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प्रश्न
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
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उत्तर
Brass is an alloy, which is considered as mixture.
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संबंधित प्रश्न
Liquids have definite shape and definite volume.
Define the following term of Atom .
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.
Which type of elements, metals or non-metals, show the property of brittleness ?
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
Which of the following does not have a fixed melting point/boiling point ?
What happens when the temperature of a saturated sugar solution is increased ?
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
Define the emulsion. Give one example.
What is a suspension ? Give two examples of suspensions.
Name the process which is used in milk dairies to separate cream from milk.
Describe a method to separate a mixture of camphor and sand.
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
Gases change to liquid by the process of ______.
Define the term matter.
