The scientists now say that there are actually five states of matter A, B, C, D, and E. State A has a fixed volume but no fixed shape. State B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. 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 that 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.
(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 that 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.
Important Questions on Matter in Our Surroundings
(a) What is the value of temperature x in Kelvin?
(b) What is the process P known as?
(c) What is the name of energy released during process P?
(d) What is the process Q known as?
(e) What is the name of energy absorbed during process Q?
When water is heated to a temperature X, it gets converted into steam at temperature X by a process called R. And when steam at temperature X is cooled, it gets reconverted into water at the same temperature x by a process called S.
(a) How much is the value of X in Kelvin?
(b) What is process R called?
(c) What is the name of the energy absorbed during the process R?
(d) What is process S known as?
(e) What is the name of energy released during the process S known as?
