Advertisements
Advertisements
Question
Give one difference between atoms and molecules.
Advertisements
Solution
Atoms may or may not have independent existance. Molecules have independent existance.
APPEARS IN
RELATED QUESTIONS
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
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 the property which allows metals to be hammered into thin sheets.
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
Define Foam Give one example.
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Name the process which can be used to recover salt from an aqueous salt solution.
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
Matter is made up of ______.
Why wires cannot be drawn from materials such as stone or wood?
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
Rusting of an article made up of iron is called
Solids possess very high kinetic energy.
Solid is an arrangement of particles ______.
