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प्रश्न
A substance has neither a fixed shape nor a fixed volume. State whether it is a solid, a liquid or a gas.
उत्तर
Gases have neither a fixed shape nor a fixed volume; they acquire the shape and volume of the vessel in which they are kept.
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संबंधित प्रश्न
The mass per unit volume of a substance is called density.
(density = mass/volume).
Arrange the following in order of increasing density-
air, exhaust from chimneys, honey, water, chalk, cotton and iron.
Name two gases which are supplied in compressed form in homes and hospitals.
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance quickly spreads in the entire room. Name the process involved in this.
Why do gases diffuse very fast?
The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.
- Name the substances (i) X (ii) Y and (iii) Z.
- What is the process of conversion of X into Y known as ?
- At which temperature X gets converted into Y ?
- What is the process of conversion of X into Z known as ?
- At which temperature X gets converted into Z ?
______ is not affected by gravity.
Comment upon the following:-
filling a gas container
Comment upon the following:-
shape
Which of the following is false for gases?
Which of the following is TRUE about gaseous state?
