Short answer type question ( 3 marks each )-
Q.1 Express the following in Kelvin:
(i) 270C (ii) 3170C (iii) 00C
Q.2 Express the following temperature in degree Celsius:
(i) 578K (ii) 765K (iii) 418K
Q.3 Why is it advised that the iodised salt should be stored in airtight containers?
Q.4 Why can we not produce sound on the moon?
Q.5 Why do Kulfi sellers use the mixture of ice and common salt as freezing mixture?
Q.6 Define Plasma state of matter, write some example of plasma which we use in our daily life.
Q.7 Why the Kelvin scale of temperature is regarded better than the celsius scale?
Q.8 Though the rubber band is solid, its shape can be changed on stretching, give reason.
Q.9 What is sublimation? Name two substances which undergo sublimation?
Q.10 State one similarity and two differences between boiling and evaporation.
Please answer only if you know.
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Incorrect answer - REPORT
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Answered by
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Answer:
- 543k
- 3443k
- 273k
- 304c
- 491c
- 144c
- deliqusent
- to sound to travel it needs a medium
- the use it to prevent ice from melting
- plasma is a colourless liquid party of the blood
- as temp is always in positive value
- because of its elastic properties the molecules expand
- the process where transition from solid to gas takes place without passing from liquid state. example :dry ice
- boiling: - 100 c boiling point,
- evaporation : - in room temperature
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