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प्रश्न
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
उत्तर
An element is made up of only one kind of atoms.
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संबंधित प्रश्न
Liquids have definite shape and definite volume.
When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
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
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Name a liquid which can be classified as a pure substance and conducts electricity.
What is meant by saying that metals are malleable and ductile ?
Give reason why copper metal is used for making electric wires.
What are the three general classes of matter ? Give one example of each type.
Draw a flow-chart for the schematic representation of different types of matter.
Which one of the following is not a metalloid ?
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Define Foam Give one example.
Name the process which can be used to purify an impure sample of copper sulphate.
How would you separate iodine from a mixture of iodine and common salt ?
Pure copper sulphate can be obtained from an impure sample by the process of :
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
The property which allows the metals to be hammered into their sheets is ______.
______ is a smallest particle.
Liquids have ______.
