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All questions of Materials: Properties and Changes for Class 6 Exam
Which process involves particles at the surface of a liquid gaining enough energy to become gas?- a)Boiling
- b)Melting
- c)Evaporation
- d)Freezing
Correct answer is option 'C'. Can you explain this answer?
Which process involves particles at the surface of a liquid gaining enough energy to become gas?
a)
Boiling
b)
Melting
c)
Evaporation
d)
Freezing
|
Subset Academy answered |
Evaporation occurs when particles at the surface of a liquid gain sufficient energy to escape as gas. Unlike boiling, evaporation can happen at any temperature.
What happens during a chemical reaction?- a)The physical state of the substance changes
- b)The substance reverses its state
- c)The substance becomes invisible
- d)A new substance is formed
Correct answer is option 'D'. Can you explain this answer?
What happens during a chemical reaction?
a)
The physical state of the substance changes
b)
The substance reverses its state
c)
The substance becomes invisible
d)
A new substance is formed
|
Torcia Education answered |
In a chemical reaction, reactants undergo a change to form new products with different properties. For example, burning wood produces ash and gases.
What is the boiling point of pure water?- a)50 °C
- b)118 °C
- c)0 °C
- d)100 °C
Correct answer is option 'D'. Can you explain this answer?
What is the boiling point of pure water?
a)
50 °C
b)
118 °C
c)
0 °C
d)
100 °C
|
Freak Artworks answered |
Pure water boils at 100 °C under standard atmospheric pressure. This is a characteristic property of water.
Which of the following is an example of a reversible change?- a)Burning wood
- b)Melting ice
- c)Rusting iron
- d)Baking a cake
Correct answer is option 'B'. Can you explain this answer?
Which of the following is an example of a reversible change?
a)
Burning wood
b)
Melting ice
c)
Rusting iron
d)
Baking a cake
|
Rahul Kumar answered |
Melting ice is a reversible change because liquid water can be frozen back into ice without forming a new substance.
What is evidence of a chemical reaction between vinegar and bicarbonate of soda?- a)The mixture dissolves completely.
- b)A visible gas is produced.
- c)The substances remain unchanged.
- d)The mixture becomes a solid.
Correct answer is option 'B'. Can you explain this answer?
What is evidence of a chemical reaction between vinegar and bicarbonate of soda?
a)
The mixture dissolves completely.
b)
A visible gas is produced.
c)
The substances remain unchanged.
d)
The mixture becomes a solid.
|
Keystone Instructors answered |
The production of a visible gas when vinegar and bicarbonate of soda react is evidence of a chemical reaction occurring.
What is formed when a solute dissolves in a solvent?- a)A reactant
- b)A mixture
- c)A product
- d)A solution
Correct answer is option 'D'. Can you explain this answer?
What is formed when a solute dissolves in a solvent?
a)
A reactant
b)
A mixture
c)
A product
d)
A solution
|
|
Rahul Kumar answered |
When a solute dissolves in a solvent, the resulting uniform mixture is called a solution. For example, salt dissolving in water forms a saline solution.
Which factor can speed up the dissolving of solids in a liquid?- a)Cooling the liquid
- b)Stirring the liquid
- c)Adding more solute
- d)Decreasing the surface area of the solute
Correct answer is option 'B'. Can you explain this answer?
Which factor can speed up the dissolving of solids in a liquid?
a)
Cooling the liquid
b)
Stirring the liquid
c)
Adding more solute
d)
Decreasing the surface area of the solute
|
|
Torcia Education answered |
Stirring increases the rate of dissolving by spreading out the solute particles more quickly into the solvent.
What is the melting point of a substance?- a)The temperature at which it turns into gas
- b)The temperature at which it turns from solid to liquid
- c)The temperature at which it boils
- d)The temperature at which it evaporates
Correct answer is option 'B'. Can you explain this answer?
What is the melting point of a substance?
a)
The temperature at which it turns into gas
b)
The temperature at which it turns from solid to liquid
c)
The temperature at which it boils
d)
The temperature at which it evaporates
|
Edgy Education answered |
The melting point is the specific temperature at which a solid changes into a liquid. For example, ice melts at 0 °C, and gold melts at 1064 °C.
Which property allows metals to transfer heat effectively?- a)Thermal conductivity
- b)Electrical conductivity
- c)Solubility
- d)Reactivity
Correct answer is option 'A'. Can you explain this answer?
Which property allows metals to transfer heat effectively?
a)
Thermal conductivity
b)
Electrical conductivity
c)
Solubility
d)
Reactivity
|
|
Subset Academy answered |
Metals are excellent thermal conductors because they transfer heat efficiently. Silver is the best thermal conductor among metals.
Why does sugar dissolve faster in hot water than in cold water?- a)Hot water has less energy.
- b)Hot water particles move faster, aiding solute movement.
- c)Cold water particles spread out more.
- d)Hot water changes the chemical composition of sugar.
Correct answer is option 'B'. Can you explain this answer?
Why does sugar dissolve faster in hot water than in cold water?
a)
Hot water has less energy.
b)
Hot water particles move faster, aiding solute movement.
c)
Cold water particles spread out more.
d)
Hot water changes the chemical composition of sugar.
|
|
Keystone Instructors answered |
Heating a solvent like water adds energy, making particles move faster, which helps solute particles (sugar) dissolve more quickly.
Chapter doubts & questions for Materials: Properties and Changes - Year 6 Science IGCSE (Cambridge) 2025 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Year 6 Science IGCSE (Cambridge)
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