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प्रश्न
Which one is a kind of matter:
पर्याय
light
petroleum
sound
heat
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उत्तर
petroleum
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संबंधित प्रश्न
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
Name a non-metal which is a good conductor of electricity.
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
Give reason why copper metal is used for making electric wires.
Which one of the following is not a metalloid ?
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
What is the most common way of expressing the concentration of a solution ?
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
Name the different types of solutions. Give one example of each.
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 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 ?
How will you separate camphor, common salt and iron nails from their mixture ?
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
Which among the following is not a matter?
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Solids possess very high kinetic energy.
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
