Question

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 the other stars glow?

Answer 1

a). A=liquid
B=Gas
C=Solid
D=Plasma
E=BEC( bose -einstein condensate)
b). napthalene ball by process of sublimation
c) Co2 ( dry ice)
d)water
e)Plasma



hope it helps.....

Answer 2

"Matter is anything that occupies space.

Matter can changes from "one form to another", i.e., from solid to liquid to gas. The phenomenon of conversion of matter from "one state to another" and back to the "original state" is known as "interconversion of matter".

Matter can be changed by changing temperature or pressure from "one state to another".

a)  A - Liquid

    B - Gas

    C - Solid

    D - Plasma

    E - Bose-Einstein condensate

b)  If the solid directly changes their state to vapour called sublimation.

    Example: Naphthalene balls

c)  Solid $CO_2$ is called dry ice. It normally belongs to liquids whose solid form changes directly into "gaseous state".

d)  A most common example of the liquid state is water.

e)  Plasma state of matter makes the sun and the other stars glow."