The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The sate B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous Physicist.

(a) Name the physical states (i) A (ii) B (iii) C (iv) D and (v) E.

(b) Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as?

(c) Name one substance which normally belongs to state B but whose solid form changes directly into a gaseous state.

(d) Name the most common substance belonging to state A.

(e) Which state of matter makes the sun and other stars to glow?

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Solution

(a)
i. The state A has a fixed volume but no fixed shape - Liquid
ii. The state B can be compressed very easily by applying pressure - Gases
iii. The state C has a fixed shape as well as a fixed volume - Solid
iv. The state D is a mixture of free electrons and ions - Plasma
v. The state E is named after an Indian scientist and a famous physicist - Bose-Einstein condensates

(b) When solids changes to on heating the process is known as sublimation.

(c) Candle

(d) Water

(e) Plasma

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Similar questions

The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The state B neither has fixed volume nor fixed shape and state C has a fixed shape as well as a fixed volume. The state D in which particles exist in ionised state at higher temperatures whereas state E is named after an Indian scientist and a famous Physicist. Identify A, B, C, D, and E.

Q. 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.

(a) Name the substances (i) X (ii) Y and (iii) Z.
(b) What is the process of conversion of X into Y known as ?
(c) At which temperature X gets converted into Y ?
(d) What is the process of conversion of X into Z known as ?
(e) At which temperature X gets converted into Z ?

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.

(a) Name the substance. (i) X (ii) Y and (iii) Z.

(b) What is the process of conversion of X into Y known as?

(d) What is the process of conversion of X into Z known as?

(e) At which temperature X gets converted into Z?

Q. The process in which a gaseous state substance gets directly changed into solid state is known as

Q. It is common knowledge that matter exists in

3

states - solid, liquid and gas. Each of these can change into the other depending on temperature and pressure. Science has identified a fourth state of matter which is found in the stars. Name it.

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