Advertisements
Advertisements
प्रश्न
Give one difference between atoms and molecules.
उत्तर
Atoms may or may not have independent existance. While molecules have independent existence.
APPEARS IN
संबंधित प्रश्न
Name the smallest particle from which matter is made up.
What are fluids? Give two examples
For the following statement, say whether it describes a solid, a liquid or a gas.
Particles are quite close together
Fill the following chart showing twelve solids, twelve liquids, four gases and eight materials.
Matter in any state is composed of particles. Compare the three states of matter i,e. solids, liquids, and gases with reference to:
(a) intermolecular space
(b) the intermolecular force of attraction
(c) movement of particles
Describe simple experiments to prove that liquids have mass
State the property of the following substance.
Magnesium reacts with dilute hydrochloric acid, liberating hydrogen gas.
Solids are compressible.
How the matter is grouped on the basis of physical states?
A strong current of trivalent gaseous boron passed through a silicon crystal decreases the density of the crystal due to part replacement of silicon by boron and due to interstitial vacancies created by missing Si atoms. In one such experiment, one gram of silicon is taken and the boron atoms are found to be 1000 ppm by weight, when the density of the Si crystal decreases by 12%. The percentage of missing vacancies due to silicon, which are filled up by boron atoms will be ____ g. [Given · Atomic wt. Si= 30, B = 11]