Advertisements
Advertisements
Question
Write the states of water.
Solution
Water occurs naturally in three forms: ice, water, and water vapour. These forms are also called states of water. Ice is in solid form, water is in liquid form and water vapour is in gaseous form.
APPEARS IN
RELATED QUESTIONS
Give one example of the diffusion of a solid in another solid.
For the following statement, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions
State the property of the following substance.
Sodium nitrate is soluble in water, but calcium carbonate is not.
State the property of the following substance.
Manganese dioxide, a catalyst which alters the rate of a chemical reaction is black in colour.
State the property of the following substance.
The melting point of ice is 0°C.
Discuss briefly on three states of matter.
Match the following.
| Srl. no. | A | B | C |
| i | Separation of visible undesirable components | Water mixed with chalk powder | Magnetic Separation |
| ii | Separation of heavier and lighter components | Sand and water | Decantation |
| iii | Separation of insoluble impurities | Iron impurities | Filtration |
| iv | Separation of magnetic components from non-magnetic components | Rice and stone | Hand-picking |
| v | Separation of solids from liquids | Husk and paddy | Winnowing |
Choose the odd one:
______ particles are tightly packed into a definite shape.
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]
