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प्रश्न
Fill in the blank
All matter is made up of tiny particles called ______
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उत्तर
All matter is made up of tiny particles called atoms.
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संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Fill in the blank :
The substances which can flow are called ________
Name the terms for the particles of matter which may or may not have independent existence.
Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.
Give reason why graphite is used for making elecrode in a dry cell.
Name a metal which can be easily cut with a knife.
“Is malleable and ductile” best describes :
What is the difference between solutions and colloids ?
How will you differentiate between a suspension and a colloid ?
Which of the following is not an emulsion ?
One of the following represents the solution of solid in a solid. This one is :
100 mL of water at room temperature of 25°C is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring, while keeping the temperature of solution constant at 30°C. After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker.
- The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.
- What name is given to solutions like X ?
- What name is given to solutions like Y ?
- What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the beaker in crushed ice ? Why ?
- What term is used to denote the amount of solid dissolved in 100 grams of water in a solution lie Y ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
Name the process you would use to separate a mixture of water and alcohol.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
How will you separate a mixture containing sand and sugar ?
Which of the following mixture cannot be separated by using water as the solvent ?
Wipe the board with a duster and then tap the duster against the table. What do you see?
Atoms or groups of atoms having a charge are called ______.
Define the term matter.
