Advertisements
Advertisements
Question
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
Advertisements
Solution
The best evidence of the particles of matter are constantly moving comes from the studies of diffusion and Brownian motion.
APPEARS IN
RELATED QUESTIONS
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
State two characteristics of matter demonstrated by Brownian motion.
Name the property which enables metals to be drawn into wires.
Which type of elements, metals or non-metals, show the property of brittleness ?
Give reason why graphite is used for making elecrode in a dry cell.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
The elements which normally exist in the liquid state are :
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
Name the process by which common salt is purified.
How is cream separated from milk ?
Naphthalene can be separated from sand :
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
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
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
The fluidity of solids: ______.
Evaporation is always accompanied by ______ in temperature.
Define the term matter.
Define the term matter.
Define the term matter.
