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प्रश्न
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
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उत्तर
If a mixture contains iron fillings as one of the constituents, it can be separated by using a magnet.
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संबंधित प्रश्न
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
What are molecules ?
Explain why steel is used to make railway lines.
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Name the property which enables metals to be drawn into wires.
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
What are the two types of pure substances? Give one example of each type.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
What is the effect of temperature on the solubility of solids in liquids ?
One of the following liquids will leave behind a residue on heating. This one is :
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
Name the process by which common salt is purified.
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
How will you separate water from mustard oil ?
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Rusting of an article made up of iron is called
Define the term matter.
