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प्रश्न
All kinds of matter
विकल्प
occupy space and have definite mass
have mass and definite shape
can change their states
have definite volume
उत्तर
occupy space and have definite mass
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Liquids have definite shape and definite volume.
Fill in the blank
Liquids have a definite ______
Which one is a kind of matter:
What is meant by saying that metals are lustrous ?
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
Name two solid, two liquid and two gaseous elements at the room temperature.
State any two properties for believing that aluminium is a metal.
Choose the correct answer.
A 5 per cent sugar solution means that :
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
Define Foam Give one example.
One of the following represents the solution of solid in a solid. 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.
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
______ is so hard that it can scratch glass.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Define the term matter.
Define the term matter.
Define the term matter.
