Advertisements
Advertisements
प्रश्न
Which of the following are also considered to be the states of matter ?
- Plasma
- Platelets
- BEC
- BHC
पर्याय
(i) and (ii)
(ii) and (iii)
(ii) and (iii)
(ii) and (iv)
उत्तर
(i) and (iii)
Plasma and BEC (Bose Einstein condensate) are also considered as states of matter because plasma is mixture of free atoms and ions and BEC occupies space and has mass.
APPEARS IN
संबंधित प्रश्न
What is evaporation?
Wet clothes dry more quickly on a warm dry day than on a cold humid day. Explain.
Explain why in hot summer days water remains cool in earthen pots.
Define the following terms Condensation
How does the water kept in an earthen pot (matka) become cold during summer ?
How can the evaporation of a liquid be made faster ?
During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of :
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.
- Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E
- Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as ?
- Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.
- Name the most common substance belonging to state A.
- Which state of matter makes the sun and other stars to glow ?
Evaporation of water from lakes and river ______.
Comment on the following statements:
Rate of evaporation of an aqueous solution decreases with increase in humidity.