The Amazing World of Solutes Solvents and Solutions Class 8 Fill in the Blanks
hardThe Amazing World of Solutes Solvents and Solutions Class 8 Fill in the Blanks
The Amazing World of Solutes Solvents and Solutions Class 8 Fill in the Blanks
Question 1.
When a substance is heated, its particles tend to move ............ apart, which generally leads to an increase in volume and a decrease in .............
Answer:
farther, density
Question 2.
The process by which a solid object is submerged in water to measure its volume is called the method of .............
Answer:
displacement
The Amazing World of Solutes Solvents and Solutions Class 8 True or False
Question 1.
The solid component in a solution is known as the solvent.
Answer:
False
Question 2.
A saturated solution can dissolve more solute at a given temperature.
Answer:
False
Question 3.
The solubility of gases generally increases with an increase in temperature.
Answer:
False
Question 4.
In a solution formed by mixing two liquids, the component present in greater quantity is known as the solvent.
Answer:
True
Question 5.
Density is defined as the mass per unit volume of a substance.
Answer:
True
The Amazing World of Solutes Solvents and Solutions Class 8 Match the Following
Question 1.
Match the items given in Column A with those of given in Column B.
| Column A | Column B |
| (i) Saturated solution | (a) Substance that dissolves the solute |
| (ii) Density | (b) Maximum amount of solute dissolved at a given temperature |
| (iii) Solvent | (c) Substance that is dissolved in a solution |
| (iv) Solute | (d) Mass per unit volume of a substance |
Answer:
| Column A | Column B |
| (i) Saturated solution | (b) Maximum amount of solute dissolved at a given temperature |
| (ii) Density | (d) Mass per unit volume of a substance |
| (iii) Solvent | (a) Substance that dissolves the solute |
| (iv) Solute | (c) Substance that is dissolved in a solution |
Question 2.
Match the items given in Column A with those of given in Column B.
| Column A | Column B |
| (i) Displacement method | (a) Density [latex]\frac{\text { Mass }}{\text { Volume }}[/latex] |
| (ii) Formula for density | (b) Used for measuring the volume of irregular solids |
| (iii) Measuring cylinder | (c) Resets the balance to zero before weighing |
| (iv) Tare function | (d) Used for measuring the volume of liquids |
Answer:
| Column A | Column B |
| (i) Displacement method | (b) Used for measuring the volume of irregular solids |
| (ii) Formula for density | (a) Density [latex]\frac{\text { Mass }}{\text { Volume }}[/latex] |
| (iii) Measuring cylinder | (d) Used for measuring the volume of liquids |
| (iv) Tare function | (c) Resets the balance to zero before weighing |
Question 3.
Match the items given in Column A with those of given in Column B.
| Column A | Column B |
| (i) Object floats | (a) Explains buoyancy in fluids |
| (ii) Object sinks | (b) Approximately 1 g/cm3 at room temperature |
| (iii) Density of water | (c) Density of the object is less than that of the liquid |
| (iv) Archimedes principle | (d) Density of the object is greater than that of the liquid |
Answer:
| Column A | Column B |
| (i) Object floats | (c) Density of the object is less than that of the liquid |
| (ii) Object sinks | (d) Density of the object is greater than that of the liquid |
| (iii) Density of water | (b) Approximately 1 g/cm3 at room temperature |
| (iv) Archimedes principle | (a) Explains buoyancy in fluids |