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प्रश्न
Define matter.
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उत्तर
Anything that has mass and occupies space is called matter.
संबंधित प्रश्न
The inter-molecular space is maximum in
Fill in the blank :
The substances which can flow are called ________
Name the terms for the change of a solid into liquid.
State two characteristics of matter demonstrated by Brownian motion.
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
Give reason why copper metal is used for making electric wires.
How would you confirm that a colourless liquid given to your is pure water ?
State whether colloidal solutions are homogeneous or heterogeneous.
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
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.
Describe a method to separate a mixture of camphor and sand.
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
______ is not made of matter.
All the matter made of ______.
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
The most reactive metal is ______.
Liquids cannot be compressed and they have fixed volume.
Intermolecular space is maximum in ______.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
