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प्रश्न
Define the following term of Matter .
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उत्तर
Matter—Anything that has mass and occupies space is called matter.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Liquids have definite volume but do not have definite shape.
What are molecules ?
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
What is the other name for impure substances ? Give two examples of impure substances.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Choose the correct answer.
A 15% alcohol solution means :
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 source from which nitrogen and oxygen are obtained on a large scale.
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
How is cream separated from milk ?
Select the correct answer from A, B, C, D & E for the statement given below:
An atom or group of atoms _________ having a resultant charge.
Which among the following ______ will get attracted to by magnet?
Define the term matter.
