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प्रश्न
State whether the following statement is true or false :
Bread is an example of solid foam.
पर्याय
True
False
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उत्तर
True. Solid foam allows the gas to get dispersed in solid medium.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Name the terms for the change of a solid into liquid.
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Name a liquid which can be classified as a pure substance and conducts electricity.
What is meant by saying that metals are lustrous ?
Name one element, one compound and one mixture.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Name a metal which can be easily cut with a knife.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
The elements which normally exist in the liquid state are :
What happens when the temperature of a saturated sugar solution is increased ?
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
What is the difference between colloids and suspensions ?
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
The best way to recover sugar from an aqueous sugar solution is :
Which one of the following scrap metal cannot be separated by magnetic separation ?
Give some examples of the Tyndall effect observed in your surroundings?
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
