.Spinach
Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Acids, Bases, and Natural Indicators to practice offline. It includes additional chapter-level practice questions.
Neutralisation in Everyday Life
SubtopicNeutralisation in Everyday Life under The Amazing World of Solutes, Solvents, and Solutions for Grade 7 CBSE.
Preview questions (no answers)
- 1.
The presence of which ion makes a substance acidic?
A.Hydroxyl ions
B.Hydrogen ions
C.Chloride ions
D.Sodium ions
- 2.
Which of these is NOT a base?
A.Magnesium hydroxide
B.Sodium hydroxide
C.Acetic acid
D.Calcium hydroxide
- 3.
If we mix an equal amount of a strong acid and a strong base, the resulting solution will be:
A.Very acidic
B.Very basic
C.Neutral
D.Bitter
Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Neutralisation in Everyday Life to practice offline. It includes additional chapter-level practice questions.
Physical and Chemical Changes
SubtopicPhysical and Chemical Changes under The Amazing World of Solutes, Solvents, and Solutions for Grade 7 CBSE.
Preview questions (no answers)
- 1.
Beating a piece of aluminum to make aluminum foil is a:
A.Physical change
B.Chemical change
C.Natural change
D.Chemical reaction
- 2.
The melting of a glacier due to global warming is a:
A.Chemical change
B.Physical change
C.Periodic change
D.Biological change
- 3.
During a chemical change, which of the following might occur?
A.Evolution of a gas
B.Change in color
C.Production of heat
D.All of the above
Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Physical and Chemical Changes to practice offline. It includes additional chapter-level practice questions.
Rusting of Iron and Crystallisation
SubtopicRusting of Iron and Crystallisation under The Amazing World of Solutes, Solvents, and Solutions for Grade 7 CBSE.
Preview questions (no answers)
- 1.
If you leave an iron nail in a glass of distilled water and another in a glass of salty water, which nail will rust more?
A.The one in distilled water
B.The one in salty water
C.Both will rust equally
D.Neither will rust
- 2.
Which of these is a solution where the solvent is NOT water?
A.Saltwater
B.Sugar syrup
C.Iodine in alcohol
D.Lemonade
- 3.
Pure crystals of which substance can be obtained using dilute sulphuric acid and boiling water?
A.Iron oxide
B.Common salt
C.Copper sulphate
D.Calcium carbonate
Download the worksheet for The Amazing World of Solutes, Solvents, and Solutions - Rusting of Iron and Crystallisation to practice offline. It includes additional chapter-level practice questions.