हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Evaporation takes place from the

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प्रश्न

Evaporation takes place from the

विकल्प

  • surface of liquid

  • throughout the liquid

  • mid-portion of the liquid

  • bottom of liquid.

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उत्तर

surface of liquid

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अध्याय 1: Matter - Objective Question [पृष्ठ १६]

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सेलिना Concise Physics [English] Class 8 ICSE
अध्याय 1 Matter
Objective Question | Q 4.7 | पृष्ठ १६

संबंधित प्रश्न

What type of clothes should we wear in summer?


A liquid can change into vapour state at all temperatures.


State three factors which affect the rate of evaporation of a liquid.


Explain with an example to demonstrates that when a liquid evaporates, it takes heat from its surroundings.


Why is heat energy needed to melt a solid ? What is this heat energy called ?


What type of clothes should we wear in summer ? Why ?


Why are we able to sip hot tea or milk faster from a saucer rather than from a cup ?


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.

  1. Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E
  2. Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as ?
  3. Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.
  4. Name the most common substance belonging to state A.
  5. Which state of matter makes the sun and other stars to glow ?

Can you suggest a method to collect water from sea water?


Look at Fig. 1.3 and suggest in which of the vessels A,B, C or D the rate of evaporation will be the highest? Explain.


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