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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?


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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