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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 inter-molecular force is maximum in
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
What are the characteristics of matter?
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
The three important metalloids are.............................. and ..........................
What are the three general classes of matter ? Give one example of each type.
The property/properties which enable copper metal to be used for making electric wires is/are :
What will happen if a saturated solution is :
- heated
- cooled
What is meant by a solution?
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
How would you prepare a saturated solution of sodium chloride in water at 25°C ? What will happen if this solution is cooled to 10°C ?
How will you separate a mixture of iron filings, chalk powder and common salt ?
What is chromatography ? State its two applications.
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
______ is a smallest particle.
Liquids have ______.
Higher the temperature, the higher the kinetic energy of particles.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Define the term matter.
