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 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 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) The physical states are
(i) A-liquid
(ii) B-gas
(iii) C-solid
(iv) D-plasma and
(v) E-Bose-Einstein condensate (BEC).

(b) Ammonium chloride; and the name of the process is sublimation.

(c) Carbon dioxide

(d) Water

(e) Plasma is the state of matter that allows the sun and the other stars to glow.

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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.

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 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 ?

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

Fill in the following blanks with suitable words :

(a) Gases can be liquefied by applying ______and lowering______

(b) When steam condenses to form water, heat is ______

(d) Scientists say that there are actually five states of matter :solid, liquid, gas,______and______

(e) The state of matter called ______makes a fluorescent tube (or neon sign bulb) to glow

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